中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Exploring the fatigue strength improvement of Cu-Al alloys

文献类型:期刊论文

作者Liu, R; Tian, YZ; Zhang, ZJ; Zhang, P; An, XH; Zhang, ZF; Zhang, ZF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
刊名ACTA MATERIALIA
出版日期2018-02-01
卷号144页码:613-626
ISSN号1359-6454
关键词Severe Plastic-deformation Stacking-fault Energy Ultrafine-grained Copper High-pressure Torsion Cyclic Deformation Microstructural Evolution Nanocrystalline Metals Optimizing Strength Ductility Behavior
英文摘要As a significant scientific problem directly impacting on the long-term safety of engineering materials and facilities, the improvement of fatigue strength under fully-reversed cycling was comprehensively explored in this study. Advantageous material characteristics for the improvement of fatigue strength were summarized from the achievements of the previous researches, followed by a new attempt to combine them in material design. As the model material, alpha-Cu-Al alloys with clean ultrafine-grains as well as large proportions of twin boundaries were thus produced, which exhibited a notable fatigue strength improvement (up to 155% higher than the coarse-grained counterparts and 40% higher than the counterparts produced by severe plastic deformation). Furthermore, a general principle briefly summarized as localized fatigue damage reduction was proposed based on the analysis of the optimizing methods including microstructure optimization and composition optimization. Accordingly, several recommended features to obtain such high fatigue strength materials were finally listed for further anti fatigue design, such as uniform grains with small size and stable boundaries; low initial dislocation density, and proper alloying composition. Published by Elsevier Ltd on behalf of Acta Materialia Inc.; As a significant scientific problem directly impacting on the long-term safety of engineering materials and facilities, the improvement of fatigue strength under fully-reversed cycling was comprehensively explored in this study. Advantageous material characteristics for the improvement of fatigue strength were summarized from the achievements of the previous researches, followed by a new attempt to combine them in material design. As the model material, alpha-Cu-Al alloys with clean ultrafine-grains as well as large proportions of twin boundaries were thus produced, which exhibited a notable fatigue strength improvement (up to 155% higher than the coarse-grained counterparts and 40% higher than the counterparts produced by severe plastic deformation). Furthermore, a general principle briefly summarized as localized fatigue damage reduction was proposed based on the analysis of the optimizing methods including microstructure optimization and composition optimization. Accordingly, several recommended features to obtain such high fatigue strength materials were finally listed for further anti fatigue design, such as uniform grains with small size and stable boundaries; low initial dislocation density, and proper alloying composition. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
学科主题Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种英语
资助机构National Natural Science Foundation of China (NSFC) [51201165, 51331007, 51501198]
公开日期2018-06-05
源URL[http://ir.imr.ac.cn/handle/321006/79550]  
专题金属研究所_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, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Liu, R,Tian, YZ,Zhang, ZJ,et al. Exploring the fatigue strength improvement of Cu-Al alloys[J]. ACTA MATERIALIA,2018,144:613-626.
APA Liu, R.,Tian, YZ.,Zhang, ZJ.,Zhang, P.,An, XH.,...&Zhang, ZF .(2018).Exploring the fatigue strength improvement of Cu-Al alloys.ACTA MATERIALIA,144,613-626.
MLA Liu, R,et al."Exploring the fatigue strength improvement of Cu-Al alloys".ACTA MATERIALIA 144(2018):613-626.

入库方式: OAI收割

来源:金属研究所

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