|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||The Effect of Deformation-induced Adiabatic Heating on Microstructure Evolution of Ti-6Al-4V Alloy during Open-die Screw Press Forging
||Mykola Kulakov, Tatyana Konkova, Giribaskar Sivaswamy, Salaheddin Rahimi
|On-Site Speaker (Planned)
Microstructure evolution of Ti-6Al-4V alloy during hot forging on a 2100t screw press was investigated. A double truncated cone (DTC) (95mm height and 113mm maximum diameter) was forged at 970°C (~30°C below β transus) to a height reduction of 60% using the full press capacity followed by air cooling. A finite element model of the forging process was also developed. The model accurately predicted the forging force. A wide range of strains (0.3 to 2.5) was generated in the mid-height plane of the DTC. Adiabatic heating due to the high rate of deformation of up to 47s<SUP>-1</SUP> caused a temperature rise by as much as 60°C (maximum temperature ~30°C above β transus). The primary α phase was uniformly distributed in the transformed β phase matrix. Local disorientation due to deformation was observed within primary α grains. The deformation-induced adiabatic heating did not cause significant amount of the α-β phase transformation.
||Planned: Supplemental Proceedings volume