Very long life fatigue behavior of bearing steel AISI 52100

Q.Y. Wang; H. Zhang; M.R. SriramanS.X. Li

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Very long life fatigue behavior of bearing steel AISI 52100

机译：Very long life fatigue behavior of bearing steel AISI 52100

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For many applications, the understanding of very long life fatigue in materials becomes extremely important. In this study, the fatigue behavior of bearing steel GCr15 (conforming to AISI 52100) at very high number of cycles has been examined. Experiments on hourglass specimens were conducted in air at room temperature, for fully reversed loading condition (R=-1), using a piezoelectric fatigue testing machine operating at a frequency of 20kHz. The results indicate that the S-N data does not reach a horizontal asymptote (signifying the fatigue limit) at 10~7 cycles, as conventionally believed, and that the material can fracture up to 10~9 cycles. Therefore, to quote a fatigue limit at 10~7 cycles may not hold good for the material studied. The influence of defects (such as inclusions) on the crack initiation and fracture was analyzed by scanning electron microscopy.

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来源
《Key engineering materials》 |2005年第3期|1846-1851|共6页
作者
Q.Y. Wang; H. Zhang; M.R. SriramanS.X. Li;
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作者单位

Shenyang National Lab. for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China;

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原文格式 PDF
正文语种英语
中图分类工程基础科学;
关键词
very long life fatigue; S-N data; fatigue limit; gigacycle fatigue; subsurface crack initiation; inclusion;

Very long life fatigue behavior of bearing steel AISI 52100

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