ZE42镁合金板材拉伸变形行为和热加工图

李宏凯; 李雨彤; 范明达; 王洪斌; 王忠军

doi:10.15980/j.tzzz.2019.01.022

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ZE42镁合金板材拉伸变形行为和热加工图
Tensile Deformation Behavior and Hot Processing Map of ZE42 Magnesium Alloy Sheet
2019年39卷第1期页码：79-83
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.01.022

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[1]李宏凯,李雨彤,范明达,王洪斌,王忠军.ZE42镁合金板材拉伸变形行为和热加工图[J].特种铸造及有色合金,2019,39(01):79-83.

Li Hongkai, Li Yutong, Fan Mingda, et al. Tensile Deformation Behavior and Hot Processing Map of ZE42 Magnesium Alloy Sheet[J]. Special Casting & Nonferrous Alloys, 2019,39(1):79-83.
[1]李宏凯,李雨彤,范明达,王洪斌,王忠军.ZE42镁合金板材拉伸变形行为和热加工图[J].特种铸造及有色合金,2019,39(01):79-83. DOI： 10.15980/j.tzzz.2019.01.022.

Li Hongkai, Li Yutong, Fan Mingda, et al. Tensile Deformation Behavior and Hot Processing Map of ZE42 Magnesium Alloy Sheet[J]. Special Casting & Nonferrous Alloys, 2019,39(1):79-83. DOI： 10.15980/j.tzzz.2019.01.022.

摘要

采用带有加热装置的MTS810液压伺服拉伸试验机

研究了ZE42镁合金板材的高温拉伸变形行为

应变速率的取值为0.000 3～0.17s

-1

变形温度为300～450℃

采用Z参数和材料动态模型（DMM）建立了本构方程和热加工图。结果表明

ZE42镁合金板材热拉伸变形的平均激活能值为161kJ/mol

避开加工失稳区

ZE42镁合金板材热拉伸的稳态流变温度区间和应变速率区间分别为380～440℃和0.000 3～0.01s

-1

。

Abstract

Tensile deformation behavior of ZE42 magnesium alloy at elevated temperature was investigated by MTS-810hydraulic servo tensile tester with heating at 300～450℃and 3.0×10

-4

～0.17s

-1

.Both constitutive equation and processing map were established using Zparameter and material dynamic model（DMM）.The results show that the ZE42magnesium alloy sheet can avoid the instability zone when the average activation energy of thermal tensile deformation is 161kJ/mol.The steady rheological parameters of temperature and strain rate under hot tensile condition is in range of 380～440℃and 0.000 3～0.01s

-1

respectively.