Abstract
Low alloyed TRIP-steels with noticeable amounts of carbon stabilised retained austenite can be obtained from commercial dual-phase steels. During the deformation of TRIP-steels the austenite undergoes a strain induced martensitic phase transformation, which enhances the plastification of the material. The microstructure of TRIP-steels consists of a bainitic-ferritic matrix with small spherical austenitic inclusions. Using a thermodynamical approach based on the Gibbs free energy and an appropriate micromechanical unit cell model, the strain induced transformation can be modeled conveniently. It is shown, that the carbon concentration of the austenite is of great importance to its stability against the martensite formation. The role of the transformation strain tensor is elucidated.
| Original language | English |
|---|---|
| Pages (from-to) | 165-175 |
| Number of pages | 11 |
| Journal | American Society of Mechanical Engineers, Applied Mechanics Division, AMD |
| Volume | 212 |
| State | Published - 1995 |
| Externally published | Yes |
| Event | Proceedings of the 1995 ASME International Mechanical Engineering Congress and Exposition - San Francisco, CA, USA Duration: 12 Nov 1995 → 17 Nov 1995 |