Deformation Behavior and Microstructure Evolution of 6063 Alloy during Hot Compression

Abstract:

Hot compression tests of homogenized 6063 Al alloy were carried out in the temperatures range from 390°C to 510°C and strain rates from 1s^-1 to 20s^-1 on a Gleeble-3500 thermal simulation machine. The results showed that the flow stress decreased with increasing deformation temperature or decreasing strain rate. The dynamic softening effect was more obvious when the alloy was deformed at strain rate of 20 s^-1. The Arrhenius-type constitutive equation with strain compensation can accurately describe the flow stress of 6063 aluminum alloy during hot compression. Shear bands appeared in grains interior when the alloy deformed at high strain rates, corresponding to high Zenner-Hollomon (Z) parameters. When deformed under the conditions with low Z parameters, the dynamic recrystallization started occurred.

• Periodical: Materials Science Forum (Volume 913)
• Pages: 63-68
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.913.63
• Online since: February 2018
• Authors: Zhu Hua Yu, Da Tong Zhang*, Wen Zhang, Cheng Qiu
• Keywords: 6063 Al Alloy, Constitutive Equation, Hot Compression, Microstructure

References

[1] Huang C Q, Diao J P, Deng H, et al, Microstructure evolution of 6016 aluminum alloy during compression at elevated temperatures by hot rolling emulation, J. Trans, Nonferrous Met. Soc. China. 23(6) (2013) 1576-1582.

DOI: 10.1016/s1003-6326(13)62633-3

[2] Dong Y, Zhang C, Zhao G, et al, Constitutive equation and processing maps of an Al–Mg–Si aluminum alloy: Determination and application in simulating extrusion process of complex profiles, J. Mater. Des. 92 (2016) 983-997.

DOI: 10.1016/j.matdes.2015.12.113

[3] Yang Q Y, Yang D, Zhang Z Q, et al, Flow behavior and microstructure evolution of 6A82 aluminum alloy with high copper content during hot compression deformation at elevated temperatures, J. Trans, Nonferrous Met. Soc. China. 26(3) (2016) 649-657.

DOI: 10.1016/s1003-6326(16)64154-7

[4] Sun Z C, Zheng L S, Yang H, Softening mechanism and microstructure evolution of as-extruded 7075 aluminum alloy during hot deformation, J. Mater. Charact. 90(4) (2014) 71-80.

DOI: 10.1016/j.matchar.2014.01.019

[5] Chen G, Chen L, Zhao G, et al, Microstructure analysis of an Al-Zn-Mg alloy during porthole die extrusion based on modeling of constitutive equation and dynamic recrystallization, J. Alloys Comp. 710 (2017) 80-91.

DOI: 10.1016/j.jallcom.2017.03.240

[6] Sun C C, Liu K, Wang Z H, et al, Hot deformation behaviors and processing maps of Mg–Zn–Er alloys based on Gleeble–1500 hot compression simulation, J. Trans, Nonferrous Met. Soc. China. 26(12) (2016) 3123-3134.

DOI: 10.1016/s1003-6326(16)64444-8

[7] Feng D, Zhang X M, Liu S D, et al, Constitutive equation and hot deformation behavior of homogenized Al–7. 68Zn–2. 12Mg–1. 98Cu–0. 12Zr alloy during compression at elevated temperature, J. Mater. Sci. Eng. A. 608(25) (2014) 63-72.

DOI: 10.1016/j.msea.2014.04.055

[8] Liu Y, Geng C, Lin Q, et al, Study on hot deformation behavior and intrinsic workability of 6063 aluminum alloys using 3D processing map, J. Alloys Comp. 713 (2017) 212-221.

DOI: 10.1016/j.jallcom.2017.04.156

[9] Wu H, Wen S P, Huang H, et al, Hot deformation behavior and processing map of a new type Al-Zn-Mg-Er-Zr alloy, J. Alloys Comp. 685 (2016) 869-880.

DOI: 10.1016/j.jallcom.2016.06.254

[10] Mirzadeh H, Najafizadeh A, Flow stress prediction at hot working conditions, J. Mater. Sci. Eng. A. 527(4–5) (2010) 1160-1164.

DOI: 10.1016/j.msea.2009.09.060

[11] Zener C, Hollomon J H, Effect of Strain Rate Upon Plastic Flow of Steel, J. Appl. Phys. 15(1) (1944) 22-32.

DOI: 10.1063/1.1707363

[12] Chen W, Guan Y P, Wang Z H, Hot deformation behavior of high Ti 6061 Al alloy, J. Trans, Nonferrous Met. Soc. China. 26(2) (2016) 369-377.

DOI: 10.1016/s1003-6326(16)64129-8