|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||General Poster Session
||O-14: Effect of Colony Size on Tensile Fracture Behavior in Lamellar and Bi-lamellar Microstructures of Ti-6Al-4V Alloys
||Jangho Yi, Yan Chong, Nobuhiro Tsuji
|On-Site Speaker (Planned)
In the present study, the effect of colony size on mechanical properties was systematically studied in a Ti-6Al-4V alloy with lamellar and bi-lamellar microstructures. The colony size of the lamellar microstructures was successfully refined from 234 Ám to 57 Ám by hot-compression in β phase region. The bi-lamellar microstructures were obtained through inter-critical annealing in α + β two-phase region of the obtained lamellar microstructures. In the lamellar microstructures, the ultimate tensile strength (UTS) increased with decreasing the colony size, while the total elongation was nearly constant. In the bi-lamellar microstructures, on the other hand, the total elongation significantly increased with decreasing the colony size, while the UTS was independent of the colony size. In order to understand the relationship between the colony size and the mechanical properties in the lamellar and bi-lamellar microstructures, their tensile fracture behaviors were compared.
||Planned: Supplemental Proceedings volume