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RESEARCH PAPERS: New Investigations Relating to Stress Concentrations Under Creep Conditions

Influence of Ductility on Creep Rupture Under Multiaxial Stresses

[+] Author and Article Information
W. Sawert

Large Jet Engine Department, General Electric Company, Cincinnati, Ohio

H. R. Voorhees

Department of Chemical and Metallurgical Engineering, The University of Michigan, Ann Arbor, Mich.

J. Basic Eng 84(2), 228-232 (Jun 01, 1962) (5 pages) doi:10.1115/1.3657289 History: Received August 31, 1961; Online November 04, 2011

Abstract

Creep-rupture times at 1200 and 1400 deg F were compared for notched versus unnotched bars and for thin-walled tubes in uniaxial tension versus combined tension and internal pressure to give a 1:1 ratio of longitudinal and transverse principal stresses. Relative response to multiaxial stresses of cast DCM alloy with low ductility was not essentially different from that of René 41 alloy with higher ductility. Creep rupture times of the tubular specimens under combined stresses correlated better in terms of the shear stress invariant than of maximum principal stress.

Copyright © 1962 by ASME
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