Structural Characterization of Ion Nitrided 316L Austenitic Stainless Steel: Influence of Treatment Temperature and Time

Gokcekaya, Ozkan; Ergun, Celaletdin; Gulmez, Turgut et al.

Metals, 2022, 12(2), 306

Number of Access:558（2025-08-21 04:38 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89756

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Title
Structural Characterization of Ion Nitrided 316L Austenitic Stainless Steel: Influence of Treatment Temperature and Time
Creator
CreatorName
Gokcekaya, Ozkan
CreatorName
Ergun, Celaletdin
CreatorName
Gulmez, Turgut
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
CreatorName
Nakano, Takayoshi
CreatorName
Yilmaz, Safak
Subject
316L stainless steel
Ion nitriding
Nitride layer
Phase composition
Surface hardness
Description
Gokcekaya O., Ergun C., Gulmez T., et al. Structural Characterization of Ion Nitrided 316L Austenitic Stainless Steel: Influence of Treatment Temperature and Time. Metals, 12, 2, 306. https://doi.org/10.3390/met12020306.
Abstract
The ion nitriding behavior of AISI 316L austenite stainless steel was investigated at different nitriding times (2 h, 4 h, and 9 h) and temperatures (450◦ C, 500◦ C, and 550◦ C). The structural characterization has been assessed by several considerations which can be listed: (i) the evaluation of phase distribution through Rietveld analysis of X-ray diffraction patterns and accompanying peak fitting process, (ii) hardness profile and related nitride layer thickness by microhardness and micro-scopic measurements, and (iii) displacement measurements to assess the residual stress accumulation. The diffusion of nitrogen atomic species into the sample surface caused a transformation of the γ phase matrix into an expanded austenite (γN ) phase, which is recognized with its high hardness and wear resistance. Furthermore, depending on the nitriding condition, chromium nitride (Cr1-2 N) and iron nitride (ε-Fe2-3 N and γ′-Fe4 N) phases were detected, which can be detrimental to the corrosion resistance of the 316L austenite stainless steel. The γN phase was observed in all nitriding conditions, resulting in a significant increase in the surface hardness. However, decomposition of the γN phase with an increase in nitriding temperature eventually altered the surface hardness distribution in the nitriding layer. Considering the phase-type and distribution with the consequent hardness characteristics in the nitride layer, to our best knowledge, this is the first report in which an ion-nitriding temperature of 500◦ C (higher than 450◦ C) and time of 9 h can be proposed as ideal processing parameters leading to optimal phase composition and hardness distribution for 316L austenite stainless steels particularly for the applications requiring a combination of both wear and corrosion resistance.
Publisher
MDPI
Source Title
Metals
Volume (Issue)
12(2)
Page
306
Date of Issued
2022-02-10
Language
English
Handle URL
https://hdl.handle.net/11094/89756
eISSN
20754701
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.3390/met12020306
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article