Achieving an ultra-high strength in a low alloyed Al alloy via a special structural design

doi:10.1016/j.msea.2019.03.126

IMR OpenIR

	Achieving an ultra-high strength in a low alloyed Al alloy via a special structural design
	Zeng, X. H.1,2; Xue, P.1; Wu, L. H.1; Ni, D. R.1; Xiao, B. L.1; Ma, Z. Y.1
通讯作者	Xue, P.(pxue@imr.ac.cn) ; Wu, L. H.(lhwu@imr.ac.cn)
	2019-05-07
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	755 页码:28-36
摘要	An ultrafine-grained (UFGed) low alloyed aluminum alloy (6061 Al alloy) with a special nano-sized spherical precipitate structure was achieved by friction stir processing (FSP) and post-FSP aging. The evolution of the grains and precipitates during post-FSP aging and their contribution to mechanical properties were investigated. Under a low rotation rate (200 rpm) with water cooling, the average grain size of the FSP sample was only 200 nm. The ultimate tensile strength of the UFG 6061Al alloy aged at 100 degrees C for 20 min achieved 573 MP with a high elongation of 17%. This strength was nearly 90% higher than that of 6061 Al-T6 alloy (similar to 300 MPa), and was equivalent to that of commercial 7075Al-T651 alloy (similar to 572 MPa, the typical high alloyed Al alloy). Such a good mechanical property was attributed to the good thermal stability and the accelerated precipitation of the FSP UFGed structure under the low-temperature and short-time aging conditions. Further, the contribution of various strengthening mechanisms to the total strength in post-FSP aged Al alloys was quantitatively evaluated. This work provides an effective strategy for obtaining low alloyed high-strength Al alloys, which is beneficial for reducing environmental burdens and improving long-term sustainability.
关键词	Aluminum alloys Ultrafine-grain Friction stir processing Aging Low alloyed high-strength alloys
资助者	National Natural Science Foundation of China
DOI	10.1016/j.msea.2019.03.126
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51331008] ; National Natural Science Foundation of China[U1508216] ; National Natural Science Foundation of China[51301178]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000467669000004
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/133575
专题	中国科学院金属研究所
通讯作者	Xue, P.; Wu, L. H.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Zhushou CRRC Elect Times Co Ltd, Technol Ctr, Zhuzhou 412001, Peoples R China
推荐引用方式 GB/T 7714	Zeng, X. H.,Xue, P.,Wu, L. H.,et al. Achieving an ultra-high strength in a low alloyed Al alloy via a special structural design[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,755:28-36.
APA	Zeng, X. H.,Xue, P.,Wu, L. H.,Ni, D. R.,Xiao, B. L.,&Ma, Z. Y..(2019).Achieving an ultra-high strength in a low alloyed Al alloy via a special structural design.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,755,28-36.
MLA	Zeng, X. H.,et al."Achieving an ultra-high strength in a low alloyed Al alloy via a special structural design".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 755(2019):28-36.