Microstructural development in microsecond pulsed laser elted polycrystalline nickel

Swamy, VT and Ranganathan, S and Chattopadhyay, K (1992) Microstructural development in microsecond pulsed laser elted polycrystalline nickel. In: Journal of Materials Science, 27 (5). 1375 -1379.

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Abstract

The microsecond Nd glass pulsed laser interaction with olycrystalline nickel was studied with particular emphasis on melting and the nature of the microstructural development following irradiation. The change in the melt pool shape and the melting efficiency as a function of the total laser power has been determined. Evidence is presented to show that for low energy pulse, the microstructural development accompanies fresh nucleation of grains and leads to a finer grain size than that of the substrate. At a higher energy level, growth competition leads to a coarser grain size. We also report a banded feature roughly parallel to the melt substrate interface that develops in the resolidified region during high energy interaction. These results are discussed in the light of our present understanding of rapid solidification processes.

Item Type:	Journal Article
Publication:	Journal of Materials Science
Publisher:	Springer Netherlands
Additional Information:	Copyright of this article belongs to Springer Netherlands.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	19 Sep 2006
Last Modified:	19 Sep 2010 04:30
URI:	http://eprints.iisc.ac.in/id/eprint/8168

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