采用扫描电子显微镜、能谱分析仪和金相显微镜对空气压缩机叶片的宏微观形貌、断口表面成分、金相组织及硬度进行了观察和分析.结果表明:断裂叶片的硬度低于其他叶片,导致其抗高周疲劳性能下降,在近表面夹杂物处萌生疲劳裂纹,最终发生断裂.
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