An analysis of premature cracking associated with microstructural alterations in an AISI 52100 failed wind turbine bearing using X-ray tomography

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• 作者：Benjamin Gould^a ; ^b ; ^{bengould@udel.edu} ; Aaron Greco^a ; Kenred Stadler^c ; Xianghui Xiao^d
• 关键词：White etching cracks ; X-ray tomography ; Bearing failures ; Microstructural alterations ; Premature fatigue
• 刊名：Materials & Design
• 出版年：2017
• 出版时间：5 March 2017
• 年：2017
• 卷：117
• 期：Complete
• 页码：417-429
• 全文大小：5416 K
• 卷排序：117

文摘

Crack networks were mapped using X-Ray Tomography in order to study crack morphology and inclusion interaction Subsurface crack initiation was verified as the dominant method of premature failure formation within wind turbine bearings Serial sectioning and etching were used to observe the presence of microstructural alterations surrounding all cracking Instances of small cracking around inclusions were observed, and are likely the initiation points for larger crack networks. The detected failures likely occurred due to an accelerated fatigue process as opposed to classical rolling contact fatigue.