Work

Formation mechanism of typical microstructural characteristics and microstructure quantification of Ti-6.5Al-2Sn-4Zr-4Mo-1W-0.2Si alloy with initial lamellar structure during hot deformation

Year: 2025

Type: article

Abstract: The microstructure evolution of Ti-6.5Al-2Sn-4Zr-4Mo-1W-0.2Si alloy with initial lamellar structure during isothermal compression in α+ β phase field was investigated via scanning electron microscopy, transmission electron microscopy and electron backscatter diffraction techniques. Special attention was paid to the evolutionary mechanisms of typical microstructure features including necklace-like structure, kinking lamellar α with convex and concave morphology, sub-grain boundary parallel or perpendicular to the longitudinal lamellar axis, stable straight lamellar α with hard orientation generating under different deformation conditions. Furthermore, the distributions of recrystallized grain and crystallographic texture corresponding to different deformation parameters were analyzed quantitatively. The results showed that strain rate plays a more significant role in the dynamic globularization of lamellar α and grain coarsening of equiaxed α than deformation temperature, and it is beneficial for accelerating the progression of lamellar kinking and globularization to appropriately reduce the deformation temperature in the high-temperature region of α+ β phase field.

Source: Materials Today Communications

DOI: 10.1016/j.mtcomm.2025.114498

Authors: Xuemei Yang, Jiayuan Wang, Cheng Wang, Xuewei Yan, Xiaonan Shi, Yongquan Ning

Institutions: Zhengzhou University of Aeronautics, Northwestern Polytechnical University

Language: English

Topic: Metallurgy and Material Forming

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,830

Funders: Zhengzhou University, Natural Science Foundation of Henan Province, Key Scientific Research Project of Colleges and Universities in Henan Province