Texture and room temperature mechanical properties of dispersion strengthened Ni−Cr alloys

Abstract

The effects of preferred crystallographic orientation on the elastic and plastic properties of dispersion-strengthened Ni-Cr alloys have been observed at room temperature. One alloy possessed a heavy cube-texture with a twin component while another alloy did not show evidence of a preferred crystallographic orientation. The elastic modulus was found to vary within the plane of the sheet of the textured alloy, depending on the direction of the axis of the tensile specimen, from 22.9×106 psi (1.58×1012 d per sq cm) to 33.1×106 psi (2.28×1012) d per sq cm). The ultimate strength varied between 108×103 psi (7.45×109 d per sq cm) and 127×103 psi (8.75×109 d per sq cm) again depending upon the orientation of the tensile axis. These variations are related to theories of plastic and elastic behavior in materials. It is concluded that the presence of the preferred orientation acts to texture strengthen the alloy at room temperature. The tensile properties of the two alloys at 2000°F (1093°C) indicate that texture is possibly partially responsible for the excellent high temperature strengths and creep resistance of the dispersion strengthened alloys.