李忠盛,吴护林,潘复生,陈韵如,张隆平

• 1:重庆大学材料科学与工程学院
• 2:中国兵器工业第五九研究所
• 3:重庆理工大学图书馆

摘要(Abstract)：

采用Gleeble-1500热模拟机进行恒温和恒速压缩变形实验,变形温度为300～450℃和应变速率为0.001～1 s-1,研究了新型Al-Zn-Mg-Cu合金的高温塑性变形行为,并根据动态材料模型(DMM)建立了合金的加工图。结果表明,合金高温压缩变形均存在稳态流变特征且属于正应变速率敏感材料;在实验范围内,变形温度450℃、应变速率0.001 s-1的高温低应变速率变形区域的功率散耗率最大,约为0.61;合金热变形的最佳工艺参数为:热加工温度390～410℃,应变速率0.018～0.135 s-1。

关键词(KeyWords)： Al-Zn-Mg-Cu合金;热变形;加工图;流变应力

Abstract:

Keywords:

基金项目(Foundation): 总装预研项目(51312050107);; 重庆市科技攻关计划项目(2009AC4015)

作者(Author): 李忠盛,吴护林,潘复生,陈韵如,张隆平

DOI: 10.13289/j.issn.1009-6264.2011.10.008

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