Micro-alloying effect of Er and Zr on microstructural evolution and yield strength of Al-3Cu (wt.%) binary alloys

被引：41

作者：

Pan, Shiwei ^{[1
]}

Chen, Xiaohua ^{[1
]}

Zhou, Xianglin ^{[1
]}

Wang, Zidong ^{[2
]}

Chen, Kaixuan ^{[2
]}

Cao, Yudong ^{[3
]}

Lu, Feng ^{[4
]}

Li, Shaohua ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[3] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[4] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 790卷 / 790期

关键词：

Aluminum alloy; Erbium; Precipitation; Recrystallization; Yield strength; AL-CU ALLOYS; MG-AG ALLOY; MECHANICAL-PROPERTIES; COARSENING RESISTANCE; DISPERSOID PRECIPITATION; SOLUTE SEGREGATION; FRACTURE-BEHAVIOR; CREEP RESISTANCE; SC; ZIRCONIUM;

D O I：

10.1016/j.msea.2020.139391

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present study, a textbook binary model alloy Al-3Cu (wt.%) was chosen as base alloy and micro-alloying effect with different Er and Zr contents was examined. A two-steps homogenization regime was optimized as 450 degrees C/3 h + 490 degrees C/20 h. The precipitation and recrystallization behaviors are characterized using transmission electron microscopy (TEM) and electron backscattered diffraction (EBSD) techniques. It is found that recrystallization behavior at 500 degrees C was fully inhibited with co-additions of Er and Zr. Heterogeneous nucleation of refined theta' phases on core-shell Al-3(Er,Zr) dispersoids was firstly observed. In addition, strengthening contribution from the L1(2) dispersoids and precipitates were detailed discussed. The refinement of theta' to 96.6 nm (average diameter) in Al-Cu-Er-Zr can compensate the reduction of nucleation driving force due to the loss of Cu solute atoms resulted from Al8Cu4Er primary phase.

引用

页数：16

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