Microstructural evolution and mechanical characteristics in nanocrystalline nickel with a bimodal grain-size distribution

Prasad, MJNV and Suwas, S and Chokshi, AH (2009) Microstructural evolution and mechanical characteristics in nanocrystalline nickel with a bimodal grain-size distribution. In: International Symposium on Bulk Nanostructured Materials: from Fundamentals to Innovation, BNM 2007, AUG 14-18, 2007, Ufa State Aviat Tech Univ, Ufa, Russia, pp. 86-91.

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Abstract

An attractive microstructural possibility for enhancing the ductility of high-strength nanocrystals is to develop a bimodal grain-size distribution, in which the fine grains provide strength, and the coarser grains enable strain hardening. Annealing of nanocrystalline Ni over a range of temperatures and times led to microstructures with varying volume fractions of coarse grains and a change in texture. Tensile tests revealed a drastic reduction in ductility with increasing volume fraction of coarse grains. The reduction in ductility may be related to the segregation of sulphur to grain boundaries.

Item Type:	Conference Paper
Publication:	Materials Science and Engineering: A
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Nano;Nickel;Texture;Grain growth;Strength;Ductility
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	13 Nov 2009 10:35
Last Modified:	19 Sep 2010 05:29
URI:	http://eprints.iisc.ac.in/id/eprint/19637

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