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Significant strengthening of nanocrystalline Ni sub-micron pillar by cyclic loading in elastic regime
- Authors
- Lee, Jung-A; Lee, Dong-Hyun; Seok, Moo-Young; Choi, In-Chul; Han, Heung Nam; Tsui, Ting Y.; Ramamurty, Upadrasta; Jang, Jae-il
- Issue Date
- Nov-2017
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Nanocrystalline metals; Micro-compression test; Cyclic loading
- Citation
- SCRIPTA MATERIALIA, v.140, pp.31 - 34
- Indexed
- SCIE
SCOPUS
- Journal Title
- SCRIPTA MATERIALIA
- Volume
- 140
- Start Page
- 31
- End Page
- 34
- ISSN
- 1359-6462
- 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.
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Related Researcher
- Jang, Jae Il
- COLLEGE OF ENGINEERING (SCHOOL OF MATERIALS SCIENCE AND ENGINEERING)