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A Subsurface Fatigue Crack Generation Model in near Alpha Titanium at Low Temperature
http://hdl.handle.net/10131/00013024
http://hdl.handle.net/10131/000130242b8cfb0d-9941-4be3-a047-06ced4e4e56c
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-03-05 | |||||
タイトル | ||||||
タイトル | A Subsurface Fatigue Crack Generation Model in near Alpha Titanium at Low Temperature | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | Critical Resolved Shear Stress, High-Cycle Fatigue, Microcrack, Microtexture, Strain Incompatibility, Taylor Factor, Titanium | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Umezawa, Osamu
× Umezawa, Osamu× Li, Wei Bo |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The subsurface fatigue crack generation processes in near α type titanium alloy were divided into four steps: (1) development of a saturated dislocation structure by cyclical micro-plastic strain accumulation, (2) generation of localized slip and/or microcracking to relax the stress concentration in the vicinity of a boundary, (3) microcrack growth and transition to main crack, and (4) crack propagation. The experimentals on transgranular facets formation in Ti-Fe-O alloy were reviewed and a subsurface fatigue crack generation model was discussed. The β platelets which were aligned between the recrystallized α grain and the recovered α grain were responsible for the microcrack generation to form (0001) tansgranular facet in the recrystallized α grains. A combination of the shear stress and tensile stress normal to the basal plane may give a trigger of the (0001) microcracking in the recrystallized α grain. The localized shear stress following slip off on the basal plane was activated at the microcrack tip in the recrystallizedαgrain, and the microcrack grew into the recrystallized α grain to form (0001) transgranular facet. | |||||
書誌情報 |
Materials Science Forum 巻 941, p. 1336-1341, 発行日 2018-12 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 16629752 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.4028/www.scientific.net/MSF.941.1336 | |||||
出版者 | ||||||
出版者 | Scientific.net | |||||
関係URI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.4028/www.scientific.net/MSF.941.1336 | |||||
関連名称 | https://doi.org/10.4028/www.scientific.net/MSF.941.1336 |