Wear behavior of modified surface layer produced by TIG melting of preplaced Ti powder in nitrogen environment

Mridha, Shahjahan and Dyuti, S. and Shaha, S.K. (2011) Wear behavior of modified surface layer produced by TIG melting of preplaced Ti powder in nitrogen environment. Advanced Materials Research, 264-26. pp. 1427-1432. ISSN 1662-8985

PDF (Wear behavior of modified surface layer produced by TIG melting of preplaced Ti powder in nitrogen environment) - Accepted Version Restricted to Repository staff only until 2012. Download (1MB) | Request a copy

Abstract

The formation of hard surface layer on steel provides a protective coating against wear, thermal loads and corrosion. In the present work a hard composite layer is formed on steel surfaces by preplacement of titanium powder and melted under nitrogen environment. Surface melting was conducted using TIG torch with different energy inputs. The microstructure and the morphology of the melt tracks were investigated using SEM and X-ray diffraction. The in-situ melting of titanium powder in nitrogen atmosphere produced dendritic microstructure of titanium nitride. The melt layer contained dispersed TiN, Ti2N dendrites highly populated at the surface compared to the deeper melt and gave a maximum surface hardness of around 1927 Hv. The wear property of the melt track was investigated using pin-on-disk tribometer at room temperature. The modified surface layer gave a low friction value of 0.12 and wear rate of 0.007895 ×10-4 compared to 1.648 × 10-4 mm3/N/m for the uncoated steel surface.

Item Type:	Article (Journal)
Additional Information:	3925/5482
Uncontrolled Keywords:	Composite layer, Titanium nitride, Hardness, Friction, Wear resistance
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN600 Metallurgy
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering
Depositing User:	Prof. Dr. Shahjahan Mridha
Date Deposited:	28 Oct 2011 15:56
Last Modified:	27 Jun 2013 15:57
URI:	http://irep.iium.edu.my/id/eprint/5482

Actions (login required)

View Item