Millisecond laser processing of Cu-Zr-Ag-Al bulk metallic glass with single pulses

Abstract

Influence of laser emission on a Zr46 (Cu4/5Ag1/5)46Al8 amorphous alloy was analyzed in the paper. A sample was exposed to single laser pulse impact of millisecond duration (3 ms) with 3 J energy. Subsequent research was performed with methods of autoelectronic emission scanning electronic microscopy and X-ray diffraction (XRD). In a COMSOL Multiphysics 5.2 package computer modeling of temperature fields generated by laser emission was performed. Crater topological singularities resulting from laser impact were explained in the paper. A specific role of atomic oxygen at nanocrystals forming was determined. Among other things it was demonstrated that manipulation with external factors such as presence of surface active agents (for example, oxygen) and cooling rate control can be used for production of amorphous composites with a preprogrammed structure