On the Modeling of Nonproportional Cyclic Plasticity of Waspaloy

[+] Author and Article Information
A. Abdul-Latif, M. Clavel, V. Ferney, K. Saanouni

LG2mS-mécanique, URA 1505 du CNRS, Université de Technologie de Compiègne, B.P. 649, 60206 Compiègne, Cedex, France

J. Eng. Mater. Technol 116(1), 35-44 (Jan 01, 1994) (10 pages) doi:10.1115/1.2904253 History: Received July 15, 1992; Revised April 23, 1993; Online April 29, 2008


The isotropic hardening is known to play an effective role in the overhardening of materials under nonproportional cyclic loading. However, the behavior of the two states of Waspaloy (namely overaged and underaged states) under these loading conditions, shows that the kinematic hardening has also a considerable role in the overhardening. Experimental tests were carried out on these two states under various proportional and nonproportional cyclic loading conditions at room temperature. The effect of loading paths on micro-mechanisms of deformation was studied. From a microstructural point of view, it was shown that the deformation modes (quantitatively and qualitatively) depend on the loading path and the heat treatment. A constitutive model is proposed to describe the effect of overhardening, under the nonproportional loading conditions, on the kinematic hardening. The predicted responses are in good agreement with experimental results.

Copyright © 1994 by The American Society of Mechanical Engineers
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