文献类型：期刊文献

中文题名：热轧MB26镁合金微观组织和力学性能研究

英文题名：Study on Microstructure and Mechanical Properties of Hot-rolling MB26 Alloy

作者：冯文涛[1];张修庆[1];李伟[1];马春江[1]

机构：[1]华东理工大学承压系统安全科学教育部重点实验室机械与动力工程学院,上海200237

年份：2009

卷号：38

期号：12

起止页码：15

中文期刊名：热加工工艺

外文期刊名：Hot Working Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：上海市重点学科建设项目资助(B503)

语种：中文

中文关键词：MB26镁合金;热轧;力学性能;微观组织

外文关键词：MB26 magnesium alloy; hot-rolling; mechanical properties; microstructure

摘要：在420℃时,对MB26镁合金进行4道次、2道次不同压下率的热轧,观察热轧后合金的微观组织,并测试合金的力学性能。结果表明,随着轧制道次变形量的增大,轧制应变速率增加,镁合金发生了动态再结晶,从而获得细小的晶粒组织。热轧后,合金的强度较挤压态均得到提高,但伸长率有所下降。轧制2道次后显示出更好的力学性能,其拉伸断口存在许多深且均匀的韧窝,属于韧性断裂。
The microstructure and mechanical properties of MB26 alloy rolled by 4 passes and 2 passes reduction rate at 420℃ were studied. The results show that, with the increase of rolling pass deformation, the strain rate improves and a dynamic recrystallization occurs, which results in the grain refining. The strength of hot-rolled MB26 alloy increases, but the elongation decreases compared with extruded state. MB26 alloy after 2 passes rolling shows excellent mechanical properties. There are many deep dimples in the fracture of MB26 alloy, and those dimples distribute well. So the fracture method of MB26 alloy is ductile rupture.