Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma

Plasma ion nitriding is a flexible and multi-functional casehardening technique used in the given study for surface modifications of AISI M2 tool steel (0.9 C, 4.2 Cr, 5.0 Mo, 6.0 W, and 2.0 V). By varying the plasma treatment time from 1 to 4 hour and the filling gas pressure from 1 to 4 mbar, the...

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Main Authors: Naz, M.Y., Shukrullah, S., Ghaffar, A., Shakir, I., Ullah, S., Sagir, M., Pervaiz, M.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.26120 /
Published: Allerton Press Incorporation 2015
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925003943&doi=10.3103%2fS1068375515010093&partnerID=40&md5=88fd3289f8d6249ead0c805d4ed18a18
http://eprints.utp.edu.my/26120/
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spelling utp-eprints.261202021-08-30T08:52:24Z Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma Naz, M.Y. Shukrullah, S. Ghaffar, A. Shakir, I. Ullah, S. Sagir, M. Pervaiz, M. Plasma ion nitriding is a flexible and multi-functional casehardening technique used in the given study for surface modifications of AISI M2 tool steel (0.9 C, 4.2 Cr, 5.0 Mo, 6.0 W, and 2.0 V). By varying the plasma treatment time from 1 to 4 hour and the filling gas pressure from 1 to 4 mbar, the surface nitriding was carried out in the abnormal glow region of a pulsed DC discharge. Pre-plasma treatment heating of the samples was performed by a heating unit; the substrate temperature was raised to 500°C, with the ramping rate of 15°C. The resultant microscopic changes in the surface properties of the plasma treated tool steel were studied with different surface characterization techniques such as X-ray Diffraction, Scanning Electron Microscopy and Vickers�s micro-hardness testing. These investigations confirmed the formation of a compound layer on the plasma exposed surface. It was observed that the layer thickness initially increases and then decreases with nitriding time. Similar results were obtained for increasing filling gas pressure. The X-ray Diffraction results showed a down-shift in the original diffraction peaks, which confirms the nitrogen diffusion into the exposed surface and a compound layer formation. A significant improvement in the surface hardness was also vivid, which might be due to the nitrogen diffusion and the formation of a compound layer on the target surface. © 2015, Allerton Press, Inc. Allerton Press Incorporation 2015 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925003943&doi=10.3103%2fS1068375515010093&partnerID=40&md5=88fd3289f8d6249ead0c805d4ed18a18 Naz, M.Y. and Shukrullah, S. and Ghaffar, A. and Shakir, I. and Ullah, S. and Sagir, M. and Pervaiz, M. (2015) Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma. Surface Engineering and Applied Electrochemistry, 51 (1). pp. 58-64. http://eprints.utp.edu.my/26120/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Plasma ion nitriding is a flexible and multi-functional casehardening technique used in the given study for surface modifications of AISI M2 tool steel (0.9 C, 4.2 Cr, 5.0 Mo, 6.0 W, and 2.0 V). By varying the plasma treatment time from 1 to 4 hour and the filling gas pressure from 1 to 4 mbar, the surface nitriding was carried out in the abnormal glow region of a pulsed DC discharge. Pre-plasma treatment heating of the samples was performed by a heating unit; the substrate temperature was raised to 500°C, with the ramping rate of 15°C. The resultant microscopic changes in the surface properties of the plasma treated tool steel were studied with different surface characterization techniques such as X-ray Diffraction, Scanning Electron Microscopy and Vickers�s micro-hardness testing. These investigations confirmed the formation of a compound layer on the plasma exposed surface. It was observed that the layer thickness initially increases and then decreases with nitriding time. Similar results were obtained for increasing filling gas pressure. The X-ray Diffraction results showed a down-shift in the original diffraction peaks, which confirms the nitrogen diffusion into the exposed surface and a compound layer formation. A significant improvement in the surface hardness was also vivid, which might be due to the nitrogen diffusion and the formation of a compound layer on the target surface. © 2015, Allerton Press, Inc.
format Article
author Naz, M.Y.
Shukrullah, S.
Ghaffar, A.
Shakir, I.
Ullah, S.
Sagir, M.
Pervaiz, M.
spellingShingle Naz, M.Y.
Shukrullah, S.
Ghaffar, A.
Shakir, I.
Ullah, S.
Sagir, M.
Pervaiz, M.
Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma
author_sort Naz, M.Y.
title Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma
title_short Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma
title_full Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma
title_fullStr Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma
title_full_unstemmed Surface morphology and mechanical strength of AISI M2 tool steel treated in abnormal glow region of plasma
title_sort surface morphology and mechanical strength of aisi m2 tool steel treated in abnormal glow region of plasma
publisher Allerton Press Incorporation
publishDate 2015
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925003943&doi=10.3103%2fS1068375515010093&partnerID=40&md5=88fd3289f8d6249ead0c805d4ed18a18
http://eprints.utp.edu.my/26120/
_version_ 1741197086454448128
score 11.62408

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