Mohanty, Shalini, Dwivedi, Suryank, Tiwari, Tanmay, Dixit, Amit Rai and Rakurty, Chandra Sekhar (2026) Heat treatment effects on electroless Ni-P coatings for AZ31-Mg alloy. Manufacturing Letters, 49 (Suppl.). pp. 1769-1775. ISSN 2213-8463 (Online) (doi:10.1016/j.mfglet.2026.08.08)

Preview

PDF (Open Access Article) 54630 MOHANTY_Heat_Treatment_Effects_On_Electroless_Ni-P_Coatings_For_AZ31-Mg_Alloy_(OA)_2026.pdf - Published Version Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (1MB) | Preview

Abstract

AZ31 magnesium alloy is widely used in aerospace, automotive, biomedical, and electronics applications due to its strength-to-weight ratio, formability, and low cost. However, its inherent limitations, such as poor corrosion resistance, surface softness, and biodegradability, pose challenges for machining and functional deployment. This preliminary study investigates the enhancement of surface integrity and machining-relevant properties through electroless Ni-P composite coatings incorporating solid lubricants (WS2, MoS2) and hard ceramic particles (Al2O3) in a chemically deposited bath. The coatings were evaluated for micro-hardness, wear resistance, and tribological performance using micro-scratch testing under machining-like conditions, followed by a 1-hour heat treatment at 350°C to tailor surface characteristics. Results showed significant improvements in micro-hardness (from 122.51 ± 3.67 HV to 370.86 ± 11.13 HV) and controlled variations in the coefficient of friction (COF), highlighting the coating’s effect on surface durability under simulated tribo-mechanical loading. The study provides a comparative assessment of surface integrity, microhardness, and tribological behaviour of electroless Ni-P composite coatings before and after heat treatment. The findings offer preliminary insights into the potential of such composite coatings for applications requiring improved wear resistance and reduced friction.

Item Type:	Article
Uncontrolled Keywords:	coatings, solid lubricant, alumina, heat treatment, electroless plating
Subjects:	Q Science > Q Science (General) T Technology > T Technology (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	06 Oct 2026 14:55
URI:	https://gala.gre.ac.uk/id/eprint/54630

Actions (login required)

View Item

Downloads