A model-inspired phenomenology constitutive equation for the temperature-dependence of flow stress at confined dimension I

Rahmat Saptono, Choong Un Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

A model-inspired phenomenology constitutive equation was developed from the first principles to study the temperature dependence of flow stress at confined dimension. The model was limited in the range of temperature and strain-rate where diffusion is insignificant. It was assumed that flow stress was predominantly governed by the thermal activation of dislocation lines overcoming short-range barriers. A simple sound model was developed from the established principles. Data from relevant experiments were fitted into the model to evaluate and reveal key parameters. Normalization of the data and linearization of the model were performed prior to the evaluation and analysis. The proposed models were generally well fitted to the experimental data as indicated by the correlation factors of >0.85, which could be principally accepted by the criteria of R2=0.90. Of the candidate models, Model III and Model I are particularly recommended to study the temperature-dependent behavior of Cu at confined dimension in the space of interest related to the intended applications (2<TM/T<5). Physical mechanistic re-interpretation of the models for the problem of interest is presented in the second report (Part II).

Original languageEnglish
Title of host publicationAdvances in Kinematics, Mechanics of Rigid Bodies, and Materials Sciences
PublisherTrans Tech Publications Ltd
Pages83-92
Number of pages10
ISBN (Print)9783038350385
DOIs
Publication statusPublished - 1 Jan 2014
Event2013 International Conference on Kinematics, Mechanics of Rigid Bodies, and Materials, KINEMATICS 2013 - Jakarta, Indonesia
Duration: 2 Nov 20133 Nov 2013

Publication series

NameApplied Mechanics and Materials
Volume534
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Conference

Conference2013 International Conference on Kinematics, Mechanics of Rigid Bodies, and Materials, KINEMATICS 2013
CountryIndonesia
CityJakarta
Period2/11/133/11/13

Keywords

  • Model
  • Stress
  • Temperature-dependence

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