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OALib Journal期刊
ISSN: 2333-9721
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激光冲击处理后ni基高温合金的性能
Abstract:
？对ni基高温合金进行了激光冲击强化处理,测量了处理后ni基高温合金的残余应力、表面粗糙度分布规律和疲劳强度.结果表明,激光冲击处理后凹坑内残余压应力值为-200～-400mpa,其分布服从泊松正态分布规律;承载能力比未冲击试样提高大约150mpa;激光冲击区的粗糙度降低一个等级,凹坑内粗糙度数值分布也服从正态分布规律.激光冲击处理后表面出现了组织细化的硬化层,强化效果明显,残余压应力有极大的提高,有效地提高了抗疲劳寿命.
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