|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Deformation Induced Microstructural Modification
||In-situ analysis of microscale deformation and fracture in severely deformed polycrystalline tungsten
||Lara Draelos, Zachary Levin, Ankit Srivastava
|On-Site Speaker (Planned)
At room temperature polycrystalline tungsten undergoes intergranular brittle fracture with no appreciable ductility. The brittle fracture of tungsten poses significant hurdles for many applications that would benefit from its other attractive properties such as, high density, high melting temperature and high strength. Recent works have shown that the morphology of grains and texture of polycrystalline tungsten can be tuned to significantly enhance its damage tolerance. Here we have carried out in-situ compression tests of polycrystalline tungsten processed via severe plastic deformation to yield lamellar grain morphology and strong texture. In addition, the effect of relatively low temperature post-process annealing is also considered. Our in-situ tests coupled with microscale digital image correlation allows us to capture both the macroscopic response and the distribution of microscopic deformation and strains. In this presentation we attempt correlate the material microstructure, microscale deformation and strain measurements with the observed macroscopic response of the material.