陈贵清,傅高升,程超增,颜文煅,邹则昌,林绍义

• 1:福州大学材料科学与工程学院
• 2:福建船政交通职业学院机械工程系

摘要(Abstract)：

采用Gleeble-1500热模拟试验机对3003铝合金进行变形温度为400℃,应变速率为0.01～10.0 s-1的等温压缩实验,获得热变形过程中的真应力-真应变曲线。结果表明:应变速率ε≥1.0 s-1时,实际变形温度高于预设温度,产生变形热效应。合金发生动态再结晶的临界应变随着应变速率的升高而增加,在较高应变速率条件下(ε≥1.0 s-1),流变应力曲线出现锯齿形波动,合金发生了不连续动态再结晶。利用光学显微镜和透射电镜分析了应变速率对3003铝合金热变形组织演变的影响。结果表明:应变速率越小,合金越容易发生动态再结晶,当应变速率为10.0 s-1时,由于变形热效应的作用,合金也发生了动态再结晶。低应变速率(ε≤0.1 s-1)条件下,提高应变速率可以明显细化晶粒,并且在相同应变下,动态再结晶体积分数随应变速率的增大而减小,综合考虑动态再结晶晶粒的大小和组织均匀性,较佳的应变速率为0.1 s-1。

关键词(KeyWords)： 3003铝合金;应变速率;动态再结晶;热效应;组织演变

Abstract:

Keywords:

基金项目(Foundation): 福建省自然科学基金资助计划项目(E0610004);; 福建省教育厅A类科技项目(JA08249)

作者(Author): 陈贵清,傅高升,程超增,颜文煅,邹则昌,林绍义

DOI: 10.13289/j.issn.1009-6264.2012.10.008

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