Fatigue strength and crack initiation mechanism of very-high-cycle fatigue for low alloy steels
文献类型：期刊论文
| 作者 | Hong YS(洪友士) ; Zhao AG(赵爱国); Qian GA(钱桂安); Zhou CE(周承恩)
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| 刊名 | Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
 |
| 出版日期 | 2012-08 |
| 卷号 | 43A期号:8页码:2753-2762 |
| 通讯作者邮箱 | hongys@imech.ac.cn |
| 关键词 | CHROMIUM-BEARING STEEL LONG-LIFE FATIGUE S-N CURVE METALLIC MATERIALS BEHAVIOR FAILURE REGIME STRESS |
| ISSN号 | 1073-5623 |
| 产权排序 | [Hong, Youshi; Zhao, Aiguo; Qian, Guian; Zhou, Chengen] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Qian, Guian] PSI Paul Scherrer Inst, Lab Nucl Mat, CH-5232 Villigen, Switzerland; [Zhou, Chengen] Inner Mongolia Univ Technol, Coll Sci, Hohhot 010051, Peoples R China |
| 通讯作者 | Hong, YS (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| 合作状况 | 国际 |
| 中文摘要 | The fatigue strength and crack initiation mechanisms of very-high-cycle fatigue (VHCF) for two low alloy steels were investigated. Rotary bending tests at 52.5 Hz with hour-glass type specimens were carried out to obtain the fatigue propensity of the test steels, for which the failure occurred up to the VHCF regime of 10(8) cycles with the S-N curves of stepwise tendency. Fractography observations show that the crack initiation of VHCF is at subsurface inclusion with "fish-eye" pattern. The fish-eye is of equiaxed shape and tends to tangent the specimen surface. The size of the fish-eye becomes large with the increasing depth of related inclusion from the surface. The fish-eye crack grows faster outward to the specimen surface than inward. The values of the stress intensity factor (K (I) ) at different regions of fracture surface were calculated, indicating that the K (I) value of fish-eye crack is close to the value of relevant fatigue threshold (Delta K (th) ). A new parameter was proposed to interpret the competition mechanism of fatigue crack initiation at the specimen surface or at the subsurface. The simulation results indicate that large inclusion size, small grain size, and high strength of material will promote fatigue crack initiation at the specimen subsurface, which are in agreement with experimental observations. |
| 分类号 | 二类/Q1 |
| 类目[WOS] | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Materials Science ; Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | CHROMIUM-BEARING STEEL ; LONG-LIFE FATIGUE ; S-N CURVE ; METALLIC MATERIALS ; BEHAVIOR ; FAILURE ; REGIME ; STRESS |
| 收录类别 | SCI ; EI |
| 原文出处 | http://link.springer.com/content/pdf/10.1007%2Fs11661-011-0816-7.pdf |
| 语种 | 英语 |
| WOS记录号 | WOS:000305732900029 |
| 公开日期 | 2014-01-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/47716]  |
| 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 | Hong YS,Zhao AG,Qian GA,et al. Fatigue strength and crack initiation mechanism of very-high-cycle fatigue for low alloy steels[J]. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science,2012,43A(8):2753-2762. |
| APA | 洪友士,赵爱国,钱桂安,&周承恩.(2012).Fatigue strength and crack initiation mechanism of very-high-cycle fatigue for low alloy steels.Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science,43A(8),2753-2762. |
| MLA | 洪友士,et al."Fatigue strength and crack initiation mechanism of very-high-cycle fatigue for low alloy steels".Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 43A.8(2012):2753-2762. |
入库方式： OAI收割
来源：力学研究所
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