Strain-induced structural changes and chemical reactions. 1: Thermomechanical and kinetic models
Journal Article
·
· Acta Materialia
- Univ. of Hannover (Germany). Inst. for Structural and Computational Mechanics
- Univ. of California, San Diego, La Jolla, CA (United States). Dept. of Applied Mechanics and Engineering Sciences
Strain-induced chemical reactions were observed recently (Nesterenko et al) in experiments in the shear band in both Ti-Si and Nb-Si mixtures. Reactions can start in the solid state or after melting of at least one component. One of the aims is to find theoretically whether there are possible macroscopic mechanisms of mechanical intensification of the above and other chemical reactions due to plastic shear in the solid state. Continuum thermodynamical theory of structural changes with an athermal kinetics, which includes martensitic phase transformations, plastic strain-induced chemical reactions and polymorphic transformations, is developed at finite strains. The theory includes kinematics, criterion of structural change and extremum principle for determination of all unknown variable parameters for the case with neglected elastic strains. Thermodynamically consistent kinetic theory of thermally activated structural changes is suggested. The concept of the effective temperature is introduced which takes into account that temperature can vary significantly (on 1,000 K) during the chemical reactions under consideration. The theory will be applied in Part 2 of the paper for the description of chemical reactions in the shear band.
- OSTI ID:
- 289504
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 16 Vol. 46; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Strain-induced structural changes and chemical reactions. 2: Modelling of reactions in shear band
Relationships Between the Phase Transformation Kinetics, Texture Evolution, and Microstructure Development in a 304L Stainless Steel Under Biaxial Loading Conditions: Synchrotron X-ray and Electron Backscatter Diffraction Studies
Martensitic transformation as a deformation process
Journal Article
·
Fri Oct 09 00:00:00 EDT 1998
· Acta Materialia
·
OSTI ID:289505
Relationships Between the Phase Transformation Kinetics, Texture Evolution, and Microstructure Development in a 304L Stainless Steel Under Biaxial Loading Conditions: Synchrotron X-ray and Electron Backscatter Diffraction Studies
Journal Article
·
Tue Feb 10 23:00:00 EST 2015
· Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
·
OSTI ID:1392352
Martensitic transformation as a deformation process
Conference
·
Tue Dec 31 23:00:00 EST 1985
·
OSTI ID:6671869