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|Title:||Statistical nature of the incipient plasticity in amorphous alloys||Authors:||Nag, Shankha
Narayan, R. L.
|Keywords:||Engineering::Mechanical engineering||Issue Date:||2020||Source:||Nag, S., Narayan, R. L., Jang, J., Mukhopadhyay, C. & Ramamurty, U. (2020). Statistical nature of the incipient plasticity in amorphous alloys. Scripta Materialia, 187, 360-365. https://dx.doi.org/10.1016/j.scriptamat.2020.06.045||Journal:||Scripta Materialia||Abstract:||Statistical analyses of the first pop-in stress data, obtained by spherical tip-nanoindentation experiments on different metallic glasses (MGs) with tip radius, Ri, loading rate,P˙, 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 Ri and P˙ 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://hdl.handle.net/10356/162009||ISSN:||1359-6462||DOI:||10.1016/j.scriptamat.2020.06.045||Rights:||© 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||MAE Journal Articles|
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