Effect of structure on fatigue properties and fracture toughness for TA15 titanium alloy

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作者：
Beijing Institute of Aeronautical Materials, Beijing 100095, China [1 ]
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Cailiao Gongcheng | 2007年 / 7卷 / 3-5期
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摘要：
Effect of lamellar and bi-modal structure on fatigue properties and fracture toughness have been investigated for TA15 titanium alloy. The results show that fatigue strength of bi-modal structure is higher than lamellar structure in the low cycle region, however the fatigue limit of lamellar structure is higher than bi-modal structure in the high cycle. The damage tolerance properties of lamellar are better than bi-modal structure, i.e. fracture toughness is higher and crack growth rate is lower of lamellar structure.
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