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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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近门槛值疲劳裂纹扩展微观断口形貌的研究
, PP. 67-72
Keywords: 疲劳裂纹,断口形貌,近门槛值
Abstract:
本文研究了LD10铝合金和Ti-6Al-4V合金近门槛值疲劳裂纹扩展的断口形貌。SEM观察表明两种合金的近门槛值区域(1×10~(-7)-1×10~(-5)mm/cycle)的微观断口形貌均为循环解理刻面;在LD10铝合金中循环解理刻面多数呈锯齿型或梯田状,而在Ti-6Al-4V合金中主要为孤岛状循环解理刻面。本文在实验观察的基础上,进一步阐明了近门槛值疲劳裂纹扩展机理。
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