|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Refractory Metals 2020
||Thermally Activated Deformation Processes in W-Re Alloys
||Verena Maier-Kiener, Johann Kappacher, Daniel Kiener, Helmut Clemens
|On-Site Speaker (Planned)
In this study, we investigate the influence of Re on mechanical properties in W-alloys by combining static heat treatments and high resolution imaging and in-situ high temperature nanoindentation experiments.to
Three different alloy compositions were tested, commercially pure W as well as W5Re and W10Re. The alloys were examined in two different microstructural conditions, recrystallized coarse grained as well as ultra-fine grained. The latter one was achieved through high pressure torsion. Nanoindentation experiments were conducted from ambient temperatures up to 800°C in situ in a scannine electron microscope, with temperature increments of 100°C.
In the coarse grained condition alloy softening was experimentally confirmed for the Re containing alloys, stemming from a reduced Peierl’s potential that was experimentally confirmed . The thermal stability of the ultra-fine grained microstructure could be increased through Re-alloying, which was evidenced from the nanoindentation experiments as well as additional static heat treatment experiments paired with EBSD measurements.
||Planned: Supplemental Proceedings volume