About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
General Poster Session
|
Presentation Title |
O-52 (Digital): Explaining the Martensitic Transformation by Optimizing the Strain |
Author(s) |
Felix Therrien, Vladan Stevanović |
On-Site Speaker (Planned) |
Felix Therrien |
Abstract Scope |
We present a new mechanism for the diffusionless transformation of steel from the austenite phase (γ) to the martensite phase (α). Our new mechanism is obtained by minimizing the total Euclidean distance traveled by all the atoms to go from one phase to the other. The resulting path, which has minimal principal strains, consists of a rotated Bain deformation, broken into slip planes every sixth (112)α plane. By minimizing the distance, we seamlessly obtain an invariant plane which makes our result perfectly compatible with the widely accepted Phenomenological Theory of Martensitic Transformations model. From our result we find the Kurdjumov-Sach orientation relationship (OR) and the {225}γ habit plane which have been both extensively reported in literature. We also provide a new explanation for the occurrence of the Pitsch OR in thin films. |
Proceedings Inclusion? |
Undecided |