{"title":"通过强化处理提高预疲劳测试渗碳钢的疲劳寿命","authors":"Masashi Fujino, Toshiya Tsuji, Koji Takahashi","doi":"10.1111/ffe.14414","DOIUrl":null,"url":null,"abstract":"<p>The effect of shot peening (SP) on pre-fatigue tested carburized steel was investigated. Plane-bending fatigue tests were conducted on carburized CrMo steel that was pre-fatigue tested and treated with SP. Fatigue cracks were induced by pre-fatigue tests with a stress amplitude of <i>σ</i><sub><i>a</i></sub> = 1000 MPa, and the number of the pre-fatigue test cycles was 2.0 × 10<sup>4</sup> (<i>L</i>5 test) and 4.0 × 10<sup>4</sup> (<i>L</i>15 test). We compared the fatigue lives of the fatigue-damaged and smooth specimens without fatigue damage treated with the same SP. The fatigue life of the <i>L</i>5 tested specimens with SP was longer than that of the non-fatigue damaged smooth specimens after SP. Therefore, the fatigue cracks introduced by the <i>L</i>5 test can be rendered harmless by SP. Furthermore, near-surface material properties were evaluated and the mechanisms of rendering surface cracks harmless were investigated.</p>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"47 10","pages":"3848-3857"},"PeriodicalIF":3.1000,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ffe.14414","citationCount":"0","resultStr":"{\"title\":\"Fatigue life improvement by shot peening for pre-fatigue tested carburized steel\",\"authors\":\"Masashi Fujino, Toshiya Tsuji, Koji Takahashi\",\"doi\":\"10.1111/ffe.14414\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The effect of shot peening (SP) on pre-fatigue tested carburized steel was investigated. Plane-bending fatigue tests were conducted on carburized CrMo steel that was pre-fatigue tested and treated with SP. Fatigue cracks were induced by pre-fatigue tests with a stress amplitude of <i>σ</i><sub><i>a</i></sub> = 1000 MPa, and the number of the pre-fatigue test cycles was 2.0 × 10<sup>4</sup> (<i>L</i>5 test) and 4.0 × 10<sup>4</sup> (<i>L</i>15 test). We compared the fatigue lives of the fatigue-damaged and smooth specimens without fatigue damage treated with the same SP. The fatigue life of the <i>L</i>5 tested specimens with SP was longer than that of the non-fatigue damaged smooth specimens after SP. Therefore, the fatigue cracks introduced by the <i>L</i>5 test can be rendered harmless by SP. Furthermore, near-surface material properties were evaluated and the mechanisms of rendering surface cracks harmless were investigated.</p>\",\"PeriodicalId\":12298,\"journal\":{\"name\":\"Fatigue & Fracture of Engineering Materials & Structures\",\"volume\":\"47 10\",\"pages\":\"3848-3857\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-08-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ffe.14414\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fatigue & Fracture of Engineering Materials & Structures\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/ffe.14414\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fatigue & Fracture of Engineering Materials & Structures","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ffe.14414","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Fatigue life improvement by shot peening for pre-fatigue tested carburized steel
The effect of shot peening (SP) on pre-fatigue tested carburized steel was investigated. Plane-bending fatigue tests were conducted on carburized CrMo steel that was pre-fatigue tested and treated with SP. Fatigue cracks were induced by pre-fatigue tests with a stress amplitude of σa = 1000 MPa, and the number of the pre-fatigue test cycles was 2.0 × 104 (L5 test) and 4.0 × 104 (L15 test). We compared the fatigue lives of the fatigue-damaged and smooth specimens without fatigue damage treated with the same SP. The fatigue life of the L5 tested specimens with SP was longer than that of the non-fatigue damaged smooth specimens after SP. Therefore, the fatigue cracks introduced by the L5 test can be rendered harmless by SP. Furthermore, near-surface material properties were evaluated and the mechanisms of rendering surface cracks harmless were investigated.
期刊介绍：
Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.
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