期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.12.053
关键词
Laser shock processing (LSP); Wear; Friction; Grain refinement
类别
资金
- National Natural Science Foundation of China [51105179, 50735001]
- Natural Science Foundation of Jiangsu Province in China [BK2010352, BK2011478]
- National Science Foundation for Post-doctoral Scientists of China [20110491349]
- College Industrialization Project of Jiangsu Province [JHB2011-38]
- Jiangsu Postdoctoral Science Foundation in China [1101018B]
- Open Foundation for Key Laboratory of Modern Agricultural Equipment and Technology [NZ201007]
- Natural Science Foundation of the Jiangsu Higher Education Institutions in China [10KJB460001]
- Talent Foundation of Jiangsu University in China [11JDG061]
- Innovation Program of Graduated Student of Jiangsu Province in China [CX10B250Z]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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.
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