N. Yu. Frolova, V. I. Zeldovich, I. V. Khomskaya, A. E. Kheifets, E. V. Shorokhov

INFLUENCE OF AGING AND STRAIN ON THE STRUCTURE AND MECHANICAL PROPERTIES OF CHROMIUM-ZIRCONIUM BRONZE

The influence of aging and deformation by dynamic channel-angular pressing (DCAP) on the change of the structure and mechanical properties of Cu-0.14%Cr-0.04%Zr low-alloy chromium-zirconium bronze has been studied. It is shown that, under DCAP and subsequent aging, the studied bronze suffers the decomposition of the alpha-solid solution accompanied by the precipitation of nanosized particles of chromium and the copper-zirconium phase. This hardens the bronze and increases its thermal stability. A substantial increase in the mechanical properties of the bronze after DCAP and subsequent aging has been found. Thus, ultimate strength is increased 2.8 times and yield stress is increased 5.1 times as compared with the initial hardened condition, satisfactory plasticity being maintained.

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