|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Thermo-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||In-situ Imaging and Diffraction Studies of Shear Band Nucleation and Propagation in Metallic Glass and Composites
||Jia Chuan Khong, Jiawei Mi
|On-Site Speaker (Planned)
In this work, we studied in situ the nucleation and propagation of shear bands under tension in a ZrTi bulk metallic glass and a composite. A micrometre-size semi-circular or circular stress concentrator was introduced onto the miniature dog-bone shaped samples to facilitate the initiation of shear bands. This arrangement allows the nucleation and propagation of shear bands under tensile loads to be controlled in a quasi-static manner, and then studied in situ systematically using electron imaging. To measure the local stresses/strains in front of the shear bands at different loads, samples were tested under the identical conditions at a synchrotron X-ray beamline. Diffraction patterns were acquired at the locations/paths where shear bands were observed, and the local stresses/strains field were calculated based on the acquired diffraction patterns. The imaging and diffraction studies provide complimentary information on how shear band propagation is controlled by the local stress field ahead.
||Planned: Supplemental Proceedings volume