|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||⍺ Phase Growth and Branching in Titanium Alloys
||Rongpei Shi, Deep Choudhuri, Ankush Kashiwar, Sriswaroop Dasari, Rajarshi Banerjee, Yunzhi Wang, Dipankar Banerjee
|On-Site Speaker (Planned)
The morphology and spatial distribution of alpha (α) precipitates have been mapped as a function of Mo content and heat treatmnent in Ti-Mo binary alloys employing a combinatorial approach. Three distinct regimes of α morphology and distribution were observed. These are colony-dominated microstructures originating from grain boundary α allotriomorphs, bundles of intragranular α laths, and homogeneously distributed individual fine-scale α laths. Branching of the α precipitates was observed in all these domains in a manner reminiscent of solid-state dendritic growth. 3-dimensional features of such branched structures have been analysed. Simulation of the branching process by phase field methods incorporating anisotropy in the alpha/beta interface energy and elasticity suggests that it can be initiated at growth ledges present at broad faces of the α laths, driven by the enhancement of the diffusion flux at these steps.
||Titanium, Phase Transformations,