Asynchronous Spheroidization of the Lamellar Structure in a Near-α Ti Alloy

• Published in: Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2025, Vol.56 (1), p.1-6
• Main Authors: Xu, Shuai, Gao, Chenxin, Zhang, Haiming, Xiao, Namin, Cui, Zhenshan
• Format: Article
• Language: English
• Subjects: Brief Communication; Characterization and Evaluation of Materials; Chemistry and Materials Science; Crystal defects; Deformation effects; Dynamic recrystallization; Grain boundaries; Grain refinement; Grain structure; Lamellar structure; Materials Science; Mechanical properties; Metallic Materials; Nanotechnology; Phase transitions; Secondary recrystallization; Spheroidizing; Structural Materials; Surfaces and Interfaces; Thin Films; Titanium base alloys
• ISSN: 1073-5623; 1543-1940
• DOI: 10.1007/s11661-024-07627-x

This communication reports a commendable grain refinement in a near- α Ti alloy through the asynchronous spheroidization of the lamellar structure. Heterogeneous microstructural defects, caused by the β → α phase transformation, lead to the preferential geometric dynamic recrystallization in the thin secondary α grains. As deformation progresses, the resulting mixed-grain structure effectively facilitates the deformation and subsequent discontinuous dynamic recrystallization of the coarse grain boundary α grains. These findings highlight the potential for optimizing grain refinement processes in near- α Ti alloys, offering insights for enhancing their mechanical performance in demanding applications.