Statistical nature of the incipient plasticity in amorphous alloys
- Title
- Statistical nature of the incipient plasticity in amorphous alloys
- Author
- 장재일
- Keywords
- Metallic glass; Plastic deformation; Nanoindentation; Statistics; Bimodal distribution
- Issue Date
- 2020-10
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- SCRIPTA MATERIALIA, v. 187, page. 360-365
- Abstract
- Statistical analyses of the first pop-in stress data, obtained by spherical tip-nanoindentation experiments on different metallic glasses (MGs) with tip radius, R-i, loading rate, (P) over dot, and structural state of the glass as experimental variables, show that the 3-parameter bimodal Weibull distribution best captures the stochastic nature of the incipient plastic strengths. Significant bimodality in the strength distributions was observed only when a larger R-i and (P) over dot are employed. We hypothesize that the stress required for shear band nucleation has to exceed a critical value over a characteristic distance over which the stress gradients are minimum to rationalize the bimodality.
- URI
- https://www.sciencedirect.com/science/article/pii/S1359646220304103?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/172026
- ISSN
- 1359-6462; 1872-8456
- DOI
- 10.1016/j.scriptamat.2020.06.045
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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