Effects of multiple laser shock processing (LSP) impacts on mechanical properties and wear behaviors of AISI 8620 steel

Lu, J. Z., Luo, K. Y., Dai, F. Z., Zhong, J. W., Xu, L. Z., Yang, C. J., Zhang, L., Wang, Q. W., Zhong, J. S., Yang, D. K. and Zhang, Y. K. 2012, Effects of multiple laser shock processing (LSP) impacts on mechanical properties and wear behaviors of AISI 8620 steel, Materials science and engineering : A, vol. 536, pp. 57-63.

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Title Effects of multiple laser shock processing (LSP) impacts on mechanical properties and wear behaviors of AISI 8620 steel
Author(s) Lu, J. Z.
Luo, K. Y.
Dai, F. Z.
Zhong, J. W.
Xu, L. Z.
Yang, C. J.
Zhang, L.
Wang, Q. W.
Zhong, J. S.
Yang, D. K.
Zhang, Y. K.
Journal name Materials science and engineering : A
Volume number 536
Start page 57
End page 63
Total pages 7
Publisher Elsevier S.A.
Place of publication Lausanne, Switzerland
Publication date 2012-02-28
ISSN 0921-5093
1873-4936
Keyword(s) friction
grain refinement
laser shock processing (LSP)
wear
Summary 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.
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2011, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30044360

Document type: Journal Article
Collection: Institute for Frontier Materials
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