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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
ISSN2045-2322
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
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).
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