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RESEARCH PAPERS

A Phenomenologically Based Constitutive Model for René 95

[+] Author and Article Information
J. A. Sherwood

Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824

D. C. Stouffer

Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, OH 45221

J. Eng. Mater. Technol 114(4), 340-347 (Oct 01, 1992) (8 pages) doi:10.1115/1.2904183 History: Received January 29, 1991; Revised January 14, 1992; Online April 29, 2008

Abstract

A unified constitutive model incorporating internal state variables based upon the deformation phenomena that are observed to occur at the microstructural level has been developed and applied to René 95. Material hardening is modeled using dragstress and back-stress state variables, while the reduction in the material’s load-carrying capability is described by using a damage-accumulation state variable. Application of the model to the tensile, cyclic, and creep loadings of René 95 at 650°C demonstrated that the model is capable of capturing cyclic hardening, damage accumulation, and tertiary creep by using one inelastic flow equation in concert with the state-variable-evolution equations.

Copyright © 1992 by The American Society of Mechanical Engineers
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