Time-dependent nanoscale plasticity in nanocrystalline nickel rods and tubes

Lee, Jung-A and Seo, Brandon B and Choi, In-Chul and Seok, Moo-Young and Zhao, Yakai and Jahed, Zeinab and Ramamurty, Upadrasta and Tsui, Ting Y and Jang, Jae-il (2016) Time-dependent nanoscale plasticity in nanocrystalline nickel rods and tubes. In: SCRIPTA MATERIALIA, 112 . pp. 79-82.

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Abstract

Time-dependent nanoscale plasticity of nanocrystalline nickel at room temperature was critically explored through a series of micropillar creep and quasi-static compression experiments on rod and tube specimens fabricated by electron beam lithography and electroplating. Enhanced creep rates in tubes as compared to rods, establishes the facilitating role played by the free surface in time-dependent deformation. Creep stress exponent, n, and strain-rate sensitivity, m, were compared to examine connections between creep and the rate-dependent plasticity, if any. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	SCRIPTA MATERIALIA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords:	Nanocrystalline Ni; Time-dependent plasticity; Microcompression; Creep; Strain-rate sensitivity
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	30 Dec 2015 05:57
Last Modified:	30 Dec 2015 05:57
URI:	http://eprints.iisc.ac.in/id/eprint/52925

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