刘胜胆,张新明,游江海,张小艳,张翀

• 1:中南大学材料科学与工程学院
• 2:中南大学材料科学与工程学院
• 3:中南大学材料科学与工程学院
• 4:中南大学材料科学与工程学院

摘要(Abstract)：

通过室温力学性能测试,光学显微镜、扫描电镜和透射电镜研究了淬火速率对AlZnMgCu(Zr)合金断裂行为的影响。结果表明:含Zr小于0.1%合金随着淬火速率的降低,由穿晶破断和沿晶开裂的混合型断裂逐渐转变成沿晶断裂;其主要原因是淬火速率降低使晶界无沉淀析出带(PFZ)宽化。含Zr大于等于0.1%的合金随着淬火速率的降低由穿晶破断为主的断裂逐渐转变成沿晶开裂和穿晶剪切的混合型断裂;沿晶断裂的产生主要是由于晶界无沉淀析出带宽化;穿晶剪切主要是由于慢速淬火过程中晶粒内部析出了大量粗大的η平衡相。

关键词(KeyWords)： AlZnMgCu合金;淬火速率;锆;沿晶断裂;穿晶剪切断裂

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(2005CB623700);; 国家自然科学重点基金(50230310)

作者(Author): 刘胜胆,张新明,游江海,张小艳,张翀

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