Effect of High Temperature Deformation on Microstructure and Crystallographic Orientation of a New High Strength-toughness Titanium Alloy

TAO Chang'an; ZHU Liwei; WANG Xinnan; SHANG Guoqiang; LI Mingbing; ZHU Zhishou

doi:10.3969/j.issn.1674-6457.2026.08.010

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (8) : 109-117. DOI: 10.3969/j.issn.1674-6457.2026.08.010

Light Alloy Forming

Effect of High Temperature Deformation on Microstructure and Crystallographic Orientation of a New High Strength-toughness Titanium Alloy

TAO Chang'an, ZHU Liwei^*, WANG Xinnan, SHANG Guoqiang, LI Mingbing, ZHU Zhishou

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Abstract

The work aims to investigate the effect of high temperature deformation parameters on microstructure morphology and crystallographic orientation, and master the characteristics of hot deformation and the regularity of crystallographic orientation evolution of a new high strength-toughness Ti-Al-Mo-Cr-V-Zr titanium alloy. By thermal simulation compression and corresponding characterization experiments, the high temperature rheological characteristic were studied. The evolution laws during thermal compression deformation were discussed by research for microstructure morphology and crystallographic orientation with SEM, EBSD characterization methods. The results indicated that the rheological stress increased with the decreasing temperature and the increasing strain rate. At the initial stage of thermal deformation, the rheological stress rapidly rose to the peak value and then gradually decreased, entering the steady-state flow stage. The high-temperature deformation conditions had a remarkable influence on the microstructure morphology and crystallographic orientation. The strain rate affected the deformation temperature rise and the uniformity of deformation. Under a high strain rate, the deformation temperature rise was severe and the non-uniformity of deformation intensified, leading to a reduction in the content of the primary α phase and an increase in its elongation. In conclusion, the deformation temperature mainly affects the content of the primary α phase. Meanwhile, at higher temperatures, the deformation of the α phase is more facile and the elongation feature is more pronounced. Additionally, at lower temperatures, the orientation dispersion of the α phase and β phase is greater and the anisotropy is weaker; at higher temperatures, the orientation concentration of the α phase and β phase is larger and the anisotropy is more severe.

Key words

high strength-toughness titanium alloy / high temperature deformation / rheological characteristics / microstructure evolution / crystallographic orientation

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TAO Chang'an, ZHU Liwei, WANG Xinnan, SHANG Guoqiang, LI Mingbing, ZHU Zhishou. Effect of High Temperature Deformation on Microstructure and Crystallographic Orientation of a New High Strength-toughness Titanium Alloy[J]. Journal of Netshape Forming Engineering. 2026, 18(8): 109-117 https://doi.org/10.3969/j.issn.1674-6457.2026.08.010

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Funding

Innovation Platform Project of Taihang National Laboratory of China(CXPT-2023-025); Innovation Foundation of Key Laboratory of the Advanced Titanium Alloys AECC(JK65241512)