Effects of multiple laser shock processing (LSP) impacts on mechanical properties and wear behaviors of AISI 8620 steel
Effects of multiple laser shock processing (LSP) impacts on mechanical properties and wear behaviors of AISI 8620 steel
复制标题
多次激光冲击加工 (LSP) 对 AISI 8620 钢机械性能和磨损行为的影响
DOI：
10.1016/j.msea.2011.12.053
复制
发表时间：
2012-02-28
期刊：
影响因子：
6.4
通讯作者：
Zhang, Y. K.
中科院分区：
文献类型：
--
作者：
Lu, J. Z.;Luo, K. Y.;Zhang, Y. K.
研究了不同脉冲能量的多次激光冲击处理(LSP)对AISI8620钢的力学性能和磨损行为的影响。通过计算磨损表面的体积损失和扫描电子显微镜(SEM)对磨损进行了分析。测量了表面形貌、粗糙度和显微硬度。用透射电子显微镜观察了未处理和LSP处理的样品(多次LSP冲击)的表层微结构。试验结果和分析表明，多次LSP冲击能显著提高AISI 8620钢的耐磨性，并全面揭示了多次LSP冲击对AISI 8620钢的磨损机理。未抛光试件在多次LSP冲击下的磨损过程可描述为：滑动干磨损初期磨损率较大，抛光后磨损率下降，直至表面微凹痕消失。这种现象可以归因于多次LSP冲击在样品表面产生许多微压痕的事实。(C)2011爱思唯尔B.V.保留所有权利。
The aim of this paper was to address the effects of multiple laser shock processing (LSP) impacts with different pulse energy on mechanical properties and wear behaviors of AISI 8620 steel. Wear analyses were conducted by means of calculation of volume loss and scanning electron microscope (SEM) of the wear surface. Surface profiles, roughness and micro-hardness were measured. The micro-structures in the surface layer of the untreated and LSPed samples (treated by multiple LSP impacts) were investigated by using transmission electron microscopy (TEM) observations. Experimental results and analyses indicated that multiple LSP impacts can remarkably improve the wear resistance of AISI 8620 steel, and the wear mechanism of multiple LSP impacts on AISI 8620 steel was also entirely revealed. The wear process of the unpolished sample subjected to multiple LSP impacts can be described as follows: the wear rate was big at the beginning of sliding dry wear, but then decreased after the micro-indention in the sample surface was polished to the disappear. This phenomenon can be attributed to the fact that multiple LSP impacts generate many micro-indents in the sample surface. (C) 2011 Elsevier B.V. All rights reserved.