Behaviors of three BCC metal over a wide range of strain rates and temperatures: experiments and modeling

Citation
As. Khan et Rq. Liang, Behaviors of three BCC metal over a wide range of strain rates and temperatures: experiments and modeling, INT J PLAST, 15(10), 1999, pp. 1089-1109
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF PLASTICITY
ISSN journal
0749-6419 → ACNP
Volume
15
Issue
10
Year of publication
1999
Pages
1089 - 1109
Database
ISI
SICI code
0749-6419(1999)15:10<1089:BOTBMO>2.0.ZU;2-#
Abstract
The elastic-plastic behaviors of three body-centered cubic metals, tantalum , tantalum alloy with 2.5% tungsten, and AerMet 100 steel, are presented ov er a wide range of strains (15%), strain rates (10(-6)-10(4) s(-1)) and tem peratures (77-600 degrees F). Johnson-Cook and Zerilli-Armstrong models wer e found inadequate to describe the observations. A new viscoplastic model i s proposed based on these experimental results. The proposed constitutive m odel gives good correlations with these experimental results and strain-rat e jump experiments. In the next paper (Liang, R., Khan A.S., 2000. Behavior s of three BCC metals during non-proportional multiaxial loadings and predi ctions using a recently proposed model. International Journal of Plasticity , in press), multi-axial loading results on these materials and comparison with the proposed model will be presented. (C) 1999 Published by Elsevier S cience Ltd. All rights reserved.