文献类型：期刊文献

英文题名：Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and Aging

作者：He, Jiejun Wu, Lushu

第一作者：何杰军

通信作者：He, JJ[1]|[1444053a3247f96f2357f]何杰军;

机构：[1]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[2]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2022

卷号：15

期号：8

外文期刊名：MATERIALS

收录：;EI(收录号：20221712029149);Scopus(收录号：2-s2.0-85128635488);WOS:【SCI-EXPANDED(收录号:WOS:000786716700001)】；

基金：This work was supported by the National Natural Science Foundation of China (51501045) and Natural Science Foundation of Guizhou Province ([2019]1141).

语种：英文

外文关键词：magnesium alloys; aging; precipitate; strengthening

摘要：An obvious strengthening phenomenon has been observed in the Mg-6Al-1Zn (AZ61) alloy after simultaneous loading and aging at 170 degrees C. Being different to aging after pre-strain, the simultaneous loading and aging can obviously increase the yield stress of the alloy. Microstructural analysis shows that a larger quantity of the Al12Mg17 can be obtained by simultaneous loading and aging in a relatively short aging time, compared with aging after pre-strain. It is speculated that the loading during aging is more beneficial for nucleation of the precipitates. In the same aging time, it is found that the sample subjected to simultaneous loading and aging shows a higher yield stress than the sample aged after pre-strain. To extend aging time, a large quantity of Al12Mg17 can be obtained in the pre-strained sample. However, it is demonstrated that the yield stress of the sample subjected to aging after pre-strain is lower than that of the sample subjected to simultaneous loading and aging, despite these two samples containing the same quantity of precipitates. It is speculated that the occurrence of the precipitates plays a role in preventing dislocation gliding and twin expanding, thus leading to a strengthening effect. Additionally, atoms segregated in twin boundaries may partly strengthen the material. It is found that a large quantity of precipitates can be obtained in a relatively short aging time by using the simultaneous loading and aging, reducing the softening effect caused by aging. The observed phenomenon may provide a new strategy for strengthening magnesium alloys.