文献类型：期刊文献

中文题名：预变形AZ60镁合金低温退火过程中的组织及力学行为演变

英文题名：Evolution of microstructure and mechanical behavior of pre deformed AZ60 magnesium alloy during low temperature annealing

作者：何杰军 吴鲁淑 杨江

机构：[1]贵州理工学院材料与能源工程学院,贵州贵阳550003;[2]贵州理工学院机械工程学院,贵州贵阳550003

第一机构：贵州理工学院材料与能源工程学院

年份：2021

卷号：42

期号：10

起止页码：42-48

中文期刊名：材料热处理学报

外文期刊名：Transactions of Materials and Heat Treatment

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：贵州省科学技术基金项目([2019]1141)。

语种：中文

中文关键词：镁合金;孪生;第二相;力学性能

外文关键词：magnesium alloys;twinning;the second phase;mechanical property

摘要：对合金材料来说,退火之后是软化还是硬化,对后续加工工艺的制定有重要影响。为了研究挤压态AZ60镁合金在变形前后的退火力学行为,对其分别进行没有经预先塑性变形和存在预先塑性变形的175℃低温退火处理,研究塑性变形和低温退火对合金组织和力学性能的影响。结果表明:没有经预先塑性变形的挤压态AZ60镁合金,175℃退火处理对其力学性能没有明显的影响。当合金沿着挤压方向预先压缩,产生了{1012}孪晶,之后再进行175℃低温退火时,第二相Al_(12)Mg_(17)在晶界、孪晶界以及孪晶内析出,在随后的变形中阻碍了位错运动和孪晶的长大,显著地提高了合金的屈服强度。
For alloy materials,whether it is softened or hardened after annealing has an important influence on the formulation of subsequent processing process.In order to study the annealing mechanical behavior of extruded AZ60 magnesium alloy before and after deformation,175℃annealing treatment of the alloy without and with pre plastic deformation was carried out respectively,and the effects of plastic deformation and low temperature annealing on microstructure and mechanical properties of the alloy were studied.The results show that the mechanical properties of the AZ60 magnesium alloy without pre plastic deformation are not affected by annealing at 175℃.When the alloy is precompressed along the extrusion direction,the twin of{1012}is produced,and then annealed at 175℃,the second phase Al_(12) Mg_(17) precipitates in the grain boundary,twin boundary and twin,which hinders dislocation movement and twin growth in the subsequent deformation,and improves the yield strength of the alloy significantly.