Thermal stress history displayed in an Ashby type diagram, application to the continuous casting of aluminum alloys
- EPM-Madylam, Saint Martin D`Heres (France)
- LTPCM, Saint Martin D`Heres (France)
In solidification processes, thermal contraction in the solid state can make internal stresses, and possibly cracks. The formation of such defects is history-dependent, i.e., it depends on the time evolution of the relevant parameters, temperature, stress, strain rate. The authors propose to display this history on Ashby type diagrams, i.e. as normalized stress-temperature plots.This proposal is illustrated in a particular application, the continuous casting of aluminum alloys. The authors built a simple semi-analytical model to predict the thermal stress history. They apply it with five constitutive laws currently used: plastic type laws, creep laws and Ashby law (in fact the sum of every mechanism law involved in aluminum Ashby`s map). The proposed presentation makes it clear that plastic type laws should be avoided. More generally, Ashby type diagram could be used as a test for constitutive laws before their application in numerical models for non-isothermal processes, in solidification, shape casting, welding.
- OSTI ID:
- 227754
- Report Number(s):
- CONF-9509118-; ISBN 0-87339-297-3; TRN: IM9622%%31
- Resource Relation:
- Conference: 7. Conference on modeling of casting, welding and advanced solidification processes, London (United Kingdom), 10-15 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Modeling of casting, welding and advanced solidification processes, 7; Cross, M. [ed.] [Univ. of Greenwich, London (United Kingdom). Centre for Numerical Modeling and Process Analysis]; Campbell, J. [ed.] [Univ. of Birmingham (United Kingdom). School of Metallurgy and Materials]; PB: 1030 p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
ALUMINIUM ALLOYS
CASTING
MATHEMATICAL MODELS
LIQUID METALS
SOLIDIFICATION
STRESSES
STRAIN RATE
CRACKS
TEMPERATURE DISTRIBUTION
DEFORMATION
ELASTICITY
FINITE DIFFERENCE METHOD
PLASTICITY
STRAIN HARDENING
CREEP
DIFFUSION