Effect of multifunction cavitation on microstructure and plane bending fatigue properties of low-alloy steel

Results in Materials Pub Date : 2024-05-10 DOI:10.1016/j.rinma.2024.100578

Masataka Ijiri , Takayuki Ogi , Toshihiko Yoshimura , Kenta Minamizawa , Shoichi Kikuchi

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Abstract

Multifunction cavitation (MFC) has potential as an environmentally friendly surface-modification method. In the present study, the modified surface layer and the fatigue properties for MFC-processed low-alloy steel were investigated. When the processing time was longer than 2 min, the surface roughness increased and the surface potential decreased. The maximum compressive residual stress was induced after a processing time of 2 min, and decreased for longer processing times. Electron backscatter diffraction analysis of a cross section of a sample subjected to MFC for 30 min showed that the modified layer was thicker than that for samples processed for shorter times. The fatigue life at high cycle numbers increased for the specimens processed by MFC under the conditions corresponding to the greatest compressive residual stress. MFC processing was shown to be effective in improving the fatigue properties of steel, and therefore has potential as a next-generation surface-modification method.

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多功能空化对低合金钢微观结构和平面弯曲疲劳性能的影响

多功能空化（MFC）作为一种环境友好型表面改性方法具有潜力。本研究调查了 MFC 加工低合金钢的改性表层和疲劳性能。当加工时间超过 2 分钟时，表面粗糙度增加，表面电位降低。加工时间为 2 分钟后产生了最大压缩残余应力，加工时间越长，残余应力越小。对经过 30 分钟 MFC 处理的样品横截面进行的电子反向散射衍射分析表明，与处理时间较短的样品相比，改性层更厚。在与最大压缩残余应力相对应的条件下，经过 MFC 处理的试样在高循环次数下的疲劳寿命有所增加。MFC 处理能有效改善钢的疲劳性能，因此有望成为下一代表面改性方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Materials

CiteScore

5.30

自引率

0.00%

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