Superplastic Behavior and Constitutive Equation of AZ31B Magnesium Alloy

Abstract:

To study the superplasticity of AZ31B magnesium alloy, hot compression tests were performed in forming temperature range from 280°C to 440°C and strain rate range from 0.001s-1 to 0.1s-1. The influence of deformation strain rate and forming temperature on flow stress was also analyzed detailed. It was shown that the flow stress of AZ31B was very sensitive to formpng temperature and stain rate, and was decreased with deformation temperature increasing, and was increased with stain rate increasing. However, no significant change of flow stress was observed at the temperature of 440°C and the strain rate below 0.01s-1. The activation energy of AZ31B in superplastic deformation was 141.6KJ•mol-1 and its constitutive equation was established also.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 1689-1692
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.1689
• Online since: October 2011
• Authors: Fu Xiao Chen, Xiang Zhen Chen, Fu Tao Sun
• Keywords: Activation Energy, AZ31B Magnesium Alloy, Constitutive Equation, Superplasticity

References

[1] Wenxian Li. Magnesium and magnesium alloy. 2005:1-17.

[2] Jiuxin Ye. Journal of Hunan University(Naturnal Science). Vol. 29(2002): p.112.

[3] Shihong Zhang. Metal Forming Technology. Vol. 21(2002) : p.1.

[4] H. Somekawa, M. Konzu, S. Tanabe, K. Higashi. Mater. Sci. Forum. Vol. 350 (2000): p.177.

[5] Lee S, Chen Y H, Wang J Y. Journal of Materials Processing Technology, 2002, 124(1-2): p.19.

[6] Zhenhua Chen. Chemical Industry and Engineering Progress. Vol. 25(2006): p.140.

[7] Sheppard T, Parson N C, Zaidi M A. Mater. Sci. Vol. 17(1983): p.481.

[8] Z.Q. Sheng, R. Shivpur. Materials Science and Engineering, A419 (2006): p.202.

[9] Sellars C M. Materials Science and technology. 1990, 6: p.1072.

[10] Milovic R, Manojlovic D, Andjelic M. Steel Research. Vol. 63(1992): p.78.