Abstract
The fracture mechanism of the castings made from Ag-binary-alloys (Ag-Pd and Ag-Cu) was investigated by tensile tests, microfractography, microstructure observation and X-ray microanalyses.
I-type dimples were formed by grain boundary brittle fracture and its propagation. They occupied the greater part of the fracture surface of single phase alloy that showed high ductility.
II-type dimples were observed very numerously on the fracture surface of binary phase alloy that showed high mechanical strength and small elongation, and somewhat numerously on the single phase alloys that showed higher mechanical strength than the others. II-type dimples seemed to be formed by the accumulation of dislocations, and their number was related to the mechanical properties of the alloys.
