The Effect of Deformation Ratio and Heat Treatment Time on the Microstructure and Mechanical Properties of A356 Aluminium Alloy During SIMA Process
International Journal of Mineral Processing and Extractive Metallurgy
Volume 2, Issue 3, May 2017, Pages: 28-33
Received: May 30, 2017; Accepted: Jul. 4, 2017; Published: Jul. 27, 2017
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Authors
Mahdi Amne Elahi, Center of Excellence for High Strength Alloys Technology (CEHSAT), School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
Hossein Gheisari, Center of Excellence for High Strength Alloys Technology (CEHSAT), School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
Saeed Shabestari, Center of Excellence for High Strength Alloys Technology (CEHSAT), School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
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Abstract
The influence of Strain Induced Melt Activated (SIMA) parameters on the globularization of α-Al and microstructure in A356 aluminium alloy were investigated in the present study. After production of samples using conventional permanent mold casting and cold rolling at various reduction, they were heat treated at 590°C for different holding time to spherodize the microstructure. The results indicated that, the grains became smaller, more spherical and having a homogenous distribution by increasing the deformation ratio. Increasing the holding time in heat treatment results the growth of globular grains. The necessary strain for recrystallization is about 15% and the optimum condition was achieved in the samples were 15% rolled and heat treated for 15 minutes at semi-solid temperature, regarding the maximum shape factor and minimum globular grains size. Further increasing in holding time is responsible for grain growth and hardness decline.
Keywords
A356 Aluminium Alloy, Semi Solid Processing, SIMA, Globular Structure, Cold Work
To cite this article
Mahdi Amne Elahi, Hossein Gheisari, Saeed Shabestari, The Effect of Deformation Ratio and Heat Treatment Time on the Microstructure and Mechanical Properties of A356 Aluminium Alloy During SIMA Process, International Journal of Mineral Processing and Extractive Metallurgy. Vol. 2, No. 3, 2017, pp. 28-33. doi: 10.11648/j.ijmpem.20170203.11
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Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
Flemings M. C, (1991) “Behavior of metal alloys in the semisolid state”, Metal Trans A, Vol. 22, pp. 957.
[2]
Fan Z, (2002) “Semisolid metal processing”, Int Mater Rev, Vol. 47, pp. 49-85.
[3]
Kiuchi M, Kopp R, (2002) “Mushy/semi-solid metal forming technology – present and future”, Ann CIRP, Vol. 51, pp. 653-670.
[4]
Atkinson HV, (2005) “Modelling the semisolid processing of metallic alloys”, Prog Mater Sci, Vol. 50, pp. 341-412.
[5]
Zoqui EJ, Paes M, Robert M. H, (2004) “Effect of macrostructure and microstructure on the viscosity of the A356 alloy in the semi-solid state”, J Mater Process Technol, Vol. 153–154, pp. 300-306.
[6]
Tzimas E, Zavaliangos A, (2000) “A comparative characterization of near-equiaxed microstructures as produced by spray casting, magnetohydrodynamic casting and the stress induced melt activated process”, Mater Sci Eng A, Vol. 289, pp. 217-227.
[7]
Tzimas E, Zavaliangos A, (2000) “Evolution of near-equiaxed microstructure in the semisolid state”, Mater Sci Eng A, Vol. 289, pp. 228-240.
[8]
Birol Y, (2007) “A357 thixoforming feedstock produced by cooling slope casting”, J Mater Process Technol, Vol. 186, pp. 94-101.
[9]
Fadavi Boostani A, Tahamtan S, (2009) “Fracture behavior of thixoformed A356 alloy produced by SIMA process”, J Alloys Compd, Vol. 481, pp. 220-227.
[10]
Zhao Z, Chen Q, Chao H, Huang S, (2010) “Microstructural evolution and tensile mechanical properties of thixoforged ZK60-Y magnesium alloys produced by two different routes”, Mater Des, Vol. 31, pp.1906-1916.
[11]
Luo S, Chen Q, Zhao Z, (2009) “Effects of processing parameters on the microstructure of ECAE-formed AZ91D magnesium alloy in the semi-solid state”, J Alloys Compd, Vol. 477, pp. 602-607.
[12]
Haghparast A, Nourimotlagh M, Alipour M, (2012) “Effect of the Strain-induced melt activation (SIMA) process on the tensile properties of a new developed super high strength aluminium alloy modified by Al-5Ti-1B grain refiner”, Mater Charact, Vol. 71, pp. 6-18.
[13]
Hassas-Irani S. B, Zarei-Hanzaki A, Bazaz B, Roostaei A. A, (2013) “Microstructure evolution and semi-solid deformation behavior of an A356 aluminium alloy processed by strain induced melt activated method”, Mater Des, Vol. 46, pp. 579-587.
[14]
Jiang J, Wang Y, Atkinson H. V, (2014) “Microstructural coarsening for 7005 aluminum alloy semisolid billets with high solid fraction”, Mater Charact, Vol. 90, pp. 52-61.
[15]
Jiang J, Wang Y, Xiao G, Nie X, (2016) “Comparison of microstructural evolution of 7075 aluminum alloy fabricated by SIMA and RAP”, J Mater Process Technol, Vol. 238, pp. 361-372.
[16]
Lin H. Q, Wang J. G, Wang H. Y, Jiang Q. C, (2007) “Effect of predeformation on the globular grains in AZ91D alloy during strain induced melt activation (SIMA) process”, J Alloys Compd, Vol. 431, pp. 141-147.
[17]
Jiang H, Li M, (2005) “Microscopic observation of cold-deformed Al–4Cu–Mg alloy samples after semi-solid heat treatments”, Mater Charact, Vol. 54, pp. 451- 457.
[18]
Lin C. W, Hung F. Y, Lui T. S, Chen L. H, (2016) “High-temperature deformation resistance and forming behavior of two-step SIMA-processed 6066 alloy”, Mater Sci Eng A, Vol. 659, pp. 143-157.
[19]
Alipour M, Emamy M, (2011) “Effects of Al–5Ti–1B on the structure and hardness of a super high strength aluminium alloy produced by strain-induced melt activation process”, Mater Des, Vol. 32, pp. 4485-4492.
[20]
Emamy M, Razaghian A, Karshenas M, (2013) “The effect of strain-induced melt activation process on the microstructure and mechanical properties of Ti-refined A6070 Al alloy”, Mater Des, Vol. 46, pp. 824-831.
[21]
Moradi M, Nili-Ahmadabadi M, Heidarian B, Ashouri S, (2008) “Defect control and mechanical properties of thixoformed Al-Si alloy”, J Alloys Compd, pp. 1-32.
[22]
Sirong Y, Dongcheng L, Kim N, (2006) “Microstructure evolution of SIMA processed Al2024”, Mater Sci Eng A, Vol. 420, pp. 165-170.
[23]
Mohasel Afshari B, Mirjavadi S. S, Askari Dolatabad Y, Aghajani M, Besharati Givi M. K, Alipour M, Emamy M, (2016) “Effects of pre-deformation on microstructure and tensile properties of Al-Zn-Mg-Cu alloy produced by modified strain induced melt activation”, Trans Nonferrous Met Soc China, Vol. 26, pp. 2283-2295.
[24]
Flemings M. C, (1974) “Solidification Processing, McGraw-Hill Book Company”.
[25]
Yan G, Zhao S, Ma S, Shou H, (2012) “Microstructural evolution of A356.2 alloy prepared by the SIMA process”, Mater Charact, Vol. 99, pp. 45-5.
[26]
Bolorui A, Shahmiri M, Cheshmeh ENH, (2010) “Microstructural evolution during semisolid state strain induced melt activation process of aluminium 7075 alloy”, Trans Nonferrous Met Soc China, Vol. 20, pp.1663-71.
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