Simultaneously Improving Strength and Plasticity of Al-Cu Alloy by Introducing Spherical Precipitates

被引：0
作者：
Wang, Xuanyi [1 ,2 ]
Hou, Jiapeng [1 ,2 ]
Gong, Baishan [1 ,2 ]
Qu, Zhan [1 ,2 ]
Liu, Hanzhong [1 ]
Wang, Qiang [3 ]
Zhang, Zhenjun [1 ,2 ]
Zhang, Zhefeng [1 ,2 ,4 ,5 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
[3] Liaoning Univ, Coll Light Ind, Shenyang 110036, Peoples R China
[4] Northeastern Univ, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Shenyang 110819, Peoples R China
[5] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
来源：
ADVANCED ENGINEERING MATERIALS | 2024年 / 26卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Al-Cu alloys; Al-Cu-Zr-Sc alloys; plasticity; precipitates design; strength; CORROSION-RESISTANCE; SC; MICROSTRUCTURE; SEGREGATION; PHYSICS;
D O I：
10.1002/adem.202301575
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The trade-off relation between strength and plasticity is the bottleneck that limits the development of high-strength and high-plasticity Al-Cu alloys. Inspired from the influence of precipitate shape on the work-hardening behavior of Al-Cu alloys, an Al-Cu-Zr-Sc alloy containing a mixed microstructure of spherical-shaped Al3(Zr, Sc) phases and disk-shaped theta ' phases is successfully designed and fabricated. Surprisingly, it is found that the strength and plasticity of the Al-Cu-Zr-Sc alloy are synchronously improved compared to the Al-Cu alloy with only disk-shaped theta ' phases. The introduction of spherical-shaped Al3(Zr, Sc) phases can increase the yield strength without sacrificing the work-hardening ability of the Al-Cu-Zr-Sc alloy, which is mainly attributed to the extremely small strain-hardening exponent of the Al alloy with spherical-shaped precipitates. Besides, the predicted strength-elongation relation of the Al-Cu alloy is established based on the exponential strain-hardening model. An Al-Cu-Zr-Sc alloy containing a mixed microstructure of spherical-shaped Al3(Zr, Sc) phases and disk-shaped theta ' phases is fabricated, which shows a simultaneous improvement of strength and plasticity as compared with the Al-Cu alloy with only disk-shaped theta ' phases. Furthermore, based on the exponential strain-hardening model, the quantitative strength-uniform elongation relations of the Al-Cu alloy and the Al-Cu-Zr-Sc alloy are established.image (c) 2023 WILEY-VCH GmbH
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页数：7
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