A method is presented for calculating both the macroscopic strains and crystallographic bias which develop when a polycrystalline sample of austenitic steel is transformed into bainite or martensite under the influence of an applied stress or a system of stresses. Any texture present in the austenite prior to transformation is taken into account, as is the detailed crystallography of the transformation. Comparisons with experimental data are encouraging. A strong correlation has been observed between the proportion of the driving force for transformation that is attributed to stress, and the extent of variant selection.
A two-minute interview conducted by Mathew Peet, about the research documented in the paper.
MAP_STEEL_TEXTURE |
PROGRAM: Calculation of the crystallographic texture obtained when austenite transforms into martensite. The austenite itself can be textured. |
MAP_STEEL_TEXTURE2 |
PROGRAM:To produce a non-random, crystallographically textured distribution of austenite grains. |
MAP_STEEL_TEXTURE3 |
PROGRAM:Calculation of habit plane, shape deformation and orientation relationship between austenite and martensite or bainite, as a function of the correspondence matrix and the lattice invariant deformation. |
MAP_STEEL_DIFFRACT_FERRITE |
PROGRAM:Calculation of Debye X-ray diffraction rings due to stress-induced transformation of polycrystalline austenite. The sample may be textured. |
MAP_STEEL_DIFFRACT_AUSTENITE |
PROGRAM:Calculation of Debye X-ray diffraction rings for polycrystalline austenite. The sample may be textured. |
MAP_STEEL_TRANS_PLASTICITY |
PROGRAM:Calculation of transformation strain and crystallographic orientation of the 24 variants of martensite or bainite that form in a singel grain of austenite in an arbitrary orientation. |