Transient liquid phase (TLP) bonding of Ti2AlNb alloy using Ti/Ni interlayer: Microstructure characterization and mechanical properties

Autor: Zhenwen Yang, X.Q. Cai, Defa Wang, Yuande Liu, Y. Wang
Rok vydání: 2016
Předmět:
Zdroj: Journal of Alloys and Compounds. 679:9-17
ISSN: 0925-8388
Popis: A reliable Ti 2 AlNb alloy joint was successfully obtained by transient liquid phase (TLP) bonding technique using Ti/Ni interlayer. The effects of bonding temperature and time on the interfacial microstructure and mechanical properties of the TLP bonded Ti 2 AlNb joints were investigated. The results showed that the joint was primarily comprised of two characteristic zones, and the reaction phases formed in the bonded joint were Nb 3 Al, B2, τ 3 and Ti 2 Ni. The maximum shear strength at room temperature reached 428 MPa when the joint was bonded at 1180 °C for 20 min, while it was 423 MPa, 407 MPa and 338 MPa at 500 °C, 650 °C and 800 °C, respectively. Elastic modulus ( E ) and hardness ( H ) of the reaction phases were determined by nano indentations. The formation of τ 3 phase was extremely hard and brittle, which provided a preferential path for crack initiation and propagation.
Databáze: OpenAIRE