{"title":"室温退火Ti-6Al-4V的持续载荷开裂","authors":"Y. Lenets, James P. Thomas, T. Nicholas","doi":"10.1115/imece1997-0547","DOIUrl":null,"url":null,"abstract":"\n Sustained-load crack growth in the near threshold regime was studied at room temperature in a mill-annealed Ti-6Al-4V titanium alloy forging using mini-C(T) specimens in the C-L orientation. The observed sustained-load cracking behavior exhibited an apparent crack length dependence beyond that accounted for by the fracture mechanics parameter K. In addition, the initial value of K, applied after crack extension by fatigue, influenced the subsequent crack growth rates. The influence of the far-field specimen stresses on the hydrogen diffusion process at the crack tip and transient crack growth rate effects appear to be responsible for the observed behavior.","PeriodicalId":407468,"journal":{"name":"Recent Advances in Solids/Structures and Application of Metallic Materials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sustained-Load Cracking in Mill Annealed Ti-6Al-4V at Room Temperature\",\"authors\":\"Y. Lenets, James P. Thomas, T. Nicholas\",\"doi\":\"10.1115/imece1997-0547\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n Sustained-load crack growth in the near threshold regime was studied at room temperature in a mill-annealed Ti-6Al-4V titanium alloy forging using mini-C(T) specimens in the C-L orientation. The observed sustained-load cracking behavior exhibited an apparent crack length dependence beyond that accounted for by the fracture mechanics parameter K. In addition, the initial value of K, applied after crack extension by fatigue, influenced the subsequent crack growth rates. The influence of the far-field specimen stresses on the hydrogen diffusion process at the crack tip and transient crack growth rate effects appear to be responsible for the observed behavior.\",\"PeriodicalId\":407468,\"journal\":{\"name\":\"Recent Advances in Solids/Structures and Application of Metallic Materials\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1997-11-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Recent Advances in Solids/Structures and Application of Metallic Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1115/imece1997-0547\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Recent Advances in Solids/Structures and Application of Metallic Materials","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1115/imece1997-0547","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Sustained-Load Cracking in Mill Annealed Ti-6Al-4V at Room Temperature
Sustained-load crack growth in the near threshold regime was studied at room temperature in a mill-annealed Ti-6Al-4V titanium alloy forging using mini-C(T) specimens in the C-L orientation. The observed sustained-load cracking behavior exhibited an apparent crack length dependence beyond that accounted for by the fracture mechanics parameter K. In addition, the initial value of K, applied after crack extension by fatigue, influenced the subsequent crack growth rates. The influence of the far-field specimen stresses on the hydrogen diffusion process at the crack tip and transient crack growth rate effects appear to be responsible for the observed behavior.
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