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7050铝合金热压缩变形的流变应力本构方程 被引量:57

Flow Stress Constitutive Equation of 7050 Aluminum Alloy During Hot Compression
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摘要 对7050铝合金在应变速率为0.01-10s-1、变形温度为250-450℃条件下的流变应力行为进行了实验研究。结果表明:7050铝合金热压缩变形中发生了明显的动态回复与动态再结晶,流变应力随应变速率的增加而增加,随温度的增加而降低;通过线性回归分析计算出7050材料的应变硬化指数n以及变形激活能Q,获得了7050铝合金高温条件下的流变应力本构方程。 The flow stress behavior of 7050 aluminum alloy was investigated in the temperature range of 250-450℃ and strain rate of 0.01-10s^-1. The results showed that dynamic recovery, and dynamic recrystallization occured obviously during hot compression of 7050 aluminum alloy. The flow stress increased with increasing strain rates and decreased with increasing temperature. The strain hardening coefficient n and deformation activation energy Q were evaluated by linear regression analysis. And the flow stress constitutive equation of 7050 aluminum alloy during hot compression was obtained.
出处 《材料工程》 EI CAS CSCD 北大核心 2007年第4期20-22,26,共4页 Journal of Materials Engineering
基金 国家973计划资助项目(2005CB724105)
关键词 7050铝合金 热压缩变形 本构方程 流变应力 7050 aluminum alloy hot compression constitutive equation flow stress
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