Dynamic recrystallization during hot torsion of Al-9Mg alloy

作     者：林均品 程荆卫 

作者机构：北京科技大学 新金属材料国家重点实验室 北京 北京理工大学 北京 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：1999年第9卷第4期

页      面：799-805页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Al-9Mg alloy dynamic recrystallization torsion stacking faults 

摘      要：Specimens of single phase Al-9Mg alloy have been deformed by hot torsion at 300 -450 °C and strain rates of 0.005-1.587s-1 to true strain of 5.5 followed by water quenching immediately. The dynamic restoration mechanisms during hot torsion were examined by the true stress-true strain curves, optical and electron microscopy. It has been shown that dynamic recrystallization occurs and the dynamic recrystallization behaviour is similar to that of those materials with a low stacking fault energy. The microstructural observations indicate that a large number of dislocations appear in a certain crystallographic orientation in the dynamically recrystallized grains. High resolution streak images show that the very fine regions of stacking faults exist in the matrix of Al-9Mg alloy.