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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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|
|Additional Information:||Copyright of this article belongs to Elsevier Science.|
|Department/Centre:||Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)|
|Date Deposited:||13 Nov 2009 10:35|
|Last Modified:||19 Sep 2010 05:29|
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