Enhancing dry sliding wear resistance of high-Mn austenitic steel by adding N

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2024-11-08 DOI:10.1016/j.wear.2024.205635

Xiaohong Hao , Haolong Wang , Xiaowen Sun , Yuefeng Wang , Fucheng Zhang , Jing Zhao , Tiansheng Wang

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引用次数: 0

Abstract

In this study, the wear resistance of two high-Mn austenitic steels, i.e., Fe−18.5Mn−7Cr−0.6C and Fe−18.5Mn−7Cr−0.6C−0.21N was tested in dry sliding friction on a disc friction and wear testing machine (MMU-5G). The wear behavior and microstructure evolution of the two tested steels were investigated. The results revealed that adding N enhanced the wear resistance of high-Mn austenitic steel due to the synergistic effects of hardness, wear hardening, and oxide layer. Interstitial N atoms increased the matrix hardness and decreased the stacking fault energy (SFE). The lower SFE facilitated wear hardening, and the active mechanical twins along with the higher dislocation density induced the formation of a thicker nanocrystalline layer with finer grains. The nanocrystalline layer with higher surface activity promoted the adsorption of a protective oxide layer. These factors decreased the surface roughness, coefficient of friction (COF), and wear rate of N-alloyed high-Mn austenitic steel. This study provided valuable insights into the application of N-alloyed high-Mn austenitic steels under dry sliding friction conditions.

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通过添加 N 增强高锰奥氏体钢的干滑动耐磨性

本研究在圆盘摩擦磨损试验机（MMU-5G）上测试了两种高锰奥氏体钢（即 Fe-18.5Mn-7Cr-0.6C 和 Fe-18.5Mn-7Cr-0.6C-0.21N）在干滑动摩擦中的耐磨性。研究了两种测试钢的磨损行为和微观结构演变。结果表明，由于硬度、磨损硬化和氧化层的协同作用，添加 N 增强了高锰奥氏体钢的耐磨性。间隙 N 原子提高了基体硬度，降低了堆积断层能（SFE）。较低的堆叠断层能促进了磨损硬化，而活跃的机械孪晶和较高的位错密度促使形成了具有较细晶粒的较厚纳米晶层。表面活性较高的纳米晶层促进了保护性氧化层的吸附。这些因素降低了 N 合金高锰奥氏体钢的表面粗糙度、摩擦系数（COF）和磨损率。这项研究为 N 合金高锰奥氏体钢在干滑动摩擦条件下的应用提供了宝贵的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.