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	Extra strengthening and work hardening in gradient nanotwinned metals
	Cheng, Z1; Zhou, HF; Lu, QH; Gao, HJ; Lu, L
刊名	SCIENCE
	2018-11-02
卷号	362期号:6414页码:559-+
ISSN号	0036-8075
DOI	10.1126/science.aau1925
英文摘要	Gradient structures exist ubiquitously in nature and are increasingly being introduced in engineering. However, understanding structural gradient-related mechanical behaviors in all gradient structures, including those in engineering materials, has been challenging. We explored the mechanical performance of a gradient nanotwinned structure with highly tunable structural gradients in pure copper. A large structural gradient allows for superior work hardening and strength that can exceed those of the strongest component of the gradient structure. We found through systematic experiments and atomistic simulations that this unusual behavior is afforded by a unique patterning of ultrahigh densities of dislocations in the grain interiors. These observations not only shed light on gradient structures, but may also indicate a promising route for improving the mechanical properties of materials through gradient design.
学科主题	Multidisciplinary Sciences
语种	英语
WOS记录号	WOS:000450460000039
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79836]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Chinese Acad Sci, Inst Met Res, Shengyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Brown Univ, Sch Engn, Providence, RI 02912 USA
推荐引用方式 GB/T 7714	Cheng, Z,Zhou, HF,Lu, QH,et al. Extra strengthening and work hardening in gradient nanotwinned metals[J]. SCIENCE,2018,362(6414):559-+.
APA	Cheng, Z,Zhou, HF,Lu, QH,Gao, HJ,&Lu, L.(2018).Extra strengthening and work hardening in gradient nanotwinned metals.SCIENCE,362(6414),559-+.
MLA	Cheng, Z,et al."Extra strengthening and work hardening in gradient nanotwinned metals".SCIENCE 362.6414(2018):559-+.

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