Micro-abrasive wear study of a low-temperature plasma nitrided Inconel 625 superalloy

IF 1.6 Q4 MATERIALS SCIENCE, COATINGS & FILMS

Tribology - Materials, Surfaces & Interfaces Pub Date : 2021-04-12 DOI:10.1080/17515831.2021.1898899

L. B. Varela, M.F.C. Ordoñez, C. Pinedo, A. P. Tschiptschin

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引用次数: 2

Abstract

ABSTRACT In this study, the microabrasive wear of a plasma nitrided Inconel 625 superalloy was studied. Nitrogen supersaturation in the expanded FCC layer promoted hardening due to the higher compressive residual stresses. The results showed the formation of a nitrided layer consisting of nitrogen expanded FCC phase (γN) and CrN nitride, respectively. Friction coefficient, mechanical failure mode and critical loads for damaging the nitrided case, using the linear scratch test, were carried out at a linearly increased normal force. The scratch test results showed that the nitrided layer strongly decreased the apparent friction coefficient in comparison with the non-nitrided alloy. Tensile cracking was the prevalent mechanical failure mode of the nitrided layer. Microabrasion results showed that the nitriding layer improving the wear resistance. For the nitrided samples, wear coefficients were determined for the nitrided layer and the substrate, indicating a change in the wear volume loss rate with the test distance. GRAPHICAL ABSTRACT

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低温等离子体氮化铬镍铁合金625的微磨损研究

本文研究了一种等离子体氮化铬镍铁合金625的微磨损。由于较高的压缩残余应力，膨胀FCC层中的氮过饱和促进了硬化。结果表明，形成了由氮膨胀FCC相（γN）和CrN氮化物组成的氮化层。使用线性划痕试验，在线性增加的法向力下进行了摩擦系数、机械失效模式和损伤氮化层的临界载荷。划痕试验结果表明，与未氮化合金相比，氮化层大大降低了表观摩擦系数。拉伸裂纹是氮化层的主要机械失效模式。微研磨结果表明，氮化层提高了耐磨性。对于氮化样品，测定了氮化层和基体的磨损系数，表明磨损体积损失率随测试距离的变化。图形摘要

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来源期刊

Tribology - Materials, Surfaces & Interfaces MATERIALS SCIENCE, COATINGS & FILMS-

CiteScore

2.80

自引率

0.00%

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