Synergistic mechanism of hetero-structured Al-Mg-Si-Cu-Zn-Fe-Mn alloys with greatly enhanced strength, ductility and formability

被引：4
作者：
Chen, Xiangyang [1 ]
Guo, Mingxing [1 ,3 ]
Du, Jinqing [1 ]
Zhuang, Linzhong [2 ,3 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China
[3] Univ Sci & Technol Beijing, Beijing Lab Met Mat & Proc Modern Transportat, Beijing 100083, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 910卷
基金：
中国国家自然科学基金;
关键词：
Al -Mg -Si -Cu -Zn alloy; Heterogeneous structure; Synergistic action; Mechanism; BAKE-HARDENING RESPONSE; BIMODAL GRAIN-SIZE; PRECIPITATION BEHAVIORS; MULTISCALE PARTICLES; MICROSTRUCTURE; GRADIENT; TEXTURE; DESIGN; SC;
D O I：
10.1016/j.msea.2024.146893
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Al-Mg-Si alloy sheets applied in automobile industry are required to possess good formability, high strength and ductility. Herein, our results show that a heterogeneous cellular microstructure, i.e., soft domains embedded in hard domains, can be readily attained via a short -flow processing route with concomitant improvement in the strength (YS: 177-184 MPa, UTS: 317-328 MPa), elongation (25.7%-27.3 %) and formability ( r = 0.771, Delta r = 0.047) of pre-aged alloy. The distribution of recrystallization grains, texture and coupled soft/hard domains in the Al-Mg-Si-Cu-Zn-Fe-Mn alloys and the effect on mechanical properties have been investigated. Moreover, the formation and synergistic action mechanisms of coupled soft/hard domains were put forward in this work.
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页数：6
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