AZ31镁合金无缝管挤压动态再结晶数值模拟研究

doi:10.3976/j.issn.1002-4026.2017.05.008

Abstract

Abstract:

Based on the stressstrain curves obtained by hot compression tests at temperature of 300 ~ 450 ℃ and at strain rate of 0.01 ~ 1 s-1, the empirical dynamic recrystallization models for the semicontinuous AZ31 magnesium alloy were developed. The model was applied to the numerical simulation of dynamic recrystallization evolution during seamless tube extrusion of AZ31 magnesium alloy, and was verified by metallographic observation. The results showed that, at certain extrusion speed, the influence of the extruding temperature on the dynamic recrystallization fraction was the most significant. With the increase of the extruding temperature, the volume fraction of dynamic recrystallization increased obviously. The predicted volume fraction of dynamic recrystallization was in excellent agreement with the experimental results.

Key words: AZ31 magnesium alloy, seamless tube extrusion, dynamic recrystallization, numerical simulation

CLC Number:

TG146.2

ZHUANG Hai-hua，YANG Zhu，LIU Yun-teng，ZHOU Ji-xue, MA Bai-chang, WANG Jin-wei. Numerical simulation study on dynamic recrystallization of AZ31 magnesium alloy during seamless tube extrusion[J].SHANDONG SCIENCE, 2017, 30(5): 45-49.

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Numerical simulation study on dynamic recrystallization of AZ31 magnesium alloy during seamless tube extrusion

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