Fatigue Property of Commercial Pure Zirconium Subjected to Surface Nanocrystallization

被引：0

作者：

Zhang C. ^{[1
]}

Yu F. ^{[1
]}

Wang Y. ^{[1
]}

He X. ^{[1
]}

机构：

[1] School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an

来源：

| 1600年 / Editorial Office of Chinese Journal of Rare Metals卷 / 41期

关键词：

Fatigue limit; Lattice distortion; Residual stress; Surface nanocrystallization;

D O I：

10.13373/j.cnki.cjrm.XY14060601

中图分类号：

学科分类号：

摘要：

Commercial pure zirconium was processed by means of surface mechanical attrition treatment (SMAT), and the fatigue property of the sample was investigated using four-point bend fatigue test. Microstructure observation was carried out using transmission electron microscope (TEM) and optical microscope (OM). Nano-indentation test was conducted to measure the micro-hardness variation from surface layer to matrix. X-ray diffraction (XRD) method was used to evaluate the crystallite size and micro-strain of the treated surface layer and the in-depth residual stress. The results indicated that the fatigue limit of SMAT sample was 195 MPa, the fatigue limit of as-received sample was 159 MPa, and the fatigue limit could be increased by 23%, which could be attributed to the nanostructured surface layer, the work hardening and the compressive residual stress induced by the SMAT process. In addition, the fatigue life of SMAT samples was much less than that of as-received sample, of which the stress amplitude was greater than 270 MPa, and when it was less than 270 MPa, the fatigue property was superior to that of as-received sample. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.

引用

页码：284 / 289

页数：5

共 16 条

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