Extracting Materials Properties from Crackling Noise and Slip-Avalanche Statistics of Slowly-Sheared Materials
Karin Dahmen (University of Illinois), Xie Xie (University of Tennessee), James Antonaglia (University of Illinois at Urbana Champaign), Marina Laktionova (), Elena Tabachnikova (), Zhi Tang (), Junwei Qiao (), Jien-Wei Yeh (), Che Wei Tzai (), Yong Zhang (), Jonathan Uhl (), Peter Liaw ()
Instability in Solids and Structures
Mon 4:20 - 5:40
Barus-Holley 190
The deformation processes of many solid materials are not continuous, but discrete, with intermittent slip events, visible as serrations in the stress-strain curves. Here, we show how the statistics of these serrations can be used to obtain new information about material properties. We demonstrate how a simple model suggests that the slip-event size distributions follow approximately the same power-law statistics for compressed nano-crystals and amorphous materials, and show its predictions for the dependence of strain rate and temperature. We discuss applications of the theory to recent experiments on bulk metallic glasses (BMGs), and an Al0.5CoCrCuFeNi high-entropy alloy (HEA) from room temperature to a cryogenic temperature of 4.2 K. Pertinent implications are discussed for a broad range of systems. Acknowledgements: PKL appreciates the financial support from the US National Science Foundation (DMR-0909037, CMMI-0900271, and CMMI-1100080), the Department of Energy (DOE), Office of Nuclear Energy’s Nuclear Energy University Program (NEUP) 00119262, and the DOE, Office of Fossil Energy, National Energy Technology Laboratory (DE-FE-0008855) with C. Huber, C. V. Cooper, D. Finotello, A. Ardell, E. Taleff, V. Cedro, R. O. Jensen, L. Tan, and S. Lesica as contract monitors. KAD acknowledges the NSF grants DMR-1005209 and DMS-1069224. YZ appreciates the financial support from the National Natural Science Foundation of China (Nos. 51010001 and 51001009), 111 Project (B07003), and the Program for Changjiang Scholars and the Innovative Research Team of the University.