Page 46 - MSAM-3-4

Materials Science in

Additive Manufacturing

ORIGINAL RESEARCH ARTICLE
Microstructure and wear characteristics of

austenitic stainless steel coatings fabricated
through various directed energy deposition

1
1,4
3
Rui Deng , Runze Wei , Jianguo Liang , Chunjiang Zhao * , Qiaofeng Bai ,
1
1,2
Huan Li , Changyao Ouyang , Xiaoyu Wu , and Yicha Zhang 5
1
1
4
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

Abstract

*Corresponding author: Austenitic stainless steels are widely used in automotive and marine environments
Chunjiang Zhao
(chunjiangzhao@tyust.edu.cn) because of their high toughness, corrosion resistance, and wear resistance. The
present comparative study focuses on the microstructure and wear resistance of
Citation: Deng R, Wei R, Liang J, double-layer austenitic stainless-steel coatings prepared on a ductile iron substrate
et al. Microstructure and wear
characteristics of austenitic using circular spot high-speed laser-directed energy deposition (DED) and broad-
stainless steel coatings fabricated beam laser-DED. The results indicate that while the deposition process does not alter
through various directed energy the physical phase of coating, it does influence the preferred orientation of surface
deposition. Mater Sci Add Manuf.
2024;3(4):4974. grains. Both coatings exhibit characteristics of hypoeutectic alloys, where the harder
doi: 10.36922/msam.4974 eutectic structure serves as a skeleton to resist external pressure. The high-speed
Received: September 27, 2024 laser-DED coating demonstrates higher hardness and wears resistance due to its
denser eutectic structure. In addition, its finer microstructure produces smaller wear
1st revised: October 18, 2024

debris, contributing to the formation of a denser oxide film, thereby enhancing wear
2nd revised: October 30, 2024 resistance.
Accepted: November 4, 2024
Published Online: November 27, Keywords: High-speed laser directed energy deposition; Austenitic stainless steel; Broad-
2024 beam laser directed energy deposition; Wear resistance
Copyright: © 2024 Author(s). This
is an Open-Access article
distributed under the terms of the
Creative Commons Attribution
License, permitting distribution, and 1. Introduction
reproduction in any medium,
provided the original work is Ductile iron (DI) is characterized by high strength, toughness, and low cost due
properly cited. to its unique spherical graphite, making it an ideal material for critical mechanical
1,2
Publisher’s Note: AccScience components, such as engines, piston rods, and cylinders. However, the harsh working
Publishing remains neutral with conditions that these parts are frequently subjected to – such as high pressure, high
regard to jurisdictional claims in
published maps and institutional a loads, and alternating stresses—cause surface wear and corrosion, which shortens the
iliations. equipment’s lifespan. Therefore, surface repair and remanufacturing of cast iron parts is

Volume 3 Issue 4 (2024) 1 doi: 10.36922/msam.4974