I. A. Veretennikova, D. I. Vichuzhanin, S. V. Smirnov

MECHANICAL PROPERTIES OF A COPPER–STEEL BIMETAL PRODUCED BY EXPLOSION WELDING IN THE TEMPERATURE RANGE BETWEEN −70 AND +70 °C

The paper studies the mechanical properties of an explosion-welded bimetal consisting of M1 copper and 09G2S steel layers in uniaxial tensile testing at temperatures ranging between −70 to +70 °C. Besides, similar characteristics of each individual metal in the same temperature range are compared with the characteristics of the bimetal. In the temperature range under study, the offset yield strength and ultimate tensile strength of the bimetal are lower than the similar characteristics of the 09G2S steel, but they significantly exceed the values for copper M1. The elongation of the bimetal is lower than that of the constituent metals, while the contraction ratio for all the specimens is approximately at the same level. It is found that, in the bimetal, explosion welding results in the appearance of a zone at the weld boundary that differs in the mechanical properties from the constituents and significantly affects the mechanical properties of the bimetal as a whole. The set of mechanical properties obtained in uniaxial tensile tests for the bimetal made of M1 copper and 09G2S steel shows the possibility of using this bimetal as a structural material at temperatures ranging between −70 and +70 °C.

Acknowledgment: The work was performed under the state assignment No. 124020700063-3 for the IES UB RAS. The equipment of the Plastometriya shared research facilities, IES UB RAS, was used for the research. We appreciate the assistance of Nikolai S. Michurov in the fractographic examination by means of a Tescan Vega II XMU scanning electron microscope.

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