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材料工程  2007 

TA15钛合金两类组织对疲劳性能和断裂韧度的影响

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Keywords: 钛合金,片状组织,双态组织,疲劳性能,断裂韧度

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Abstract:

研究了TA15钛合金片状和双态两种典型组织对疲劳性能和断裂韧度的影响,结果表明在S-N曲线的高应力区,双态组织的疲劳强度高于片状组织;在低应力区,情况则相反,且片状组织的疲劳极限(656MPa)高于双态组织(565MPa).片状组织的疲劳裂纹扩展速率低于双态组织,且断裂韧度K1C高于双态组织,即片状组织的损伤容限性能优于双态组织.

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