Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates

doi:10.1016/j.matdes.2024.113439

IMR OpenIR

	Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates
	Dai, Renjie 1,2; Zhang, Zhenjun 2,3; Li, Keqiang 4; Liu, Rui 2,3; Hou, Jiapeng 2,3; Qu, Zhan 2,3; Gong, Baishan 2; Zhang, Zhefeng 2,3
通讯作者	Zhang, Zhenjun(zjzhang@imr.ac.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn)
	2024-12-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	248 页码:9
摘要	Strength and plasticity are basic mechanical properties for wrought Al alloys, and generally exhibit a trade-off relationship. Herein through analyzing the respective effects of precipitates on yield strength and strain hardening, we proposed and quantitatively analyzed a strategy for synchronously strengthening and plasticizing Al alloys by refining and densifying the precipitates, defined as RDP effect. The precipitates were highly refined and densified in three high-Zn 7xxx alloys in order to verify the validity of the RDP effect. The tensile tests show that the high-Zn Al alloys possess ultra-high strength and good plasticity compared to the traditional Al alloys. Further analysis reveals that the densification of precipitates mainly contributes to the ultra-high strength, accounting for over 75%, while the refinement of precipitates suppresses the dislocation annihilation, thus increasing the strain-hardening capacity. Together, these two factors finally contribute to the excellent strength and plasticity matching. This finding will provide strong support for the positive impact of RDP effect on improving the balance between strength and ductility. Besides, this strategy may be considered as an effective one for simultaneously improving the strength and plasticity in high-performance Al alloys.
关键词	Aluminum alloy Strength and plasticity Precipitates Strain-hardening Dislocation annihilation
资助者	National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association CAS ; Chinese Academy of Sciences (CAS) ; IMR Innovation Fund
DOI	10.1016/j.matdes.2024.113439
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[52322105] ; National Natural Science Foundation of China (NSFC)[52271121] ; National Natural Science Foundation of China (NSFC)[52321001] ; National Natural Science Foundation of China (NSFC)[52130002] ; National Natural Science Foundation of China (NSFC)[U22A20114] ; National Natural Science Foundation of China (NSFC)[52301177] ; Youth Innovation Promotion Association CAS[2021192] ; Chinese Academy of Sciences (CAS)[174321KYSB20210002] ; IMR Innovation Fund[2023-ZD01]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001361578400001
出版者	ELSEVIER SCI LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191801
专题	中国科学院金属研究所
通讯作者	Zhang, Zhenjun; Zhang, Zhefeng
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Zhejiang Univ, ZJU Hangzhou Global Sci & Technol Innovat Ctr, Hangzhou 311215, Peoples R China
推荐引用方式 GB/T 7714	Dai, Renjie,Zhang, Zhenjun,Li, Keqiang,et al. Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates[J]. MATERIALS & DESIGN,2024,248:9.
APA	Dai, Renjie.,Zhang, Zhenjun.,Li, Keqiang.,Liu, Rui.,Hou, Jiapeng.,...&Zhang, Zhefeng.(2024).Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates.MATERIALS & DESIGN,248,9.
MLA	Dai, Renjie,et al."Achieving excellent strength and plasticity of aluminum alloy through refining and densifying precipitates".MATERIALS & DESIGN 248(2024):9.