|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Coupling Advanced Characterization and Modeling Tools for Understanding Fundamental Phase Transformation Mechanisms: An MPMD Symposium in Honor of Hamish Fraser
||Lattice Site Correspondence in Active Eutectoid Decomposition in Ti-Cu and Zr-Cu Alloys
||Harish Donthula, Raghvendra Tewari, Rajarshi Banerjee, Gautam Kumar Dey, Srikumar Banerjee
|On-Site Speaker (Planned)
Active eutectoid decompositions which are not suppressible on quenching are encountered in Ti and Zr based alloys. Results of experiments carried out on Ti-Cu and Zr-Cu eutectoid systems are summarized. While Ti<SUB>2</SUB>Cu and Zr<SUB>2</SUB>Cu (both Mo<SUB>2</SUB>Si structure) are derived from the parent β crystals by chemical ordering of copper in the bcc structure, the other constituent α phase evolves from β by maintaining Burgers correspondence. The question of extent of partitioning of the solute copper in the product phases has recently been resolved by 3D-Atom Probe Tomography. Lattice site correspondence between the eutectoid products is also established by HRTEM. Inspite of remarkable similarities between the transformation processes in the two systems, Zr-Cu and Ti-Cu, there are some subtle differences in the morphology and their fine lamellar structures. The presentation will highlight these aspects and provide an atomistic description of the transformation mechanism.
||Planned: Supplemental Proceedings volume