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7A52铝合金热加工过程中高温压缩变形行为
引用本文:方家芳,尹志民,黄继武,聂波,王涛,单长智.7A52铝合金热加工过程中高温压缩变形行为[J].轻合金加工技术,2006,34(5):48-52.
作者姓名:方家芳  尹志民  黄继武  聂波  王涛  单长智
作者单位:1. 中南大学,材料学院,湖南,长沙,410083
2. 中南大学,材料学院,湖南,长沙,410083;东北轻合金有限责任公司,黑龙江,哈尔滨,150060
3. 东北轻合金有限责任公司,黑龙江,哈尔滨,150060
摘    要:采用圆柱试样在Gleeble-1500热模拟机上进行高温压缩变形模拟实验,研究了7A52铝合金在高温塑性变形过程中流变行为。实验结果表明,合金高温压缩变形时的流变应力随变形温度的升高而减小,随变形速率的提高而增大。热变形条件下流变应力σ、应变速率ε.和变形温度T之间满足一定的关系式。研究指出,合金适宜的热加工温度为400℃~420℃。

关 键 词:7A52铝合金  热压缩变形  流变应力  本构方程
文章编号:1007-7235(2006)05-0048-05
收稿时间:2006-02-05
修稿时间:2006年2月5日

Study of high temperature flow behavior of 7A52 aluminum alloy
FANG Jia-fang,YIN Zhi-min,HUANG Ji-wu,NIE Bo,WANG Tao,SHAN Chang-zhi.Study of high temperature flow behavior of 7A52 aluminum alloy[J].Light Alloy Fabrication Technology,2006,34(5):48-52.
Authors:FANG Jia-fang  YIN Zhi-min  HUANG Ji-wu  NIE Bo  WANG Tao  SHAN Chang-zhi
Affiliation:1.School of Material Science and Technology, Central South University, Changsha 410083,China; 2. Northeast Light Alloy Co., Ltd., Harbin 150060, China
Abstract:The high temperature flow behavior of 7A52 aluminum alloy during high temperature plastic deformation was studied by isothermal compression of cylindrical specimens using Gleeble-1500 thermal simulation machine. The results show that the flow stress decreases with the increase of deformation temperature and increases with the increase of strain rate. The flow stress equation of 7A52 alloy during temperature deformation can be represented by a formula. The better hot deformation processing can be designed at 400% - 420%.
Keywords:7A52 aluminum alloy  hot compression deformation  flow stress  constitutive equation
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