Correlation of roughness with surface properties of SS 304 and Inconel 718 substrates processed by plasma electrolytic polishing

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-02-01 DOI:10.1016/j.surfcoat.2025.131770

K. Sushil , A. Raj , S.K. Jha , J. Ramkumar , C. Chandraprakash

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引用次数: 0

Abstract

Although plasma electrolytic polishing (PeP) results in a superior surface finish, there are limited studies to establish the corresponding changes in the physical properties of the surface. We report the investigation on the changes in microstructural characteristics and the associated surface physical properties of SS 304 and Inconel 718 alloys, of identical initial roughness, due to processing by PeP. Optical profilometry revealed that PeP significantly reduced

R_{a}

from 0.238

μ

m to 0.048

μ

m for SS 304 and to 0.067

μ

m for Inconel 718, producing a smoother and optically more reflective surface. Elemental analysis established the relative changes in the chemical composition due to PeP. The tribology tests revealed a slight reduction in friction coefficient and wear rate. Microhardness tests have indicated a marginal decrease in Vicker hardness for both alloys. The reduction in static contact angle showed the increment in the surface wettability due to polishing. This work also establishes that PeP can be used to tune the physical properties of the surface.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.