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
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.