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Exploring the fatigue strength improvement of Cu-Al alloys
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.
2018-02-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume144Pages:613-626
AbstractAs 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.
description.department[liu, r. ; tian, y. z. ; zhang, z. j. ; zhang, p. ; an, x. h. ; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [liu, r.] univ chinese acad sci, 19 yuquan rd, beijing 100049, peoples r china ; [an, x. h.] univ sydney, sch aerosp mech & mechatron engn, sydney, nsw 2006, australia
KeywordSevere Plastic-deformation Stacking-fault Energy Ultrafine-grained Copper High-pressure Torsion Cyclic Deformation Microstructural Evolution Nanocrystalline Metals Optimizing Strength Ductility Behavior
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC) [51201165, 51331007, 51501198]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79550
Collection中国科学院金属研究所
Corresponding AuthorTian, 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.
Recommended Citation
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.
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