Abstract
The relationship between the load-displacement curve and the microfeatures of the fracture surface of Ag-alloys was investigated using the precracked test pieces.
When the distribution density of I-type dimples was low, the local plastic deformation that was initiated at the precrack tip field showed large values. The mechanical strength was related to the slip bands in the I-type dimples.
The needle-like phases in the matrix of Ag-Cu alloys became fine or were decreased by adding iridium or rhodium; II-type dimples also decreased. The ductility of the alloys was moderately improved.
