A study on the nature of the compound layer formed during the ion nitriding of En40B steel

Kurny, ASW and Mallya, RM and Rao, M Mohan (1986) A study on the nature of the compound layer formed during the ion nitriding of En40B steel. In: Materials Science and Engineering, 78 (1). pp. 95-100.

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Abstract

Commercial-grade En40B steel has been ion nitrided in the temperature range 475–550°C in a 25%N2–75%H2 gas mixture. The nature of the compound layer formed was studied by the X-ray diffraction technique and optical metallography. It was observed that the structure of the compound layer gradually transforms from a predominantly epsilon (Porson) nitride to a predominantly γ′ nitride structure with increasing treatment time. Optical metallography studies on sections orthogonal to the nitrided surface showed that, after about 5 h of treatment, the thickness of the compound layer decreases with further increase in treatment time.

Item Type:	Journal Article
Publication:	Materials Science and Engineering
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	22 Jan 2010 09:42
Last Modified:	19 Sep 2010 05:42
URI:	http://eprints.iisc.ac.in/id/eprint/22579

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