Authors: Irene Calliari Marco Breda Emilio Ramous Katya Brunelli Marco Pizzo Cinzia Menapace
Publish Date: 2012/01/25
Volume: 21, Issue: 10, Pages: 2117-2123
Abstract
The aim of the present study is to investigate the impact toughness of a UNS 32760 SDSS in relation to the quantity of secondary phases precipitated after isothermal aging in the range of 850950 °C and for different exposure times The impact toughness has been investigated by means of instrumented impact testing using Charpy Vnotched specimens at room temperature The impact testing results show that for an amount of about 05 volume fraction of intermetallic phase the impact toughness is reduced by over 50 For volume fractions higher than 152 the impact toughness is definitively compromised and small entities of plastic deformations are enough to cause a prevailing brittle fracture mechanism By increasing the precipitates’ amounts the fracture mechanism shows an ever more prominent brittle behavior until 6 volume fraction exceeding which the ductile component is totally absent
Keywords: