Effect of aging treatment on phase evolution and mechanical properties of selective laser melted Al-Mg-Er-Zr alloy

被引：5

作者：

Guo, Yanwu ^{[1
]}

Wei, Wu ^{[1
]}

Shi, Wei ^{[2
]}

Zhou, Xiaorong ^{[3
]}

Huang, Hui ^{[1
]}

Wen, Shengping ^{[1
]}

Wu, Xiaolan ^{[1
]}

Gao, Kunyuan ^{[1
]}

Rong, Li ^{[1
]}

Qi, Peng ^{[1
]}

Nie, Zuoren ^{[1
]}

机构：

[1] Beijing Univ Technol, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China

[2] Inst Corros Sci & Technol, Guangzhou 510530, Peoples R China

[3] Univ Manchester, Dept Mat, Manchester M13, Lancashire, England

来源：

MATERIALS LETTERS | 2022年 / 327卷

关键词：

Additive manufacturing; Metals and alloys; Selective laser melting; Synergistic precipitation; Mechanical properties; MICROSTRUCTURE; BEHAVIOR;

D O I：

10.1016/j.matlet.2022.133001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Er and Zr modified Al-Mg alloy was manufactured by selective laser melting. The effect of aging treatment on phase evolution and mechanical properties of alloy has been studied. The results show that bimodal grain structures (2.8 +/- 1.1 mu m) could be obtained, thanks to the Al3Zr primary phases promoting the formation of equiaxed grains (0.8 +/- 0.3 mu m) at the boundary of molten pool. During the aging of 375 degrees C, Al3(Er,Zr) particles with the size of 2-5 nm were produced via synergistic precipitation of Er and Zr, which would greatly improve the strength and reach 510 +/- 9 MPa. At the same time, the Mg-rich phase was dissolved, the Mn-rich phase was precipitated, and dislocations could accelerate the diffusion of solute atoms during the evolution of the phases.

引用

页数：4

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