International Seminar on Mechanics and Mechanisms of Solid-Solid Phase Transformations
J. Phys. IV France 06 (1996) C1-455-C1-463
Transformation Thermomechanics of Alloy Materials in the Process of Martensitic Transformation : A Unified TheoryK. Tanaka1, F. Nishimura1, F.D. Fischer2 and E.R. Oberaigner3
1 Department of Aerospace Engineering, Tokyo Metropolitan Institute of Technology, Asahigaoka 6-6, 191 Hino, Tokyo, Japan
2 Institute of Mechanics and Christian Doppler Laboratory for Micromechanics of Materials, University for Mining and Metallurgy, Franz-Jozef Strasse 18, 8700 Leoben, Austria
3 Institute of Mechanics, University for Mining and Metallurgy, Franz-Jozef Strasse 18, 8700 Leoben, Austria
A unified theory on the transformation and thermomechanical behavior of alloy materials is proposed in the processes of plastic deformation and martensitic transformation. A transformation condition is introduced to describe the start and progress of the transformation, together with the yield condition for plasticity. The constitutive equations, thermomechanical and calorimetric, are derived following the conventional continuum mechanics whereas the evolutional equations for the internal variables are obtained by solving a conditional extremum problem. The heat conduction equation is presented. The transformation kinetics is discussed to reach Magee's kinetics.
© EDP Sciences 1996