Effect of Plasma Nitriding on Mechanical Properties of Tensile Specimen of 25Cr2Ni4W Low Alloy Steel

Issues » Volume 48, Issue 4

O. Hamidane$^{1,2}$, B. Chermime$^{1,2}$, M. M. Alim$^{3}$, M. Fellah$^{1}$

$^{1}$Department of Mechanical Engineering, University Abbes Laghrour, Khenchela-40000, Algeria
$^{2}$Advanced Materials Science and Engineering Laboratory ISMA, Khenchela-40000, Algeria
$^{3}$Centre for the Development of Advanced Technologies (CDTA), City 20 August 1956, B. P. 17, Baba Hassan, Algiers, Algeria

Received: 14.10.2025; final version - 10.03.2026. Download: PDF

This study investigates the effect of plasma nitriding on the tensile specimens of 25Cr2Ni4W low-alloy steel, aiming to enhance their mechanical and tribological surface properties. The experimental analysis compares treated and untreated specimens to evaluate the influence of nitrogen diffusion on the material performance. Results reveals that plasma nitriding led to an increase in elastic resistance (R_e) and a decrease in plastic resistance (R_p), attributed to self-induced heating during treatment. Optical microscopy (OM) confirmed the formation of a distinct nitride layer on the treated surface. The enhancement of the elastic phase contributes to an increase in elongation (L₁), indicating improved ductility. Furthermore, nanoindentation tests demonstrate a significant rise in nanohardness for the nitrided samples compared to the untreated ones, confirming the strengthening effect of nitrogen incorporation and nitride phase formation.

Key words: plasma nitriding, tensile specimen, plastic resistance, elastic resistance, nanohardness, low-alloy steel.

URL: https://mfint.imp.kiev.ua/en/abstract/v48/i04/0407.html

DOI: https://doi.org/10.15407/mfint.48.04.0407

PACS: 52.77.-j, 61.72.Ff, 62.20.Qp, 68.35.Dv, 81.40.Ef, 81.65.Lp, 81.70.Bt

Citation: O. Hamidane, B. Chermime, M. M. Alim, and M. Fellah, Effect of Plasma Nitriding on Mechanical Properties of Tensile Specimen of 25Cr2Ni4W Low Alloy Steel, Metallofiz. Noveishie Tekhnol., 48, No. 4: 407–417 (2026)

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