Dislocation evolution and induced precipitation on corrosion resistance of a novel Al-Mg-Zn-Er-Zr alloy during hot compression

被引：13

作者：

Xue, Da ^{[1
]}

Wei, Wu ^{[1
]}

Shi, Wei ^{[2
]}

Zhou, Xiao-Rong ^{[3
]}

Wen, Sheng-Ping ^{[1
]}

Wu, Xiao-Lan ^{[1
]}

Gao, Kun-Yuan ^{[1
]}

Rong, Li ^{[1
]}

Qi, Peng ^{[1
]}

Huang, Hui ^{[1
]}

Nie, Zuo-Ren ^{[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 9PL, England

来源：

RARE METALS | 2023年 / 42卷 / 07期

关键词：

Al-Mg-Zn-Er-Zr alloy; Dislocation; Corrosion; Mg-32(AlZn)(49) phase; Molecular dynamics; RECRYSTALLIZATION BEHAVIOR; MICROSTRUCTURE; DEFORMATION; STRENGTH;

D O I：

10.1007/s12598-022-02258-w

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al-Mg-Zn-Er-Zr alloy was compressed in temperature range from 300 to 500 degrees C to investigate the microstructure evolution. Molecular dynamics simulations were used to study the mechanical behavior and dislocation evolution. The results showed that mobile dislocations are widely distributed in alloys and make important contributions to coordinate compressive deformation. The sessile dislocations hinder the deformation, and the content is about 1/20 of that of mobile dislocations. Continuous dynamic recrystallization (CDRX) is considered to be the main recrystallization mechanism. The accumulation of dislocations can provide element diffusion channels and driving force for tau (Mg-32[Al, Zn](49)) phase precipitation, resulting in the forced precipitation of discontinuous tau phase to replace the continuous b phase (Al3Mg2), which reduces the corrosion potential, resulting in increased corrosion resistance.

引用

页码：2371 / 2380

页数：10

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