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Title: Comparison between the rate and temperature dependent plasticity models of Bammann and of Kocks and Mecking

Abstract

The strain-rate and temperature dependent plasticity model of Bammann, as implemented in the PRONTO FEM code, is compared with the model of Kocks and Mecking. It is shown that simplified versions of both models can be directly compared. Both models separate the temperature and strain-rate dependent yield stress (in a well annealed condition) from the temperature and strain-rate dependent strain hardening contribution. Equations are derived for the conversion from parameters describing a fit of data to the Kocks and Mecking model to parameters describing a fit to the Bammann model. The application of the results to measurements in U-0.75 Ti and a W-Ni-Fe alloy is presented. 7 refs., 5 figs., 2 tabs.

Authors:
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
6227444
Report Number(s):
LA-11588-MS
ON: DE89013655
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; IRON ALLOYS; PLASTICITY; NICKEL ALLOYS; MATHEMATICAL MODELS; TITANIUM ALLOYS; TUNGSTEN ALLOYS; URANIUM ALLOYS; COMPARATIVE EVALUATIONS; COMPUTER CODES; STRAIN HARDENING; STRESSES; TEMPERATURE DEPENDENCE; ACTINIDE ALLOYS; ALLOYS; HARDENING; MECHANICAL PROPERTIES; 360103* - Metals & Alloys- Mechanical Properties; 990230 - Mathematics & Mathematical Models- (1987-1989)

Citation Formats

Follansbee, P. S. Comparison between the rate and temperature dependent plasticity models of Bammann and of Kocks and Mecking. United States: N. p., 1989. Web. doi:10.2172/6227444.
Follansbee, P. S. Comparison between the rate and temperature dependent plasticity models of Bammann and of Kocks and Mecking. United States. https://doi.org/10.2172/6227444
Follansbee, P. S. Thu . "Comparison between the rate and temperature dependent plasticity models of Bammann and of Kocks and Mecking". United States. https://doi.org/10.2172/6227444. https://www.osti.gov/servlets/purl/6227444.
@article{osti_6227444,
title = {Comparison between the rate and temperature dependent plasticity models of Bammann and of Kocks and Mecking},
author = {Follansbee, P. S.},
abstractNote = {The strain-rate and temperature dependent plasticity model of Bammann, as implemented in the PRONTO FEM code, is compared with the model of Kocks and Mecking. It is shown that simplified versions of both models can be directly compared. Both models separate the temperature and strain-rate dependent yield stress (in a well annealed condition) from the temperature and strain-rate dependent strain hardening contribution. Equations are derived for the conversion from parameters describing a fit of data to the Kocks and Mecking model to parameters describing a fit to the Bammann model. The application of the results to measurements in U-0.75 Ti and a W-Ni-Fe alloy is presented. 7 refs., 5 figs., 2 tabs.},
doi = {10.2172/6227444},
url = {https://www.osti.gov/biblio/6227444}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {6}
}