Hot Deformation Behavior and Microstructural Evolution of Pure Aluminum

Li Huizhong1; Liang Xiaopeng1; Chen Jianmei1; Liu Chuming2

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Hot Deformation Behavior and Microstructural Evolution of Pure Aluminum
Vol. 29, Issue 1, Pages: 88-90(2009)
Published： 2009 ，
DOI：

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[1]李慧中,梁霄鹏,陈健美,刘楚明.工业纯铝的热变形组织演化[J].特种铸造及有色合金,2009,29(01):88-90+16.

Li Huizhong1, Liang Xiaopeng1, Chen Jianmei1, et al. Hot Deformation Behavior and Microstructural Evolution of Pure Aluminum. [J]. Special Casting & Nonferrous Alloys 29(1):88-90(2009)
[1]李慧中,梁霄鹏,陈健美,刘楚明.工业纯铝的热变形组织演化[J].特种铸造及有色合金,2009,29(01):88-90+16. DOI：

Li Huizhong1, Liang Xiaopeng1, Chen Jianmei1, et al. Hot Deformation Behavior and Microstructural Evolution of Pure Aluminum. [J]. Special Casting & Nonferrous Alloys 29(1):88-90(2009) DOI：

摘要

采用Gleeble-1500热模拟机研究了工业纯铝高温压缩变形的组织演化行为

采用光学显微镜及透射电镜研究了纯铝在不同压缩变形条件下的组织形貌特征。结果表明

在应变速率为10-2s-1

变形温度为220、300℃时

真应力-真应变曲线呈稳态特征

材料发生了动态回复;当变形温度大于380℃时

材料发生了动态再结晶;在变形温度为460℃时

应变速率为10-3～1s-1条件下变形时发生了动态再结晶;动态再结晶机制主要是连续动态再结晶

同时有少量表现为几何动态再结晶。

Abstract

Microstructural evolution of a commercial pure aluminum during hot compression at elevated temperatures was observed by OM （optical microscope） and TEM （transmission electron microscope） with Gleeble-1500 dynamic materials testing machine at different compression rates. The results indicate that true stress-true strain curves are characterized by steady state with a strain rate of 0.01 s-1 at 220℃ and 300℃

exhibiting occurrence of dynamic recovery

while occurrence of dynamic recrystallization in the pure aluminum can be observed at temperature more than 380℃. Furthermore

dynamic recrystallization occurs in the pure aluminum with a strain rate of 0.001

s-1 and at 460℃. Dynamic recrystallization mechanism is characterized by continuous dynamic recrystallization and geometric dynamic recrystallization.