|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Deformation Induced Microstructural Modification
||Synchrotron X-Ray Probing Dynamic Structural Change of Materials under Shear Deformation by High-Speed Rotational Diamond Anvil Cell
||Tingkun Liu, Bharat Gwalani, Changyong Park, Stas Sinogeikin, Arun Devaraj
|On-Site Speaker (Planned)
A newly designed high-speed rotational diamond anvil cell (HS-RDAC) was utilized to reveal dynamic microstructural evolution of metallic alloys by in-situ synchrotron X-ray diffraction (XRD) under applied translational and rotational shear force, simulating the severe shear deformation during solid phase processing (SPP). Pure Al and Al4Si alloy sheets were chosen to initially investigate the strain heterogeneity induced by HS-RDAC at low RPM, which found significant heterogeneity of accumulated plastic strain. Also, CuNb powders were processed by the HS-RDAC at 100 RPM to explore the dynamic structural change in an immiscible alloy system. The results showed that the Nb started to dissolve into Cu at 100 RPM by analyzing the evolution of lattice spacing and peak width. The results from in-situ X-Ray studies were correlated with ex-situ multimodal characterizations and computational modeling to enable new scientific understanding of the highly dynamic far-from-equilibrium microstructural transformation pathways during shear deformation based SPP.