AccScience Publishing / MSAM / Volume 3 / Issue 4 / DOI: 10.36922/msam.4974
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ORIGINAL RESEARCH ARTICLE

Microstructure and wear characteristics of austenitic stainless steel coatings fabricated through various directed energy deposition

Rui Deng1 ,  Runze Wei1,2 ,  Jianguo Liang3 ,  Chunjiang Zhao1,4* ,  Qiaofeng Bai1 ,  Huan Li1 ,  Changyao Ouyang1 ,  Xiaoyu Wu4 ,  Yicha Zhang5
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1 School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi, China
2 College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi, China
3 College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China
4 College of Intelligent Manufacturing Industry, Shanxi Electronic Science and Technology Institute, Linfen, Shanxi, China
5 Laboratory of Automation, Mechanics, and Industrial and Human Computing, UMR 8201, CNRS; INSA Hauts-de-France, University of Polytechnique Hauts-de-France, Valenciennes, France
MSAM 2024, 3(4), 4974 https://doi.org/10.36922/msam.4974
Submitted: 27 September 2024 | Accepted: 4 November 2024 | Published: 27 November 2024
© 2024 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
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Abstract

Austenitic stainless steels are widely used in automotive and marine environments because of their high toughness, corrosion resistance, and wear resistance. The present comparative study focuses on the microstructure and wear resistance of double-layer austenitic stainless-steel coatings prepared on a ductile iron substrate using circular spot high-speed laser-directed energy deposition (DED) and broad-beam laser-DED. The results indicate that while the deposition process does not alter the physical phase of coating, it does influence the preferred orientation of surface grains. Both coatings exhibit characteristics of hypoeutectic alloys, where the harder eutectic structure serves as a skeleton to resist external pressure. The high-speed laser-DED coating demonstrates higher hardness and wears resistance due to its denser eutectic structure. In addition, its finer microstructure produces smaller wear debris, contributing to the formation of a denser oxide film, thereby enhancing wear resistance.

Keywords
High-speed laser directed energy deposition
Austenitic stainless steel
Broad-beam laser directed energy deposition
Wear resistance
Funding
This work is supported by the National Natural Science Foundation of China (No. 52275358), Shanxi Provincial Key Research and Development Project, China (202202050201017), Central Guidance Local Science and Technology Development Project, China (YDZJSX20231A048), Doctoral Start-up Funds, Taiyuan University of Science and Technology, China (20232085), and Major Scientific and Technological Special Project of Shanxi Province, China (202201150401019).
Conflict of interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this work.
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Materials Science in Additive Manufacturing, Electronic ISSN: 2810-9635 Published by AccScience Publishing
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