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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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氢对Al-Li合金8091-T6疲劳寿命和断裂行为的影响
, PP. 257-260
Keywords: Al-Li合金,疲劳寿命,变形机制,断裂行为
Abstract:
本文研究了氢含量对Ａｌ－Ｌｉ合金８０９１－Ｔ６薄板光滑试样疲劳寿命（Ｎｆ）、变形机制和断裂模式的影响.结果表明,合金的氢含量由１．０４３降低到０．０５３μｇ／ｇ,为成超低氢合金.Ｎｆ提高约一倍,疲劳变形机制由切割机制转变为绕过机制,断裂模式由以穿晶脆性断裂为主转变为穿晶韧性断裂,由氢脆引起的低韧性断裂特点完全消失.本文还简要地讨论了氢含量变化造成疲劳变形机制和断裂模式转变的原因.
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