An innovative device for the mechanical testing of miniature specimens of superalloys

Abstract

A new miniature test system has been used to investigate the high temperature mechanical and physical characterics of superalloys. Different types of mechanical test - static and dynamic loading and multihit tests were used to follow softening during recrystallisation at high temperature. The kinetics of recrystallisation were studied by analyzing the recovery of strength in multihit elevated temperature tests through calculations of apparent activation energy. Measurements of resistivity were used, in addition, to throw light on the internal microstructural state of the alloys.