High-temperature strength and microstructural evolution of Ti-6Al-4V alloy fabricated by wire Arc additive manufacturing under elevated temperature.

ABSTRACT: This study investigates the high-temperature mechanical properties and compressive deformation behavior of Ti-6Al-4V fabricated by Wire Arc Additive Manufactured (WAAM), in comparison with its hot-rolled counterpart. The WAAM alloy exhibited a fine α-lath Widmanstätten structure containing a nano-film β phase, which developed through solid-state β→α transformation during cooling under a steep thermal gradient induced by rapid solidification and interpass thermal cycling. In contrast, the wrought alloy showed a bimodal microstructure with coarse equiaxed α and α + β lamellar colonies. Compression tests at RT, 300 °C, 500 °C, and 700 °C revealed that WAAM alloy retained higher yield strengths across all temperatures (RT: 1034.1 MPa, 300 °C: 845.7 MPa, 500 °C: 646.2 MPa, 700 °C: 320.4 MPa). T

SUBMITTER: Kim S 

PROVIDER: S-EPMC12808762 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature