Effect of welding temperature on microstructure and mechanical properties of TiAl/Ti2AlNb spark plasma diffusion welded joint

Ma, Mingqian; Chen, Chunhuan; Chai, Lei; Lv, Yanlong; Hou, Jinbao; Zhang, Boxian

doi:10.1007/s40194-021-01247-4

Cited by 7 publications

(1 citation statement)

References 26 publications

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“…However, conventional diffusion welding requires high welding temperature and long welding time due to intermetallics have a certain element diffusion hysteresis effect [14] . In recent years, spark plasma sintering (SPS) diffusion welding as an emergent connection technology has advantages of efficient forming joints and narrow high-temperature areas due to the use of pulsed high current heating and promoting element diffusion [15] . Therefore, SPS diffusion welding connection of TNM and Ti2AlNb alloy has a good application prospect.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and properties of TiAl/Ti2AlNb joint with TC1 intermediate layer obtained by spark plasma sintering diffusion welding

Fan,

Li,

Hou

2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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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.

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Section: Introductionmentioning

confidence: 99%