Achieving ultra-high strength using densely ultra-fine LPSO phase

被引：3

作者：

Changzheng Li ^{[1
]}

Huan Liu ^{[2
]}

Yunchang Xin ^{[3
]}

Bo Guan ^{[1
]}

Guangjie Huang ^{[1
]}

Peidong Wu ^{[4
]}

Qing Liu ^{[3
]}

机构：

[1] International Joint Laboratory for Light Alloys, College of Materials Science and Engineering, Chongqing University

[2] College of Mechanics and Materials, Hohai University

[3] Key Laboratory for Light-weight Materials, Nanjing Tech University

[4] Department of Mechanical Engineering, McMaster University

来源：

Journal of Materials Science & Technology | 2022年 / 129卷 / 34期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

TG146.22 [];

学科分类号：

080502 ;

摘要：

Long period stacking ordered(LPSO) structures are an effective strengthening phase in Mg alloys.However,the coarse LPSO phases in as-cast alloys are very difficult to refine,and they dramatically reduce the strengthening effect.In the present study,friction stir processing(FSP) was employed to refine the structure of an Mg-12.8 Y-4.7 Zn(wt%) alloy with a very high content of coarse LPSO phases.An optimized FSP regime refined the coarse LPSO phases into densely ultrafine blocks with an average width of ～200 nm and an average length of～1 μm.An ultrahigh yield strength of ～800 MPa was achieved under compression of the FSP region.Theoretical calculations indicated that the strengthening by the densely ultrafine LPSO phases was up to approximately 630 MPa.

引用

页码：135 / 138

页数：4

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