Strength gradient enhances fatigue resistance of steels
文献类型：期刊论文
| 作者 | Ma ZW(马知未) ; Liu JB; Wang G; Wang HT; Wei YJ(魏宇杰); Gao HJ
|
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2016-02-24 |
| 卷号 | 6页码:22156 |
| 通讯作者邮箱 | yujie_wei@lnm.imech.ac.cn ; huajian_gao@brown.edu |
| ISSN号 | 2045-2322 |
| 产权排序 | [Ma, Zhiwei; Wei, Yujie] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; [Liu, Jiabin; Wang, Hongtao] Zhejiang Univ, Fac Engn, Hangzhou 310027, Zhejiang, Peoples R China; [Wang, Gang] Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China; [Gao, Huajian] Brown Univ, Sch Engn, Providence, RI 02912 USA |
| 通讯作者 | Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China. |
| 中文摘要 | Steels are heavily used in infrastructure and the transportation industry, and enhancing their fatigue resistance is a major challenge in materials engineering. In this study, by introducing a gradient microstructure into 304 austenitic steel, which is one of the most widely used types of stainless steel, we show that a strength gradient substantially enhances the fatigue life of the material. Pre-notched samples with negative strength gradients in front of the notch's tip endure many more fatigue cycles than do samples with positive strength gradients during the crack initiation stage, and samples with either type of gradient perform better than do gradient-free samples with the same average yield strength. However, as a crack grows, samples with positive strength gradients exhibit better resistance to fatigue crack propagation than do samples with negative gradients or no gradient. This study demonstrates a simple and promising strategy for using gradient structures to enhance the fatigue resistance of materials and complements related studies of strength and ductility. |
| 分类号 | 一类 |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | MOLECULAR-DYNAMICS ; SURFACE-TENSION ; BUBBLE |
| 收录类别 | SCI |
| 原文出处 | http://dx.doi.org/10.1038/srep22156 |
| 语种 | 英语 |
| WOS记录号 | WOS:000370773100001 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/58665]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Ma ZW,Liu JB,Wang G,et al. Strength gradient enhances fatigue resistance of steels[J]. SCIENTIFIC REPORTS,2016,6:22156. |
| APA | Ma ZW,Liu JB,Wang G,Wang HT,Wei YJ,&Gao HJ.(2016).Strength gradient enhances fatigue resistance of steels.SCIENTIFIC REPORTS,6,22156. |
| MLA | Ma ZW,et al."Strength gradient enhances fatigue resistance of steels".SCIENTIFIC REPORTS 6(2016):22156. |
入库方式： OAI收割
来源：力学研究所
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