Joining dental biomaterials of Ti-6Al-4V alloy and cp-Ti using transient liquid phase bonding: Metallurgical and mechanical assessment. (August 2022)

• Record Type: Journal Article
• Authors: Vazirian, S.; Farzadi, A.; Solouk, A.
• Is Part Of: Materials today communications. Volume 32(2022)
• Publication Date: 2022-08
• Subjects: Diffusion brazing -- Commercially pure titanium -- Bonding time -- Intermetallic compound -- Mechanical behavior -- Titanium grade 2; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2022.103981
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: The choice of manufacturing process plays a vital role in producing a medical device with a few problems; one of the best manufacturing processes for achieving superior physical and mechanical properties is transient liquid phase (TLP) bonding. The effect of bonding time in the range of 5–45 min on the microstructural and mechanical characterizations of the joint by an ultra-thin Cu interlayer with a thickness of 10 µm was investigated. The results revealed that the dominant phase is Ti2 Cu intermetallic compound (IMCs) in the joint zone in all samples. It was shown that intensive metallurgical reactions happened at the interface of cp-Ti/Cu/Ti-6Al-4V, and the joint zone involves Ti2 Cu IMCs. By increasing the holding time, Ti2 Cu is decomposed, and finally, the joint consists of tiny Ti2 Cu in α-Ti matrix. Shear tests indicated that the homogenized joint bonded at a prolonged time exhibits better mechanical properties than those at a prolonged low time. The minimum and maximum shear strength were achieved in the quantity of 175 and 384 MPa at 5 and 45 min, respectively. The hardest zone in the samples of 5 and 45 min was the reaction zone and the diffusion-affected zone (DAZ) of Ti-6Al-4V, respectively. By the increase in the holding time, the failure mode changed from cleavage to semi-cleavage, and the fracture path was altered from the reaction zone to the DAZ of Ti-6Al-4V zone, originating from the reduction of IMCs in the joint center. Graphical Abstract: ga1