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Hydrogen-induced softening in nanocrystalline Ni investigated by nanoindentation

Title
Hydrogen-induced softening in nanocrystalline Ni investigated by nanoindentation
Author
장재일
Keywords
Nanocrystals; nanoindentation; hydrogen
Issue Date
2016-11
Publisher
TAYLOR & FRANCIS LTD
Citation
PHILOSOPHICAL MAGAZINE, v. 96, NO 32-34, Page. 3442-3450
Abstract
The influence of hydrogen on the plastic deformation of nanocrystalline nickel was analysed by recourse to nanoindentation on the uncharged and hydrogen-charged samples. It was revealed that, in nanocrystalline Ni, hydrogen significantly decreases hardness but does not alter the strain rate sensitivity. Through thermal desorption spectroscopy measurement, charged hydrogen was expected to reside in face-centred cubic lattice, grain boundaries (GBs) and vacancies rather than dislocations. The hydrogen-induced softening behaviour is discussed in terms of the possible roles of hydrogen in GB-assisted dislocation flow mechanism.
URI
https://www.tandfonline.com/doi/abs/10.1080/14786435.2016.1159743https://repository.hanyang.ac.kr/handle/20.500.11754/101258
ISSN
1478-6435; 1478-6443
DOI
10.1080/14786435.2016.1159743
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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