International Seminar on Mechanics and Mechanisms of Solid-Solid Phase Transformations
J. Phys. IV France 06 (1996) C1-321-C1-333
Theory of Martensitic Unelasticity of CrystalsV.A. Likhachev
Res. Inst. Math. Mech. (NIIMM) St.-Petersburg State Univ., Bibliotechnaya pl. 2, Petrodvorets, 198904 St.-Petersburg, Russia
It has been formulated a rather simple model of martensitic unelasticity due to martensitic transformations of the first order. It is based on the idea that a martensitic reaction comes out as a mechanism of unelastic micro-strain. An equation describing the variation of the size of martensite crystals in the direct and reverse reactions has been proposed. Kinetics of these reactions is determined by two external factors : temperature and stress. Macroscopic strain is calculated by orientation averaging of micro-strains. There are given examples of simulation of mechanical characteristics of a model material. A satisfactory correspondence has been established between the calculated and actually observed effects.
© EDP Sciences 1996