High Temperature Mechanical Properties and Fracture Characteristics of Pure Vanadium

Abstract:

Pure vanadium samples were prepared by hot isostatic pressing (HIP) technology. High temperature mechanical properties of the as-prepared samples in the range of 700-1100 oC were tested by means of high temperature tensile testing. The fracture surfaces and microstructures were analyzed using scanning electron microscope (SEM) and optical microscope (OM). The results show that the tensile strength, elongation and reduction in area are temperature-dependent and show approximately linear decrease with increasing the temperature. Vanadium possesses good tensile strength and ductility as the tensile temperature is 700-800 oC, and shows a feature of ductile fracture. However, a mixed ductile-brittle fracture surface is observed at the testing temperature 900-1100 oC and the cleavage face is increased with the tensile temperature rising.