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RESEARCH PAPERS

Yield Behavior of Polycrystalline Niobium

[+] Author and Article Information
D. C. Huffaker, G. M. Sinclair

Department of Theoretical and Applied Mechanics, University of Illinois, Urbana, Ill.

J. Basic Eng 86(4), 703-708 (Dec 01, 1964) (6 pages) doi:10.1115/1.3655927 History: Received August 08, 1963; Online November 03, 2011

Abstract

The yield behavior of niobium (columbium) has been studied under conditions of different states of stress, temperatures and strain rates, material compositions, and microstructures. Using data gathered in the present investigation as well as that obtained from ten other sources, it is shown that a relationship including the foregoing variables is given by

γ̇G=Ae−[ΔH*−V(τG−τiG)]/RT
While details of the frequency factor A remain unclear, it appears that it may be treated as a constant over a wide range of temperatures and strain rates. The analysis included in this paper shows that a simple parameter representation of yield behavior of niobium is feasible in terms of pertinent engineering variables.

Copyright © 1964 by ASME
Topics: Temperature , Stress
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