摘要
采用硬度测量、透射电镜和X射线衍射等试验方法,探讨了在室温不同强塑性变形下A l-Zn-Mg-Cu、A l-Cu、A l-Mg-Si三种铝合金时效析出相的演变。结果表明,强烈塑性变形能引起绝大部分析出相产生室温回溶,形成过饱和固溶体;每种析出相再溶解的次序不同,先驱相(如GP区、亚稳相)回溶所属的变形程度小于稳定相。
The re-dissolution of precipitation phases of Al-Zn-Mg-Cu, Al-Cu and Al-Mg-Si alloys at room temperature caused by severe compressed deformation was researched by hardness measurement, X-ray diffraction analysis and transmission electron microscopy. The results show that supersaturated solid solutions are formed after re-dissolution of precipitated phases induced by drastically deformation at room temperature, moreover, the deformation extents of initial re-dissolution all are different owing to various precipitates . The re-dissolution of precursor phases （such as GP zone ,metastable phases） is easier than that of equilibrium phases , and their deformed extent needed by re-dissolution is smaller.
出处
《金属热处理》
CAS
CSCD
北大核心
2006年第8期56-59,共4页
Heat Treatment of Metals
基金
国家自然科学基金资助项目(50571069)
湖南省自然科学基金资助项目(05JJ40005)
关键词
强塑性变形
回溶
回归
铝合金
时效
析出
severe plastical deformation （SPD）
re-dissolution
retrogression
aluminum alloy
aging
precipitation
