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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/48166

Title: Fatigue crack growth characteristics of Ti-15V-3Cr-3Sn-3Al alloy in variously aged conditions
Authors: Leu-Wen Tsay
S. T. Chang
Chun Chen
Contributors: 國立臺灣海洋大學:光電與材料科技學系
Keywords: titanium–15vanadium–3chromium–3tin–3aluminum
fatigue crack growth rate
aging treatment
stress ratio
Date: 2013-02
Issue Date: 2018-08-15T02:29:12Z
Publisher: Materials Transactions
Abstract: Abstract: In this study, the fatigue crack growth rate (FCGR) of a Ti–15V–3Cr–3Al–3Sn (Ti-15-3) alloy, which was aged at a temperature range of 371 to 593°C, was measured in air at room temperature. The specimen aged at 371°C showed clear serrations in the crack growth curve at a stress ratio (R) of 0.1, and it also exhibited a larger Paris law gradient than the other aged specimens at R = 0.5. The peak-aged (426°C aged) specimen had the highest FCGR of the specimens, regardless of the stress ratio. A gradual decrease in the FCGRs with increasing aging temperature, from 482 to 593°C, was observed for the over-aged specimens. Cleavage-like fracture was more likely to occur in the under- and peak-aged specimens as compared to the transgranular fatigue in the over-aged specimens. It seemed that the coarse α platelets with lowered hardness in the over-aged specimens resulted in a higher resistance to fatigue crack growth in the Ti-15-3 alloy.
Relation: 54(3) pp.326-331
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/48166
Appears in Collections:[光電科學研究所] 期刊論文

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