Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Ti2AlNb/Ti/TC4 Joint

Crystals

Guangjie Feng¹  Dean Deng¹  Yifeng Wang¹  Bingxu Hu¹  Yan Wei¹ 

[1] College of Materials Science and Engineering, Chongqing University, No. 174, Shazhengjie, Chongqing 400044, China;

关键词: Ti₂AlNb alloy;    TC4 alloy;    diffusion bonding;   

DOI  :  10.3390/cryst11070770

来源: DOAJ

【 摘 要 】

In this paper, the Ti₂AlNb alloy was bonded to TC4 alloy using the vacuum diffusion bonding method with a Ti interlayer. The interfacial microstructure of the Ti₂AlNb/Ti/TC4 joint was characterized. The relationship between the bonding parameters and the microstructure and mechanical property of the joints was explored. Results indicated that the interdiffusion of Nb and Al elements between the interlayer and substrates promoted the formation of the lamellar α + β dual-phase structure in the joint. The bonding parameters determined the diffusion distance of Nb and Al elements, thus controlling the characteristics of the lamellar α + β dual-phase structure. When the Ti₂AlNb alloy and TC4 alloy were bonded at 950 °C for 30 min under a pressure of 10 MPa, the elemental diffusion in the bonding couple was sufficient and the joint possessed the maximum shear strength of 549 MPa.

【 授权许可】

Unknown