“Creep of Powder Metallurgical Chromium”

Abstract

In contrary to molybdenum, tungsten or tantalum and niobium, chromium has not yet achieved wide application as a refractory metal. Melting at 1920° C chromium is the lowest melting metal out of the VI A group of elements. Its cubic body centered crystalline structure and its behaviour against interstitial elements makes it a brittle material near room temperature.

This investigation deals with the analysis of powder metallurgical 3N7 chromium examined under tensile conditions applying high temperature testing and performing short time creep testing under constant load. Phenomena of high temperature tensile testing according to standardized conditions will be compared to the creep results. Evaluation of tests performed supplies mechanical data and creep data for chromium up to 1100° C in comparison to data from literature. These data and fracture modes relevant to high temperature testing will be discussed and compared to existing deformation maps.