2015
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Bending and Free Vibration Analyses of Rectangular Laminated Composite Plates Resting on Elastic Foundation Using a Refined Shear Deformation Theory
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2
In this paper, a closed form solution for bending and free vibration analyses of simply supported rectangular laminated composite plates is presented. The static and free vibration behavior of symmetric and antisymmetric laminates is investigated using a refined firstorder shear deformation theory. The Winkler–Pasternak twoparameter model is employed to express the interaction between the laminated plates and the elastic foundation. The Hamilton’s principle is used to derive the governing equations of motion. The accuracy and efficiency of the theory are verified by comparing the developed results with those obtained using different laminate theories. The laminate theories including the classical plate theory, the classical firstorder shear deformation theory, the higher order shear deformation theory and a threedimensional layerwise theory are selected in order to perform a comprehensive comparison. The effects of the elastic foundation parameters, orthotropy ratio and widthtothickness ratio on the bending deflection and fundamental frequency of laminates are investigated.
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1
13


A. R.
Setoodeh
Faculty of Mechanical &amp; Aerospace Engineering, Shiraz University of Technology, Shiraz, Iran
Faculty of Mechanical &amp; Aerospace
Iran
asetood@yahoo.com


A.
Azizi
Faculty of Mechanical & Aerospace Engineering, Shiraz University of Technology, Shiraz, Iran
Faculty of Mechanical & Aerospace
Iran
azizi2ali@yahoo.com
Bending analysis
free vibration
Refined shear deformation theory
Twoparameter elastic foundation
[ [1] S. Shojaee, N. Valizadeh, E. Izadpanah, T. Bui and T. V. Vu, Free vibration and buckling analysis of laminated composite plates using the NURBSbased isogeometric finite element method,Journal of Composite Structure, 94(2012) 1677–1693. ## [2] E. Reissner, The effect of transverse shear deformation on the bending of elastic plates, Journal of Composite materials, 12(1945) 69–72. ##[3] J.N. Reddy, A simple higherorder theory for laminated composite plates, Journal of Applied Mechanics, 51(1984) 745–752. ##[4] A.J.M. Ferreira, C.M.C. Roque and R.M.N. Jorge, Analysis of composite plates by trigonometric shear deformation theory and multiquadrics, Journal of Composite Structure, 83 (2005)2225–2237. ##[5] K.P. Soldatos, A transverse shear deformation theory for homogeneous monoclinic plates, Journal of Acta Mechanica, 94(1992) 195–220. ##[6] M. Karam, K.S. Afaq and S. Mistou, Mechanical behaviour of laminated composite beam by the new multilayered laminated composite structures model with transverse shear stress continuity, Journal of Solids and Structures, 40(2003) 1525–1546. ##[7] H.T. Thai and D.H. Choi, A simple firstorder shear deformation theory for the bending and free vibration analysis of functionally graded plates, Journal of Composite Structure, 101 (2013) 332–340. ##[8] H.T. Thai, D.H. Choi, Finite element formulation of various four unknown shear deformation theories for functionally graded plates, Journal of Finite Elements in Analysis and Design, 75(2013) 50–61. ##[9] H.T. Thai and D.H. Choi, A simple firstorder shear deformation theory for laminated composite plates, Journal of Composite Structure, 106(2013) 754–763. ##[10] T. Katsikadelis and A. E. Armenakas, Plates on elastic foundation by BIE method, Journal of Engineering Mechanics, 110(1984) 10861105. ##[11] D. Dinev, analytical solution of beam on elastic foundation by singularity functions, Journal of Engineering Mechanics, 19(2012) 381–392. ##[12] M. Dehghany and A. Farajpour, Free vibration of simply supported rectangular plates on Pasternak foundation: An exact and threedimensional solution, Journal of Engineering Solid Mechanics, 2(2013) 2942. ##[13] S.S. Akavci, Analysis of thick laminated composite plates on an elastic foundation with the use of varius plate theories, Journal of Mechanics of Composite Materials, 41(2005) 663682. ##[14] A. Lal, B. N. Singh and R. Kumar, Static Response of Laminated Composite Plates Resting on Elastic Foundation with Uncertain System Properties, Journal of Reinforced Plastics and Composites, 26(2007) 807–823. ##[15] S.S. Akavci, H.R. Yerli and A. Dogan, The first order shear deformation theory for symmetrically laminated composite plates on elastic foundation, The Arabian Journal for Science and Engineering, 32(2007) 341348. ##[16] S.S. Akavci, Buckling and free vibration analysis of symmetric and antisymmetric laminated composite plates on an elastic foundation, Journal of Reinforced Plastics and Composites, 26(2007) 1907–1913. ##[17] K. Nedri, N. El Meiche and A. Tounsi, Free vibration analysis of laminated composite plates resting on elastic foundation by using a refined hyperbolic shear deformation theory, Journal of Mechanics of Composite Materials, 49(2013) 943–958. ##[18] A.R. Setoodeh and G. Karami, Static, free vibration and buckling analysis of anisotropic thick laminated composite plates on distributed and point elastic supports using a 3D layerwise FEM, Journal of Engineering Structures, 26(2003) 211–220. ##[19] J.N. Reddy, Mechanics of laminated composite plates and shells: theory and analysis, CRC Press, Boca Raton, (2004). ##[20] A.K. Noor, Free vibrations of multilayered composite plates, AIAA Journal, 11(1973) 1038–1039. ##]
Effect of the Particle Size on the Deformation and Fracture Behavior of Al/4vol.%Al2O3 Composite Produced by Accumulative Roll Bonding (ARB)
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In this study, Al/Al2O3 composites with two different particle sizes of 1 µm and 0.3 µm were produced via accumulative roll bonding (ARB). The microstructure evolution, mechanical properties and fracture behavior of the composites were investigated. Results show that higher ARB cycles are required to achieve a uniform distribution of particles in the composite with 0.3 µm particle size. During ARB, dense cluster of the particles broke up and a uniform distribution of particles was achieved after eight ARB cycles. The tensile strength of the composite with 1 µm and 0.3 µm particle size enhanced by increasing the number of ARB cycles, reached to about 170 MPa and 175 MPa, respectively, in comparison to that of the annealed Al (about 47 MPa). The finer particles caused a higher tensile strength due to the decrease in the distance between the particles at a given volume fraction. The fracture surface of both composites revealed ductile type fracture characterized by dimples. The dimples in the composite with particle size of 1 μm were larger and deeper.
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26


M.
Reihanian
Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University, Ahvaz, Iran
Department of Materials Science and Engineering,
Iran
m.reihanian@scu.ac.ir


M.
Naseri
Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Department of Materials Science and Engineering,
Iran
majid_na3ri@yahoo.com


M.
Jalili Shahmansouri
Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Department of Materials Science and Engineering,
Iran
masumehjalili@gmail.com
Accumulative roll bonding (ARB)
Metal matrix composites (MMCs)
Microstructure
Mechanical properties
[ [1] D.B. Miracle, Metal matrix composites–From science to technological significance, Composites Science and Technology, 65(2005) 25262540. ##[2] D.J. Lloyd, Particle reinforced aluminium and magnesium matrix composites, International Materials Reviews, 39(1994) 123. ##[3] G. O'Donnell and L. Looney, Production of aluminium matrix composite components using conventional PM technology, Materials Science and Engineering: A, 303(2001) 292301. ##[4] J. Hashim, L. Looney and M.S.J. Hashmi, Metal matrix composites: production by the stir casting method, Journal of Materials Processing Technology, 92–93(1999) 17. ##[5] M. Alizadeh and M.H. Paydar, Fabrication of nanostructure Al/SiCP composite by accumulative rollbonding (ARB) process, Journal of Alloys and Compounds, 492 (2010) 231235. ##[6] R. Jamaati and M.R. Toroghinejad, Application of ARB process for manufacturing highstrength, finely dispersed and highly uniform Cu/Al2O3 composite, Materials Science and Engineering: A, 527(2010) 74307435. ##[7] M. Reihanian, F.K. Hadadian and M.H. Paydar, Fabrication of Al–2vol% Al2O3/SiC hybrid composite via accumulative roll bonding (ARB): An investigation of the microstructure and mechanical properties, Materials Science and Engineering: A, 607(2014) 188196. ##[8] R. Jamaati, M.R. Toroghinejad and H. Edris, Effect of SiC nanoparticles on the mechanical properties of steelbased nanocomposite produced by accumulative roll bonding process, Materials and Design, 54(2014) 168173. ##[9] Y. Saito, H. Utsunomiya, N. Tsuji and T. Sakai, Novel ultrahigh straining process for bulk materials—development of the accumulative rollbonding (ARB) process, Acta Materialia, 47 (1999) 579583. ##[10] B.L. Li, N. Tsuji and N. Kamikawa, Microstructure homogeneity in various metallic materials heavily deformed by accumulative rollbonding, Materials Science and Engineering: A, 423 (2006) 331342. ##[11] R. Jamaati and M.R. Toroghinejad, Manufacturing of highstrength aluminum/alumina composite by accumulative roll bonding, Materials Science and Engineering: A, 527(2010) 41464151. ##[12] M. Rezayat, A. Akbarzadeh and A. Owhadi, Production of high strength Al–Al2O3 composite by accumulative roll bonding, Composites Part A: Applied Science and Manufacturing, 43 (2012) 261267. ##[13] R. Jamaati, S. Amirkhanlou, M.R. Toroghinejad and B. Niroumand, Effect of particle size on microstructure and mechanical properties of composites produced by ARB process, Materials Science and Engineering: A, 528(2011) 21432148. ##[14] M. Karbalaei Akbari, H.R. Baharvandi and K. Shirvanimoghaddam, Tensile and fracture behavior of nano/micro TiB2 particle reinforced casting A356 aluminum alloy composites, Materials and Design, 66(2015) 50161. ##[15] M. Alizadeh & M.H. Paydar, Fabrication of Al/SiCP composite strips by repeated rollbonding (RRB) process, Journal of Alloys and Compounds, 477(2009) 811816. ##[16] M. Alizadeh, Comparison of nanostructured Al/B4C composite produced by ARB and Al/B4C composite produced by RRB process, Materials Science and Engineering: A, 528(2010) 578582. ##[17] A. Yazdani, E. Salahinejad, J. Moradgholi and M. Hosseini, A new consideration on reinforcement distribution in the different planes of nanostructured metal matrix composite sheets prepared by accumulative roll bonding (ARB), Journal of Alloys and Compounds, 509 (2011) 95629564. ## [18] L. Li, K. Nagai and F. Yin, Progress in cold roll bonding of metals, Science and Technology of Advanced Materials, 9(2008) 023001. ##[19] M. Alizadeh and M.H. Paydar, Highstrength nanostructured Al/B4C composite processed by crossroll accumulative roll bonding, Materials Science and Engineering: A, 538(2012) 1419. ##[20] M. Reihanian, E. Bagherpour and M.H. Paydar, On the achievement of uniform particle distribution in metal matrix composites fabricated by accumulative roll bonding, Materials Letters, 91(2013) 5962. ##[21] M. Alizadeh, H.A. beni, M. Ghaffari and R. Amini, Properties of high specific strength Al–4wt.% Al2O3/B4C nanocomposite produced by accumulative roll bonding process, Materials and Design, 50(2013) 427432. ##[22] M. Rezayat, A. Akbarzadeh and A. Owhadi, Fabrication of highstrength Al/SiCp nanocomposite sheets by accumulative roll bonding, Metall and Mat Trans A, 43(2012) 20852093. ##[23] M. Reihanian, R. Ebrahimi, N. Tsuji and M.M. Moshksar, Analysis of the mechanical properties and deformation behavior of nanostructured commercially pure Al processed by equal channel angular pressing (ECAP), Materials Science and Engineering: A, 473(2008) 189194. ##[24] M. Reihanian, R. Ebrahimi, M.M. Moshksar, D. Terada and N. Tsuji, Microstructure quantification and correlation with flow stress of ultrafine grained commercially pure Al fabricated by equal channel angular pressing (ECAP), Materials Characterization, 59(2008) 13121323. ##[25] T.H. Courtney, Mechanical behavior of materials, 2nd edition, Waveland Press, Inc., 2005. ##[26] H. Sekine and R. Chent, A combined microstructure strengthening analysis of SiCp/Al metal matrix composites, Composites, 26(1995) 183188. ##[27] M. Alizadeh, Strengthening mechanisms in particulate Al/B4C composites produced by repeated roll bonding process, Journal of Alloys and Compounds, 509(2011) 22432247. ##[28] A. Azushima, R. Kopp, A. Korhonen, D.Y. Yang, F. Micari, G.D. Lahoti, P. Groche, J. Yanagimoto, N. Tsuji, A. Rosochowski and A. Yanagida, Severe plastic deformation (SPD) processes for metals, CIRP Annals  Manufacturing Technology, 57(2008) 716735. ##[29] M. Alizadeh and M. Talebian, Fabrication of Al/Cup composite by accumulative roll bonding process and investigation of mechanical properties, Materials Science and Engineering: A, 558(2012) 331337. ##[30] A. Ahmadi, M.R. Toroghinejad and A. Najafizadeh, Evaluation of microstructure and mechanical properties of Al/Al2O3/SiC hybrid composite fabricated by accumulative roll bonding process, Materials and Design, 53(2014) 1319. ##[31] M.A. Meyers and K.K. Chawla, Mechanical Behavior of Materials, 2nd edition, Cambridge University Press, UK, (2009). ##[32] D.J. Wulpi, Understanding how Components Fail, 3rd edition, ASM International, USA, (2013). ##]
Investigation of Effective Parameters of the TwoLayer Sheet Hydroforming Process for Hollow Parts with Complex Geometry
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AbstractHydroforming process is a deep stretching process only with the difference that a fluid is used instead of the mandrel. This paper investigates the hydroforming process of noncylindrical and nonspherical geometries using finite element analysis software to calculate the influences of effective process parameters such as the coefficient of friction between the surfaces and the pressure applied during the process. Results of this process simulation indicate that decreasing the friction between surfaces, with an optimum lubrication, can decrease the changes in thickness which is related to sheet heightening this leads to a final product with more uniform thickness and more appropriate strength. On the other hand, it is observed that with pressure change there are very slight changes in the thickness for this geometry which can be neglected. The geometry of the mold also showed a great influence on the final quality of the formed sheet.Keywords: sheet hydroforming, complex geometry, finite element analysis, friction, multistage pressure.
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34


M.
Saghari
Mechanical Engineering Department, Islamic Azad University, Shiraz, Iran
Mechanical Engineering Department, Islamic
Iran
m.saghari2008@gmail.com


A.
Afsari
Mechanical Engineering Department, Islamic Azad university, Shiraz  Iran
Mechanical Engineering Department, Islamic
Iran
dr.afsari1@yahoo.com
sheet hydroforming
complex geometry
finite element analysis
friction
multistage pressure
[ [1] G. Schieß and H. Lindner, Verfahren zum Herstellen eines Hohlkörpers, Brevet DE 4232 161 A1(1992). ##[2] M. Geiger and F. Vollertsen, Verfahren zum Herstellen von schalenförmingen Hohlstrukturen aus gedoppelten Blechzuschnitten mittels Innenhochdruckum formung Brevet DE 195 35 870 A1(1997). ##[3] D. Schmoeckel and P. Dick, High pressure forming of sheet metal sheets in producing hollowformed parts, Prod. Eng., Annals of the WGP, 1(1997) 58. ##[4] A. Assempour and M. R. Emami, Pressure estimation in the hydroforming process of sheet metal pairs with the method of upper bound analysis, Journal of Materials Processing Technology, 209(2009) 2270–2276. ##[5] M. Geiger, M. Merklein and M. Cojutti, Hydroforming of inhomogeneous sheet pairs with counter pressure, German Academic Society for Production Engineering (WGP), Prod. Eng. Res. Devel. 3(2009) 17–22. ##[6] L. Tang, T. Zejun, H. Zhubin and Y. Shijian, Warm hydroforming of magnesium alloy tube with large expansion ratio, Trans. Nonferrous met. Soc. China (2010). ##[7] M. Tolazzi, Hydroforming applications in automotive: a review, International Journal of Material Forming, 3(2010) 11:307–310. ##[8] L. Wei, L. Gang, C. Xiaolei, X. Yongchao and Y. Shijian, Formability influenced by process loading path of double sheet hydroforming, Trans. Nonferrous met. Soc. China (2011). ##[9] L. Xin, X. Yongchao and Y. Shijian, Hydroforming of aluminum alloy complexshaped components, trans. Nonferrous met. Soc. China (2011). ##[10] L. Wei, C. Yizhe, L. Gang and C. Xiaolei, Welded double sheet hydroforming of complex hollow component, Trans. Nonferrous met. Soc. China (2012). ##[11] G. Ardalan, Design and calculation types of metal molds, Publishing Idea, Tehran (2004). ##]
Wave Propagation in Rectangular Nanoplates Based on a New Strain Gradient Elasticity Theory with Considering inPlane Magnetic Field
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In this paper, on the basis of a new strain gradient elasticity theory, wave propagation in rectangular nanoplates by considering inplane magnetic field is studied. This strain gradient theory has two gradient parameters and has the ability to compare with the nonlocal elasticity theory. From the best knowledge of author, it is the first time that this theory is used for investigating wave propagation in nanoplates. It is also the first time that magnetic field is considered in modeling the wave propagation in rectangular nanoplates. In this article, an analytical method is adopted to achieve an exact solution for the governing equation. To verify the present methodology, our results are verified with the results published by present authors and other researchers. It is obtained that with the increase of static gradient parameter, the frequencies are increase. It is also shown that the phase velocities increase for the increase of magnetic field.
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43


M.
Janghorban
School of Mechanical Engineering, Shiraz University, Shiraz, Iran
School of Mechanical Engineering, Shiraz
Iran
maziar.janghorban@gmail.com


M. R.
Nami
School of Mechanical Engineering, Shiraz University, Shiraz, Iran
School of Mechanical Engineering, Shiraz
Iran
nami@shirazu.ac.ir
Aifantis’s strain gradient elasticity theory
Wave propagation
Magnetic field
Rectangular nanoplates
[ [1] K. Kiani, Free vibration of conducting nanoplates exposed to unidirectional inplane magnetic fields using nonlocal shear deformable plate theories, Physica E: Lowdimensional Systems and Nanostructures, 57(2014) 179–192. ##[2] Y. Leng, J. Zheng, J. Qu and X. Li, Thermal stability and magnetic anisotropy of nickel nanoplates, Journal of Materials Science, 44, 17(2009) 45994603. ##[3] J. Klinovaja, M. J. Schmidt, B. Braunecker and D. Loss (2011). Carbon nanotubes in electric and magnetic fields, Phys. Rev. B, 84(2011) 085452. ##[4] J. Kono, R. J. Nicholas and S. Roche, High magnetic field phenomena in carbon nanotubes, Carbon Nanotubes Topics in Applied Physics, 111(2008) 393421 ##[5] A. Ghorbanpour Arani, A. Jalilvand and R. Kolahchi, Wave propagation of magnetic nanofluidconveying doublewalled carbon nanotubes in the presence of longitudinal magnetic field, Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanoengineering and Nanosystems (2013) 1740349913488575. ##[6] K.L. Metlov and K.Y. Guslienko, Stability of magnetic vortex in soft magnetic nanosized circular cylinder, Journal of Magnetism and Magnetic Materials, 242–245(2002) Part 2, 1015–1017 ##[7] S. Li, H. J. Xie and X. Wang, Dynamic characteristics of multiwalled carbon nanotubes under a transverse magnetic field, Bull. Mater. Sci., 34, 1(2011) 45–52. ##[8] B.K. Jang, Y. Sakka and S.K. Woo, Alignment of carbon nanotubes by magnetic fields and aqueous dispersion, J. Phys.: Conf. Ser.( 2009) 156 012005. ##[9] T. Murmu, M.A. McCarthy & S. Adhikari, Inplane magnetic field affected transverse vibration of embedded singlelayer graphene sheets using equivalent nonlocal elasticity approach, Composite Structures, 96(2013) 57–63. ##[10] D. Yi, T.C. Wang and S. Chen, New strain gradient theory and analysis, Acta Mechanica Solida Sinica, 22 (2009), 4552. ##[11] E.C. Aifantis and H. Askes, Gradient elasticity and flexural wave dispersion in carbon nanotubes, Physical Review B, 80(2009). 195412. ##[12] P. Beskou and D. E. Beskos, Static, stability and dynamic analysis of gradient elastic flexural Kirchhoff plates, Arch Appl Mech, 78(2008): 625–635. DOI 10.1007/s0041900701665. ##[13] T. Murmu, M.A. McCarthy and S. Adhikari, Inplane magnetic field affected transverse vibration of embedded singlelayer graphene sheets using equivalent nonlocal elasticity approach. Composite Structures, 96(2013) 57–63. ##[14] Y.Z. Wang, F.M. Li and K. Kishimoto, Scale effects on flexural wave propagation in nanoplate embedded in elastic matrix with initial stress, Appl Phys A, 99(2010) 907–911. DOI 10.1007/s0033901056664. ##[15] M. R. Nami and M. Janghorban, Wave propagation in rectangular nanoplates based on strain gradient theory with one gradient parameter with considering initial stress. Modern Physics Letters B, (2014), DOI: 10.1142/S0217984914500213. ##[16] M. R. Nami and M. Janghorban, Static analysis of rectangular nanoplates using Trigonometric shear deformation theory based on nonlocal elasticity theory. Beilstein Journal of Nanotechnology, 4(2013) 968973. ##[17] Nami, M. R. and M. Janghorban, Static analysis of rectangular nanoplates using exponential shear deformation theory based on strain gradient elasticity theory, Iranian Journal of Materials Forming, 1(2014) 113. ##[18] M.R. Nami, M. Janghorban and M. Damadam, Thermal buckling analysis of functionally graded rectangular nanoplates based on nonlocal thirdorder shear deformation theory, Aerospace Science and Technology, 41(2015) 715. ##]
Mechanical and Wear Properties of AlNip Composites Produced by ARB Process
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In this research, AlNi particle composite strips are formed by accumulative roll bonding (ARB) process using Al strips and Ni powder. The rule of ARB cycles and volume percentage (Vol%) of Ni powder on the microstructure, wear resistance and mechanical properties of the formed composites are investigated. According to the tensile test results, the yield stress and tensile strengths of the Al Ni (p) composites tend to increase with rising of the ARB cycles. Ductility of the ARB samples significantly decreased in the first cycle of the ARB process and then elevated lightly from the second pass of the ARB. Furthermore, the yield stress and tensile strengths of the Al  Ni (p) composites with different vol% of Ni powder, increased with increasing the amount of Ni Powder. Also the hardness and wear resistance of produced composites were investigated. Micro hardness and wear resistance of these composites increased with increasing the number of ARB cycles and the amount of Ni particles content during ARB Process.
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53


H.
Baharipour
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
Department of Materials Science and Engineering,
Iran
hdaneshma@yahoo.com


H.
Daneshmanesh
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
Department of Materials Science and Engineering,
Iran
daneshma@shirazu.ac.ir


F.
Ghanbari Mardasi
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
Department of Materials Science and Engineering,
Iran
hdaneshma@gmail.com
Metalmatrix composites (MMCs)
Particlereinforcement
Mechanical properties
Electron microscopy
[ [1] M. F. Ashby and D. R. H. Zones, Engineering materials, 2, ButterworthHeinemann, 2nd edition, (1998). ##[2] J.W. Kaczmar, K. Pietrzak and W. Wlosinski, The production and application of metal matrix composite materials, Journal of Materials Processing Technology, 106(2000) 58–67. ##[3] H.Y. Wang, Q.C. Jiang, Y. Wang, B.X. Ma and F. Zhao, Fabrication of TiB2 particulate reinforced magnesium matrix composites by powder metallurgy, Materials Letter, 58(2004) 3509–3513. ##[4] V.K. Lindroos and M.J. Talvitie, Recent advances in metal matrix composites, Journal of Materials Processing Technology, 53(1995) 273–284. ##[5] M. Alizadeha and M.H. Paydar, Highstrength nanostructured Al/B4C composite processed by crossroll accumulative roll bonding, Materials Science and Engineering: A, 538(2012) 14–19. ##[6] S. Abis, Characteristics of an aluminium alloy/Alumina Metal Matrix composite, Composite. Science and Technology, 35 (1989) 1–11. ##[7] A. Mozaffari, M. Hosseini and H. DaneshManesh, Al/Ni metal intermetallic composite produced by accumulative roll bonding and reaction annealing, Journal of Alloys and Compounds, 509(2011) 9938– 9945. ##[8] K. Kitazono, E. Sato and K. Kuribayashi, Novel manufacturing process of closedcell aluminum foam by accumulative rollbonding, Scripta Materialia, 50(2004) 495–8. ##[9] A. Yazdani, E. Salahinejad, J. Moradgholi and M. Hosseini, A new consideration on reinforcement distribution in the different planes of nanostructured metal matrix composite sheets prepared by accumulative roll bonding (ARB), Journal of Alloys and Compounds, 509(2011) 9562–9564. ##[10] R. Jamaati and M.R. Toroghinejad, Manufacturing of highstrength aluminum/alumina composite by accumulative roll bonding, Materials Science and Engineering: A, 527(1617) (2010)2320–2326. ##[11] Z.P. Xing, S.B. Kang and H.W. Kim, Structure and properties of AA3003 alloy produced by accumulative roll bonding process, Jornal of Materials Science, 37(2002) 717–722. ##[12] X. Huang, N. Kamikawa and N. Hansen, Strengthening mechanisms in nanostructured aluminum, Materials Science and Engineering: A, 483–484 (2008)102–104. ##[13] N. Hansen, X. Huang, R. Ueji and R. N. Tsuji, Structure and strength after large strain deformation, Materials Science and Engineering: A, 387–389(2004) 191–194. ##[14] M. Hosseini and H. Danesh Manesh, Immersed friction stir welding of ultrafine grained accumulative rollbonded Al alloy, Materials & Design, 31(2010) 4786–4791. ##[15] M. Alizadeh, M.H. Paydar, Fabrication of nanostructure Al/SiCP composite by accumulative rollbonding (ARB) process, Journal of Alloys and Compounds, 492(2010) 231–235 . ## [16] M. Alizadeh, Comparison of nanostructured Al/B4C composite produced by ARB and Al/B4C composite produced by RRB process, Materials Science and Engineering: A, 528(2010) 578–582. ##[17] M. Shaarbaf and M.R. Toroghinejad, Nanograined copper strip produced by accumulative roll bonding process, Materials Science and Engineering: A, 473(2008) 28–33. ##[18] M. Barmouza, M.K.B. Givia and J. Seyfi, On the role of processing parameters in producing Cu/SiC metal matrix composites via friction stir processing: Investigating microstructure, microhardness, wear and tensile behavior, Materials Characterization, 62(2011) 108–117. ##[19] Y.S. Kim, J.S. Ha and D.H. Shin, Sliding wear characteristics of ultrafinegrained nonstrainhardening aluminummagnesium alloys, Materials Science Forum., 475–479(2005) 401–404. ##[20] Y.S. Kim, T.O. Lee and D.H. Shin, Microstructural Evolution and Mechanical Properties of Ultrafine Grained Commercially Pure 1100 Aluminum Alloy Processed by Accumulative RollBonding (ARB), Materials Science Forum, 449–452(2004) 625–628. ##[21] M. Eizadjou, H. DaneshManesh, K. Janghorban, Microstructure and mechanical properties of ultrafine grains (UFGs) aluminum strips produced by ARB process, Journal of Alloys and Compounds, 474(2009) 406–415. ##[22] A. KazemiTalachi, M. Eizadjou, H. DaneshManesh and K. Janghorban, Wear characteristics of severely deformed aluminum sheets by accumulative roll bonding (ARB) process, Materials Characterization, 62(2011) 12–21. ##]
Optimization of thermomechanical parameters to produce an ultrahigh strength compressor disk
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2
Structural steels with very high strength levels are often referred to as ultrahighstrength steels (UHSS). The usage of UHSS has been extensively studied in aerospace industries and offshore platforms. In this study, medium carbon low alloy steel (AMS6305) was thermomechanicaly treated to obtain an ultrahigh strength bainitic steel for aircraft engine compressor disk. A novel themomechanical treatment was introduced to optimize microstructure and mechanical properties. By replacing the common quenchtemper microstructure of compressor disk with bainite microstructure, an ultrahigh strength bainitic steel was achieved. Based on the results obtained, the final microstructures following predeformation and subsequent heat treatment showed a very good combination of strength and toughness. Furthermore, it has been shown that austempering time and temperature play a major role in achieving ultrahigh strength bainitic steels. The optimized strength and toughness was achieved by up quenching treatment. This is due to partitioning of prior austenite grains by tempered martensite plates.
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61


M.
Aghaiekhafri
Faculty of Materials Science and Engineering, K.N. Toosi University of Technology, Postal Code: 1999143344, Tehran, Iran
Faculty of Materials Science and Engineering,
Iran
maghaei@kntu.ac.ir


M.H.
Sheikh Ansary
Faculty of Materials Science and Engineering, K.N. Toosi University of Technology, Postal Code: 1999143344, Tehran, Iran
Faculty of Materials Science and Engineering,
Iran
msheikhansari@mail.kntu.ac.ir
Thermomechanical treatment
Bainite microstructure
Mechanical properties
Up quenching
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