Microstructural analysis of titanium alloys based on high-temperature phase reconstruction

• DOI: 10.1007/s10853-024-09963-0
• Publication Date: 2024-07-08T14:02:21Z
• Authors: Oleksandr Lypchan...; Krzysztof Muszka; Bradley Wynne; Jakub Kawalko; Tomasz Śleboda
• Keywords: Titanium alloy

Abstract The microstructural evolution of titanium alloys under high-temperature conditions plays a key role in determining their mechanical properties and hot working behavior. This research presents an advanced method for calibrating β phase reconstruction software using situ testing on Grade 2 titanium, which achieves accurate the parent microstructure. In addition, unique observations forging Ti-6246 alloy are highlighted, demonstrating influence deformation parameters resulting grain structures. Using techniques such as electron backscatter diffraction Burgers orientation relationship-based software, elucidates behavior these phases varying thermal conditions. significant growth transformation dynamics were observed upon heating beyond β-transus temperature during calibration software. analysis demonstrates effectiveness precise reconstructing microstructure based inherited α s phase. Furthermore, evaluation forming shows strain rate Finite element coupled with dynamic material modeling distribution temperature, rate, effective forging, aids qualitative assessment workability. Microstructural highlight presence elongated colonies precipitates, indicative localized intensities temperatures. EBSD reveals distinct features different regions forging. particular, subjected to higher rates exhibit grains pronounced disorientation gradients, suggesting intense deformation. Conversely, optimal lead appearance unreinforced axisymmetric grains, indicating recovery processes. Pole figure further emphasizes crystallographic relationship between phases, confirming that occurs exclusively within These results provide valuable insights into conditions, essential optimizing processes improving properties. Graphical abstract