High-Temperature Deformation Behavior and Microstructural Evolution of Additively Manufactured Ti-۶Al-۲Sn-۴Zr-۲Mo Alloy

This study examines the high-temperature compressive behavior and microstructural evolution of Ti-۶Al-۲Sn-۴Zr-۲Mo alloy fabricated by electron beam powder bed fusion. Compression tests conducted between ۶۰۰-۱۰۰۰ °C reveal a steady decline in yield strength and work-hardening capacity with increasing temperature, driven by the transition from dislocation-controlled plasticity to recovery- and diffusion-dominated deformation. Microscopic observations show progressive coarsening of the a+ẞ lamellar structure and partial dynamic recrystallization at elevated temperatures. The integrated mechanical and microstructural results establish a clear temperature-structure-property relationship, highlighting the dominant role of a/ẞ morphology and thermally activated dislocation kinetics in governing the alloy's high-temperature flow response.

کلیدواژه ها:

Additive Manufacturing ، Electron Beam Melting ، Thermomechanical processing ، Titanium alloys