某型发动机导管焊缝裂纹失效分析
Heat Treatment of Metals(2011)
Abstract
通过对裂纹断口进行的宏、微观观察,成分检查和综合分析,结果显示,发动机导管焊缝的裂纹性质为疲劳裂纹,疲劳起始于焊缝靠近外表面处的疏松缺陷。钎焊部位存在疏松缺陷是导致焊缝产生裂纹的根本原因。
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Key words
stress concentration,fatigue fracture,welding crack,aero-engine turbine,pipe
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