Shear avalanches in plastic deformation of a metallic glass composite

摘要: Abstract Changes in intermittent shear avalanches during plastic deformation of a Cu50Zr45Ti5 (atomic percent) alloy response to variant structures including fully glassy phase and/or nanocrystal/glass binary are investigated. Second crystalline phases introduced into the glassy-phase matrix metallic glass interfere with shear-avalanche process, which can release shear–strain concentration, and then tune critically-dynamic behavior avalanche. By combining microstructural observations nanocrystals statistical analysis corresponding behavior, we determine statistic distribution sizes deformation, established its dependence on geometric nanocrystals. The scaling follows power–law relation accompanied by an exponentially-decaying function pure glass, containing small nanocrystals, be described mean-field theory. large events dominated structural tuning-parameters, i.e., resistance banding, size volume fraction second glasses.