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

Rahmat Saptono, Choong Un Kim

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

This paper presents further development of the constitutive equations based on model-inspired phenomenological approach. In our previous approach, three figures of merit functions were examined to study the temperature-dependence of yield stress and found two model equations that may work especially well for the small volume materials in the moderate temperature ranges (2<TM/T>5). We have investigated the underlying assumptions behind each model to substantiate their physical correctness. We examined the parameters in each models using the frame of flow stress being dislocation-mediated, thermally activated, and obstacle-controlled process. These examinations led us to find refined model equations with parameters that can be related to the characteristics of flow mechanisms.

Original languageEnglish
Article number012021
JournalIOP Conference Series: Materials Science and Engineering
Volume58
Issue number1
DOIs
Publication statusPublished - 1 Jan 2014
Event2014 International Conference on Manufacturing, Optimization, Industrial and Material Engineering, MOIME 2014 - Jakarta, Indonesia
Duration: 29 Mar 201430 Mar 2014

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