Instrumented indentation of a Pd-based bulk metallic glass: Constant loading-rate test vs constant strain-rate test
- Authors
- Yoo, Byung-Gil; Lee, Kyung-Woo; Jang, Jae-il
- Issue Date
- Aug-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Metallic glasses; Nanoindentation; Strain rate; Hardness
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.483, no.1-2, pp.136 - 138
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 483
- Number
- 1-2
- Start Page
- 136
- End Page
- 138
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/176453
- DOI
- 10.1016/j.jallcom.2008.07.163
- ISSN
- 0925-8388
- Abstract
- Most of the previous nanoindentation experiments on bulk metallic glasses (BMGs) were made under a constant 'loading rate,' although 'strain rate' is a more useful parameter than loading rate to analyze the inhomogeneous plasticity in the BMG according to the classic free-volume theory. Here, we explore the strain-rate dependency of plastic characteristics in a Pd-based BMG through nanoindentation tests under a variety of constant strain rates(0.01-0.25 s(-1)). The results are compared with those from nanoindentations under various constant loading rates (0.05-5 mN/s) and discussed in terms of the influences of strain rate on the plastic flow characteristics in the BMG.
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