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RESEARCH PAPERS

High Temperature Inelastic Deformation Under Uniaxial Loading: Theory and Experiment

[+] Author and Article Information
K. S. Chan, U. S. Lindholm

Southwest Research Institute, San Antonio, TX 78284

S. R. Bodner

Technion, Haifa 3200, Haifa, Israel

K. P. Walker

Engineering Science Software, Inc., Smithfield, RI 02917

J. Eng. Mater. Technol 111(4), 345-353 (Oct 01, 1989) (9 pages) doi:10.1115/1.3226478 History: Received December 10, 1987; Revised February 06, 1989; Online September 15, 2009

Abstract

The elevated temperature, uniaxial inelastic deformation behavior of a Ni-base alloy, B1900 + Hf, has been investigated by performing isothermal tensile, creep, cyclic, stress relaxation, and thermomechanical fatigue tests. The range of strain rates examined are 10−7 to 10−2 s−1 , while the test temperatures range from 25°C to 1093°C. This extensive constitutive data base has been used for evaluating the unified constitutive models of Bodner-Partom and of Walker which apply for the small strain regime. Comparison of test results with independent model predictions indicates good agreement over a broad range of loading conditions demonstrating the applicability of the unified constitutive equation approach for describing the strongly nonlinear, time, and temperature-dependent response of metals under a wide range of deformation and thermal histories. Thus, the results give confidence that the unified approach is an effective and efficient approach in which complex, history-dependent, thermo-viscoplastic flow can be represented within a single inelastic strain-rate term.

Copyright © 1989 by ASME
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