Microstructure and mechanical properties of copper-tantalum joints produced by explosive welding

Author

Mali, V.I. ; Bataev, A.A. ; Bataev, I.A. ; Malyutina, Yuliya N. ; Esikov, Maxim A. ; Lozhkin, Vasily S.

Author_Institution

Lab. of high energy density Phys., Lavrentyev Inst. of Hydrodynamics, Novosibirsk, Russia

Volume

1

fYear

2013

fDate

June 28 2013-July 1 2013

Firstpage

9

Lastpage

12

Abstract

Microstructure and mechanical properties of copper and tantalum joints produced by explosive welding technology were characterized. It was established by structural analysis technique that mixing of copper and tantalum at the interface occurs due to a nonequilibrium process. The mixing zone consists of tantalum globular particles which sizes vary from 8 to 40 nm. In the close vicinity to the interface copper grains contains a lot of microtwins bundles. Their formation plays a crucial role both in the microstructure evolution and fragmentation process of copper grains. Microhardness of copper-tantalum mixing zone is 2800 MPa which is 2 times higher than that of initial materials. The tensile test has shown the significant growth of composite yield strength in comparison with that of initial materials.

Keywords

copper alloys; microhardness; mixtures; tantalum alloys; tensile testing; welding; yield strength; copper grain fragmentation process; copper grain microstructure evolution; copper-tantalum joints; copper-tantalum mixing zone; explosive welding; microhardness; structural analysis technique; tantalum globular particles; tensile test; yield strength; Copper; Heating; Ions; Welding; copper; explosive welding; mixing zone; tantalum;

fLanguage

English

Publisher

ieee

Conference_Titel

Strategic Technology (IFOST), 2013 8th International Forum on

Conference_Location

Ulaanbaatar

Print_ISBN

978-1-4799-0931-5

Type

conf

DOI

10.1109/IFOST.2013.6616956

Filename

6616956