喷丸对TC4合金微弧氧化涂层磨损和腐蚀行为的影响

doi:10.11896/cldb.19090097

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Abstract The surface nanostructured film was prepared by shot peening (SP) on the surface of TC4 alloy.The ceramic layer was prepared in the electrolyte composed of NaH₂PO₄ and Na₂SiO₃ by micro-arc oxidation (MAO) constant voltage control mode, and the SP/MAO composite surface modified layer was obtained. The effects of shot peening on the microstructure, wear resistance and corrosion resistance of SP/MAO composite coatings were investigated. The results show that after shot peening, with the prolongation of shot peening time, the surface grain size of TC4 alloy decreases, while the microscopic strain and surface roughness increase gradually.The SP/MAO composite coating pretreated by shot peening for 30 min had the lowest friction coefficient and the wear rate was 71.3% lower than that of the micro-arc oxidation coating. With the prolongation of shot peening time,the corrosion potential of SP/MAO composite coating increased first and then decreased, and the corrosion current density decreased first and then increased. The SP/MAO coating had the best corrosion resistance when shot peening for 30 min.

Key words： TC4 alloy shot peening micro-arc oxidation wear resistance corrosion resistance

Published: 12 September 2020

CLC number:

TG146.2

Fund:This work was financially supported by the National Natural Science Foundation of China (51764041),Natural Science Foundation of Jiangxi Province (20161BAB216099).

About author:: Chao Ren, master student, Nanchang Hangkong University, major in materials engineering. Mainly engaged in metal material heat treatment and material surface modification research.
Junming Luo, professor, doctor. His research inte-rests include metal matrix composites, powder metallurgy materials and material surface modification research, He has published more than 80 papers,presided and participated in 30 scientific research projects of the national and provincial levels,and won 2 awards for scientific progress at the provincial and ministerial levels.

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	REN Chao
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	CHEN Yuhai
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Cite this article:

REN Chao,LUO Junming,CHEN Yuhai, et al. Effect of Shot Peening on Wear and Corrosion Behavior of Micro-arc Oxidation Coating of TC4 Alloy[J]. Materials Reports, 2020, 34(18): 18081-18085.

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http://www.mater-rep.com/EN/10.11896/cldb.19090097 OR http://www.mater-rep.com/EN/Y2020/V34/I18/18081

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