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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2020
Presentation Title Thermally Activated Deformation Processes in W-Re Alloys
Author(s) Verena Maier-Kiener, Johann Kappacher, Daniel Kiener, Helmut Clemens
On-Site Speaker (Planned) Verena Maier-Kiener
Abstract Scope 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 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 800C in situ in a scannine electron microscope, with temperature increments of 100C. 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.
Proceedings Inclusion? Planned: Supplemental Proceedings volume
Keywords Biomaterials,


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Static and Dynamic Grain Growth in Niobium at 1200 to 1500℃
The Influence of Dislocation Density on Thermal Conductivity in Pure Niobium from 2-9K
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