Exceptional high fatigue strength in Cu-15at.% Al alloy with moderate grain size

IMR OpenIR

	Exceptional high fatigue strength in Cu-15at.% Al alloy with moderate grain size
	Liu, Rui; Tian, Yanzhong; Zhang, Zhenjun; An, Xianghai; Zhang, Peng; Zhang, Zhefeng; Tian, YZ; Zhang, ZF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
	2016-06-06
发表期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
卷号	6
摘要	It is commonly proposed that the fatigue strength can be enhanced by increasing the tensile strength, but this conclusion needs to be reconsidered according to our study. Here a recrystallized alpha-Cu-15at.% Al alloy with moderate grain size of 0.62 mu m was fabricated by cold rolling and annealing, and this alloy achieved exceptional high fatigue strength of 280 MPa at 107 cycles. This value is much higher than the fatigue strength of 200 MPa for the nano-crystalline counterpart (0.04 mu m in grain size) despite its higher tensile strength. The remarkable improvement of fatigue strength should be mainly attributed to the microstructure optimization, which helps achieve the reduction of initial damage and the dispersion of accumulated damage. A new strategy of "damage reduction" was then proposed for fatigue strength improvement, to supplement the former strengthening principle. The methods and strategies summarized in this work offer a general pathway for further improvement of fatigue strength, in order to ensure the long-term safety of structural materials.
部门归属	[liu, rui ; tian, yanzhong ; zhang, zhenjun ; zhang, peng ; zhang, zhefeng] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china ; [an, xianghai] univ sydney, sch aerosp mech & mechatron engn, sydney, nsw 2006, australia
学科领域	Science & Technology - Other Topics
资助者	National Natural Science Foundation of China (NSFC) [51201165, 51331007, 51501198]
收录类别	sci
语种	英语
WOS记录号	WOS:000377133300002
引用统计	被引频次：43[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/321006/75837
专题	中国科学院金属研究所
通讯作者	Tian, YZ; Zhang, ZF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Liu, Rui,Tian, Yanzhong,Zhang, Zhenjun,et al. Exceptional high fatigue strength in Cu-15at.% Al alloy with moderate grain size[J]. SCIENTIFIC REPORTS,2016,6.
APA	Liu, Rui.,Tian, Yanzhong.,Zhang, Zhenjun.,An, Xianghai.,Zhang, Peng.,...&Zhang, ZF .(2016).Exceptional high fatigue strength in Cu-15at.% Al alloy with moderate grain size.SCIENTIFIC REPORTS,6.
MLA	Liu, Rui,et al."Exceptional high fatigue strength in Cu-15at.% Al alloy with moderate grain size".SCIENTIFIC REPORTS 6(2016).