, Volume 109, Issue 3, pp 278-285
Date: 15 Apr 2010

Deformation and fracture of single crystals of VKNA-type alloys at 1100–1250°C

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Abstract

A comparative study of the structure and mechanical properties of single-crystal samples 〈001〉 of VKNA-1V and VKNA-4U alloys (cast and after heat treatment) has been performed using tensile tests in a temperature range of 1100–1250°C. In the case of the VKNA-4U alloy, samples of different crystallographic orientations have also been tested. At 1100°C, recrystallization was observed near the zone of fracture. The basic mechanism of relaxation at 1200–1250°C was found to be dynamic recovery. At 1250°C, the strength properties of the VKNA-4U alloy are higher than those of the VKNA-1V alloy.

Original Russian Text © D.P. Rodionov, D.I. Davydov, N.N. Stepanova, V.G. Pushin, Yu.I. Filippov, N.I. Vinogradov, Yu.N. Akshentsev, V.A. Sazonova, 2010, published in Fizika Metallov i Metallovedenie, 2010, Vol. 109, No. 3, pp. 302–309.