E. V. Naydenkin, I. P. Mishin, V. A. Oborin, A. I. Manisheva
{"title":"α - case形成对超细晶近β钛合金高周疲劳断裂的影响","authors":"E. V. Naydenkin, I. P. Mishin, V. A. Oborin, A. I. Manisheva","doi":"10.1111/ffe.14681","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>Ultrasonic testing was conducted to investigate for the first time the impact of alpha-case formation during air aging (450°C, 5 h) on the very high cycle fatigue (VHCF) and failure of an ultrafine-grained (UFG) near β Ti-5Al-5V-5Mo-1Cr-1Fe alloy. The research findings indicate that air aging results in the development of an alpha-case layer, diminishing the fatigue properties of the UFG titanium alloy produced by radial shear rolling during VHCF testing. The fatigue limit of the alloy samples with an oxide layer decreased from approximately 620 to 520 MPa based on 10<sup>9</sup> cycles. Examination of the fatigue failure mechanisms revealed that the alpha-case layer does not significantly impact crack initiation at stress amplitudes below 650 MPa but does accelerate crack propagation. In the alloy without an oxide layer, at all stress amplitudes, the crack initiation is internal. Oxidation leads to a change in the crack initiation mechanism from internal to subsurface at stress amplitudes above 650 MPa with low-cycle fatigue failure.</p>\n </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 8","pages":"3465-3474"},"PeriodicalIF":3.1000,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Alpha-Case Formation Effect on Very High Cycle Fatigue and Fracture of Ultrafine-Grained Near β Titanium Alloy\",\"authors\":\"E. V. Naydenkin, I. P. Mishin, V. A. Oborin, A. I. Manisheva\",\"doi\":\"10.1111/ffe.14681\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>Ultrasonic testing was conducted to investigate for the first time the impact of alpha-case formation during air aging (450°C, 5 h) on the very high cycle fatigue (VHCF) and failure of an ultrafine-grained (UFG) near β Ti-5Al-5V-5Mo-1Cr-1Fe alloy. The research findings indicate that air aging results in the development of an alpha-case layer, diminishing the fatigue properties of the UFG titanium alloy produced by radial shear rolling during VHCF testing. The fatigue limit of the alloy samples with an oxide layer decreased from approximately 620 to 520 MPa based on 10<sup>9</sup> cycles. Examination of the fatigue failure mechanisms revealed that the alpha-case layer does not significantly impact crack initiation at stress amplitudes below 650 MPa but does accelerate crack propagation. In the alloy without an oxide layer, at all stress amplitudes, the crack initiation is internal. Oxidation leads to a change in the crack initiation mechanism from internal to subsurface at stress amplitudes above 650 MPa with low-cycle fatigue failure.</p>\\n </div>\",\"PeriodicalId\":12298,\"journal\":{\"name\":\"Fatigue & Fracture of Engineering Materials & Structures\",\"volume\":\"48 8\",\"pages\":\"3465-3474\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-05-19\",\"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.14681\",\"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.14681","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}
The Alpha-Case Formation Effect on Very High Cycle Fatigue and Fracture of Ultrafine-Grained Near β Titanium Alloy
Ultrasonic testing was conducted to investigate for the first time the impact of alpha-case formation during air aging (450°C, 5 h) on the very high cycle fatigue (VHCF) and failure of an ultrafine-grained (UFG) near β Ti-5Al-5V-5Mo-1Cr-1Fe alloy. The research findings indicate that air aging results in the development of an alpha-case layer, diminishing the fatigue properties of the UFG titanium alloy produced by radial shear rolling during VHCF testing. The fatigue limit of the alloy samples with an oxide layer decreased from approximately 620 to 520 MPa based on 109 cycles. Examination of the fatigue failure mechanisms revealed that the alpha-case layer does not significantly impact crack initiation at stress amplitudes below 650 MPa but does accelerate crack propagation. In the alloy without an oxide layer, at all stress amplitudes, the crack initiation is internal. Oxidation leads to a change in the crack initiation mechanism from internal to subsurface at stress amplitudes above 650 MPa with low-cycle fatigue failure.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
