Abstract
Abstract The effect of friction surface strengthening on the microstructure of the copper-beryllium alloy BrBNT1.7 is considered using x-ray diffraction and electron microscopic analysis. It is shown that the aging of the quenched alloy is accompanied by intermittent decomposition with a predominant precipitation of the intermetallic χ-phase of the Be12Ti type. The subsequent intense surface plastic deformation via sliding friction heavily refines the matrix solution to the size of a nanometer. Partial deformation dissolution of the second-phase particles occurs. Aging and subsequent friction treatment contribute to an effective increase in strength properties (yield strength and microhardness).
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