Effect of annealing treatment on microstructure and tensile properties of Ti-48Al-2Cr-5Nb alloy fabricated by laser additive manufacturing

Liu, Zhanqi; Zhu, Xiaoou; Zhang, Yan

doi:10.1016/j.optlastec.2022.108412

Cited by 7 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The composition of the phase in the alloy does not change after annealing. Compared with the other three groups of diffraction peaks, the γ (111) diffraction peak of the sample annealed at 1260 °C/30 min/FC is the highest when 2θ is equal to 39° [20]. This indicates that under this annealed condition, the alloy contains a greater percentage of γ (111) crystal plane in the crystalline area.…”

Section: The Phase Compositionmentioning

confidence: 85%

Enhancement of Microstructure and Mechanical Properties of High Nb-TiAl Alloys Prepared Using Laser Additive Manufacturing by Annealing Treatment

Liang,

Liu,

Wang

et al. 2023

Metals

Self Cite

View full text Add to dashboard Cite

The microstructure, phase composition, hardness, and tensile properties of the Ti-48Al-2Cr-5Nb alloy have been systematically investigated using laser additive manufacturing technology. Results indicate that both the as-deposited and annealed microstructures contain both the α2 (Ti3Al) and γ (TiAl) phases. As the annealing temperature increased, the structure changed significantly from a large block structure to a fine equiaxed structure and finally to a large lamellar structure. Nevertheless, the amount and distribution of precipitation of α2 phase are obviously different, especially during the annealing at 1260 °C, where the fine α2 phases are evenly distributed on the γ phase matrix. The hardness value of the as-deposited sample is the highest, with a HV value of 484 at the room temperature, while the hardness value of the annealed sample at 1260 °C is the smallest, with a HV value of 344. An annealed sample at 1260 °C exhibits the highest tensile strength and elongation at room temperature, with values of 598 MPa and 2.1%, respectively. These values are increased by 1.15 times and 1.4 times compared to the as-deposited sample (519 MPa, 1.5%).

show abstract

Section: The Phase Compositionmentioning

confidence: 85%