Improvement in the mechanical properties and creep resistance of Al-Mn-Mg 3004 alloy with Sc and Zr addition

被引：53

作者：

Li, Zhen ^{[1
]}

Zhang, Zhan ^{[1
]}

Chen, X-Grant ^{[1
]}

机构：

[1] Univ Quebec Chicoutimi, Dept Appl Sci, Saguenay, PQ G7H 2B1, Canada

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 729卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Al-Mn-Mg; 3004; alloy; alpha-Al(Mn; Fe)Si dispersoids; Al-3(Sc; Zr); precipitates; Microstructure evolution; Mechanical properties; Creep resistance; METAL-MATRIX COMPOSITES; STRENGTHENING MECHANISMS; ELEVATED-TEMPERATURES; TEMPORAL EVOLUTION; AL(SC; ZR); ALLOYS; 3XXX ALLOYS; PRECIPITATION; MICROSTRUCTURE; DISPERSOIDS; AL3SC;

D O I：

10.1016/j.msea.2018.05.055

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Sc and Zr were added to Al-Mn-Mg 3004 alloy to form two populations of strengthening particles (50-70 nm-sized alpha-Al(Mn,Fe)Si dispersoids and 6-8 nm-sized Al-3(Sc,Zr) precipitates), and their strengthening effects on the mechanical properties and creep resistance at ambient and elevated temperatures were studied. The results showed that the microhardness and yield strength at ambient temperature greatly increased upon the addition of Sc and Zr. The creep resistance at 300 degrees C significantly improved due to the precipitation of fine Al-3(Sc,Zr) particles and reduction of the particle-free zone. However, the yield strength at 300 degrees C remained constant even though the Sc and Zr content increased. The combined effects of alpha-Al(Mn,Fe)Si dispersoids and Al-3(Sc,Zr) precipitates on the yield strengths at 25 degrees C and 300 degrees C were quantitatively analyzed based on the Orowan bypass and dislocation climb mechanisms. The analytically predicted yield strengths are in good agreement with the experimental data.

引用

页码：196 / 207

页数：12

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