Study on fracture mechanism and fatigue life prediction for cutting in-situ TiB2/7050Al MMCs

Yi feng Xiong, Wen hu Wang, Kun yang Lin, Xiao fen Liu, Rui song Jiang, Chu quan Deng

科研成果: 书/报告/会议事项章节会议稿件同行评审

1 引用 (Scopus)

摘要

For machined parts, the surface roughness and profile would have a significant impact on the fatigue life and fracture mechanism. At present, a lot of research have been carried out on the cutting mechanism, modeling and machining performance of particle reinforced Al-based metal matrix composites. However, the study of fatigue life and fracture mechanism of machined parts after cutting particle reinforced Al-based metal matrix composites is rarely reported. In this paper, the fatigue life and fatigue fracture morphology of in-situ TiB2/7050Al MMCs were studied by high cycle fatigue test under different loading stresses. It was found that the surface roughness influenced the fatigue life greatly. With surface roughness decreasing, the fatigue life of machined parts increased exponentially. The fracture mechanism of cutting in-situ TiB2/7050Al MMCs was found to be brittle fracture due to the existence of fine particles. Besides, a fatigue life prediction model was established based on the machined surface roughness. With validation, the relative errors between prediction model and experiment were smaller than 11% indicating that the proposed fatigue life prediction model of machined in-situ TiB2/7050Al MMCs parts was of good reliability and accuracy.

源语言英语
主期刊名Advanced Materials
主期刊副标题Design, Processing, Characterization, and Applications
出版商American Society of Mechanical Engineers (ASME)
ISBN(电子版)9780791859490
DOI
出版状态已出版 - 2019
活动ASME 2019 International Mechanical Engineering Congress and Exposition, IMECE 2019 - Salt Lake City, 美国
期限: 11 11月 201914 11月 2019

出版系列

姓名ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
12

会议

会议ASME 2019 International Mechanical Engineering Congress and Exposition, IMECE 2019
国家/地区美国
Salt Lake City
时期11/11/1914/11/19

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