摘要
利用偏振光金相和透射电子显微镜研究了Al－2％Mg，Al－6％Mg和Al－9％Mg合金热形变过程中的动态再结晶行为．结果表明：Al-2％Mg和Al-6％Mg合金的动态再结晶是在一定的Z参数范围内发生的，而Al－9％Mg合金的动态再结晶行为与低层错能材料相似．Mg含量增加促进了该合金动态再结晶的发生，原因是Mg原子气团阻碍位错的交滑移，使动态回复难以发生．
Dynamic recrystallization behaviours of Al-Mg alloys during hot deforma-tion are investigated by means of polarized light microscopy and electron microscopy.The results show that dynamic recrystallization taks place in a certain range of parameterZ in Al-2Mg and Al-6Mg alloys and dynamic recrystallization behaviour of Al-9Mg alloyis similar to those materials having a lower stacking fault energy. Dynamic recrystalliza-tion is accelerated by increasing Mg content, which results from that Mg atmospheresimpede cross slip of dislocation, so that dynamic recovery is difficult to cccur.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1997年第1期47-51,共5页
Journal of University of Science and Technology Beijing
