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Modeling of the Mechanical Behavior of a Nickel Alloy by Using a Time-Dependent Thermodynamic Approach to Relaxations of Continuous Media

Modeling of the Mechanical Behavior of a Nickel Alloy by Using a Time-Dependent Thermodynamic... In this paper, we show the capabilities of a thermodynamicapproach to the relaxation of continuous media to describe the behaviorof the Nickel-based alloy IN738LC submitted to various mechanicalloadings at high temperature (850°C). A preliminarysimple modeling (with one spectrum of relaxation times) does not providesatisfactory results. Microscopic observations of the alloy (Sievert etal., 1997) show the existence of several viscosity domains and we takeone of them into account in our modeling of two spectra of relaxationtimes. The results are much better. Finally, we compare our simulationsto those obtained with the classical elastoviscoplastic modeling ofChaboche and we link these two approaches at the conceptual level. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mechanics of Time-Dependent Materials Springer Journals

Modeling of the Mechanical Behavior of a Nickel Alloy by Using a Time-Dependent Thermodynamic Approach to Relaxations of Continuous Media

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References (16)

Publisher
Springer Journals
Copyright
Copyright © 2001 by Kluwer Academic Publishers
Subject
Physics; Polymer Sciences; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation Materials; Mechanics
ISSN
1385-2000
eISSN
1573-2738
DOI
10.1023/A:1009895307457
Publisher site
See Article on Publisher Site

Abstract

In this paper, we show the capabilities of a thermodynamicapproach to the relaxation of continuous media to describe the behaviorof the Nickel-based alloy IN738LC submitted to various mechanicalloadings at high temperature (850°C). A preliminarysimple modeling (with one spectrum of relaxation times) does not providesatisfactory results. Microscopic observations of the alloy (Sievert etal., 1997) show the existence of several viscosity domains and we takeone of them into account in our modeling of two spectra of relaxationtimes. The results are much better. Finally, we compare our simulationsto those obtained with the classical elastoviscoplastic modeling ofChaboche and we link these two approaches at the conceptual level.

Journal

Mechanics of Time-Dependent Materials – Springer Journals

Published: Mar 1, 2001

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