Significant strengthening of nanocrystalline Ni sub-micron pillar by cyclic loading in elastic regime

Lee, Jung-A and Lee, Dong-Hyun and Seok, Moo-Young and Choi, In-Chul and Han, Heung Nam and Tsui, Ting Y and Ramamurty, Upadrasta and Jang, Jae-il (2017) Significant strengthening of nanocrystalline Ni sub-micron pillar by cyclic loading in elastic regime. In: SCRIPTA MATERIALIA, 140 . pp. 31-34.

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Abstract

The influence of cyclic load, with the maximum stress well within the elastic regime, on the strength of nanocrystalline (nc) nickel was investigated through quasi-static compression experiments on cyclic-loaded sub-mu m-sized pillars, fabricated through electron beam lithography and electroplating. Results show that prior-cycling enhances both yield and flow strengths of nc Ni without significant loss in plasticity. Changes in strain-rate sensitivity and activation volume for deformation upon cycling were measured and utilized to discuss possible mechanisms responsible for the observed strengthening. (C) 2017 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	SCRIPTA MATERIALIA
Additional Information:	Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	16 Sep 2017 06:31
Last Modified:	16 Sep 2017 06:31
URI:	http://eprints.iisc.ac.in/id/eprint/57777

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