|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Structural Rejuvenation in Bulk Metallic Glasses with Varying Fictive Temperature
||Hui Wang, Wojciech Dmowski, Jittisa Ketkaew, Jan Schroers, Zengquan Wang, Takeshi Egami
|On-Site Speaker (Planned)
The thermal history of the BMGs was found to be important factor that influences the plasticity of the BMGs. The fictive temperature, Tf, was proposed to characterize the disordered structure of the BMGs inherited from liquids. The dependence of mechanical properties on Tf were reported. For instance, Ketkaew et al. (unpublished) measured the fracture toughness of Zr44Ti11Cu10Ni10Be25 BMGs with different Tf. In this work, the structures of Zr44Ti11Cu10Ni10Be25 BMGs with different Tf were studied through high-energy x-ray diffraction under deformation in the elastic regime. From PDF analysis, we observed that the structure tends to be more disordered with the increasing Tf. Furthermore, we examined the local non-affine deformation and found that the density of the local topological rearrangements (LTRs) increases with Tf, which correlates with plasticity. This result of the microscopic structure well explained the trend of its macroscopic fracture toughness. Work supported by the U.S. DOE, DE-AC05-00OR-22725.
||Planned: Supplemental Proceedings volume