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 |
| 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 |
| ISSN号 | 1359-6454 |
| 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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