Mechanical stabilisation is a phenomenon in which displacive transformation is retarded when it occurs from a parent phase which is plastically deformed. Compression experiments, in which plastically deformed austenite was allowed to transform to Widmanstätten ferrite, have revealed that like bainite and martensite, Widmanstätten ferrite is also susceptible to mechanical stabilisation. The amount of Widmanstätten ferrite that could be obtained decreased when the austenite was deformed, as growth became hindered by the accumulated debris of dislocations in the austenite. The microstructure nevertheless became refined as the number density of nucleation sites was increased by the deformation process. Severe deformation eventually led to a recovery in the maximum attainable quantity of Widmanstätten ferrite, because of an overriding effect of the increased nucleation rate. The results are shown to be consistent with the growth of Widmanstätten ferrite occurring by a displacive mechanism.
Materials Science and Engineering, A223 (1997) 179-185.
This file is reprinted from Materials Science and Engineering with permission from Elsevier Science. Single copies of the article can be downloaded and printed for the reader's personal research and study.
 3 Experiments on Widmanstätten ferrite |
 4 Experiments on Widmanstätten ferrite |
 7c Experiments on Widmanstätten ferrite |
 7d Experiments on Widmanstätten ferrite |
 9a Experiments on Widmanstätten ferrite |
 9b Experiments on Widmanstätten ferrite |
 9c Experiments on Widmanstätten ferrite |
 9d Experiments on Widmanstätten ferrite |
 9e Experiments on Widmanstätten ferrite |
 9f Experiments on Widmanstätten ferrite |
 11a Experiments on Widmanstätten ferrite |
 11b Experiments on Widmanstätten ferrite |
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