A micro-mechanical model of non-thermo-elastic martensitic transformation

作者：Sun Chao Yang^*; Fang Gang; Lei Li Ping; Zeng Pan

来源：Materials Science and Technology, 2009, 17(4): 445-449.

• Austenitic
• Constitutive theory
• Crystallographic theory
• Ferrous alloys
• Flow theories
• Internal variables
• Intrinsic characteristics
• Martensitic variants
• Micro-mechanical
• Micromechanical behavior
• Micromechanical model
• Microstructure evolutions
• Plastic strain
• Uni-axial loading

In order to describe the intrinsic characteristic of ferrous alloy during martensitic transformation, micro-mechanical behavior of non-thermo-elastic martensitic transformation was investigated. Based on the crystallographic theory of martensitic transformation and internal variable constitutive theory, a micro-mechanical constitutive model of non-thermo-elastic martensitic transformation was developed. Plastic strains of product and parent phases as well as the volume fraction of each martensitic variant were taken as the internal variables describing the microstructure evolution of the micro-domain. The constitutive equation of an austenitic single crystal was presented. Only plasticity in the sense of J2 flow theory was considered at the level of micro-region because of high calculation efforts. The micro-mechanical model was applied to the behavior study under uniaxial loading. It is showed that non-thermo-elastic martensitic transformation occurs with the increasing strain, which enhances the intensity of the material.

• 出版日期2009