|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIX
||Statistical Analysis on Single Versus Successive Pop-ins in Nanoindentation Tests of Zr-based Bulk Metallic Glass
||Priyanka Saini, Upadrasta Ramamurty, Jae-il Jang, R.L. Narayan
|On-Site Speaker (Planned)
3-parameter bimodal Weibull distribution best captures the stochastic nature of incipient plasticity in bulk metallic glasses (BMGs). The present study studies successive pop-in events in the load, P, vs. displacement, h, curve which describe further evolution of plasticity in BMGs. Statistical tools like maximum likelihood estimates and Akaike information criterion are extracted from indentation data for the first 3 pop-ins in the P-h curves. It was observed that while the 2<sup>nd</sup> and 3<sup>rd</sup> pop-in load distribution is also modelled by the 3-parameter Weibull distribution, the parameters undergo a significant change from that observed for the 1<sup>st</sup> pop-in load distribution. The effect of structural state and the size of the indenter were also considered to discuss the formation of subsequent shear bands in BMGs.
||Mechanical Properties, Nanotechnology, Other