Effect of parent β-texture on α-texture evolution during dynamic precipitation in a continuous forging process of Ti-6Al-4V alloy

• Published in: Journal of alloys and compounds Vol. 947; p. 169425
• Main Authors: Meng, Lingjian, Kitashima, Tomonori, Zhao, Zhuoya, Wei, Qiu, Lin, Peng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.06.2023
• Subjects: Slip system; Texture control; Thermal mechanical processing; Titanium alloy; Titanium alloy; Texture control; Thermal mechanical processing; Slip system
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2023.169425

The α-texture evolution during dynamic precipitation in a continuous forging process was investigated in Ti-6Al-4 V alloy. The relationship between α-phase transformation texture and deformation texture was studied. It was found that the {10−10} transformation texture gradually weakened during deformation, and the texture intensity was lower than that of traditional β-forging and (α + β)-forging under a constant deformation strain. In addition, it was also observed that the (001) parent β-texture led to a weaker {10−10} α-texture development than the other β-textures. According to the Schmid factor (SF) analysis, the α-lath in the (001)//FD parent β-grains exhibited a higher SF value of the {10−10}< 11–20 > prismatic slip system than that in the other β-grains. The high-dislocation-density region locally appeared in the α-lath under the activation of prismatic slip system, which led to inhomogeneous deformation and partial lattice rotation. Therefore, the misorientation angle developed within the α-lath and the {10−10} transformation texture was weakened. •A new continuous forging process was used for weakening α-texture in titanium alloys.•The relationship between α transformation and α deformation texture during dynamic precipitation was clarified.•The (001) parent β-texture weakened α-texture by promoting α {10−10}<11–20>prismatic slip system activation.