Paper
25 October 2023 Microstructure and properties of TiAl/Ti2AlNb joint with TC1 intermediate layer obtained by spark plasma sintering diffusion welding
Jiafeng Fan, Xiaoqiang Li, Jinbao Hou
Author Affiliations +
Proceedings Volume 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023); 128011U (2023) https://doi.org/10.1117/12.3007008
Event: Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 2023, Dalian, China
Abstract
Joining of high Nb content TiAl (TNM) and Ti2AlNb alloy is a research hotspot in aircraft engines. In the work, the TC1 thin was designed as the intermediate layer for joining TNM with Ti2AlNb alloy and the firm joint of TNM/TC1/Ti2AlNb was obtained by spark plasma diffusion welding. The joint was composed of TNM/TNM impacted zone/TC1 with TNM diffusion reaction zone/TC1 with Ti2AlNb diffusion reaction zone/Ti2AlNb impacted zone/ Ti2AlNb. The TNM impacted zone consists of γ phase matrix and equiaxed α2 phase and Ti2AlNb impacted zone consists of needle-shaped β phase and α matrix phase. The TC1 diffusion reaction zone was composed of α matrix phase and some large equiaxed β phase and the Nb element from Ti2AlNb is the main reason for the formation of large equiaxed β-phase in this zone. The high temperature tensile strength of the joint at 700 ℃ reached 377 MPa, with the main fracture location at TC1 with TNM diffusion reaction zone.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Jiafeng Fan, Xiaoqiang Li, and Jinbao Hou "Microstructure and properties of TiAl/Ti2AlNb joint with TC1 intermediate layer obtained by spark plasma sintering diffusion welding", Proc. SPIE 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 128011U (25 October 2023); https://doi.org/10.1117/12.3007008
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KEYWORDS
Diffusion

Niobium

Interfaces

Titanium

Materials properties

Sintering

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