{"title":"不同冷膨胀芯轴前锥角强化钛合金开孔结构的准静态拉伸疲劳性能","authors":"Junpeng Chen, Yingxiang Ma, Yingxin Chen, Yangjie Zuo","doi":"10.1111/ffe.14559","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>In this paper, the cold expansion test of titanium alloy open hole structures was conducted, and the fatigue performance was also assessed. A parametric study of the mandrel front cone angle revealed a correlation with the strengthening quality and fatigue performance evolution, providing valuable insight for optimization of open hole structure designs. The results showed that the strengthening resistance decreased and then increased with the increase of the front cone angle. The microhardness of the hole edge increased and exhibited obvious sensitivity to the mandrel front cone angle. As expected, the fatigue life of specimens increased after strengthening. The best fatigue life strengthening front cone angle was 15°. Although the front cone angle exhibited little influence on the location of the fatigue crack initiation zone and crack propagating direction, the crack extension rate and the stiffness degradation rate could be reduced by the proper mandrel front cone angle.</p>\n </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 4","pages":"1574-1588"},"PeriodicalIF":3.1000,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Quasistatic Tensile and Fatigue Performances of Titanium Alloy Open Hole Structures Strengthened by Different Cold Expansion Mandrel Front Cone Angles\",\"authors\":\"Junpeng Chen, Yingxiang Ma, Yingxin Chen, Yangjie Zuo\",\"doi\":\"10.1111/ffe.14559\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>In this paper, the cold expansion test of titanium alloy open hole structures was conducted, and the fatigue performance was also assessed. A parametric study of the mandrel front cone angle revealed a correlation with the strengthening quality and fatigue performance evolution, providing valuable insight for optimization of open hole structure designs. The results showed that the strengthening resistance decreased and then increased with the increase of the front cone angle. The microhardness of the hole edge increased and exhibited obvious sensitivity to the mandrel front cone angle. As expected, the fatigue life of specimens increased after strengthening. The best fatigue life strengthening front cone angle was 15°. Although the front cone angle exhibited little influence on the location of the fatigue crack initiation zone and crack propagating direction, the crack extension rate and the stiffness degradation rate could be reduced by the proper mandrel front cone angle.</p>\\n </div>\",\"PeriodicalId\":12298,\"journal\":{\"name\":\"Fatigue & Fracture of Engineering Materials & Structures\",\"volume\":\"48 4\",\"pages\":\"1574-1588\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-01-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"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.14559\",\"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.14559","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}
Quasistatic Tensile and Fatigue Performances of Titanium Alloy Open Hole Structures Strengthened by Different Cold Expansion Mandrel Front Cone Angles
In this paper, the cold expansion test of titanium alloy open hole structures was conducted, and the fatigue performance was also assessed. A parametric study of the mandrel front cone angle revealed a correlation with the strengthening quality and fatigue performance evolution, providing valuable insight for optimization of open hole structure designs. The results showed that the strengthening resistance decreased and then increased with the increase of the front cone angle. The microhardness of the hole edge increased and exhibited obvious sensitivity to the mandrel front cone angle. As expected, the fatigue life of specimens increased after strengthening. The best fatigue life strengthening front cone angle was 15°. Although the front cone angle exhibited little influence on the location of the fatigue crack initiation zone and crack propagating direction, the crack extension rate and the stiffness degradation rate could be reduced by the proper mandrel front cone angle.
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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