|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations in Multi-component Systems: An MPMD Symposium Honoring Gary R. Purdy
||An In-situ TEM Investigation of a Reverse Martensite Transformation in an Fe-20Ni-5.4Mn Alloy
||Frédéric Mompiou, Jing Wu, Wenzheng Zhang
|On-Site Speaker (Planned)
This presentation reports an in-situ TEM investigation of a reverse martensite transformation in an Fe–Ni–Mn alloy at temperature ranging from 400°C to 600°C. This investigation revealed coexistence of various modes of interface motions. Two modes, normal and ledge motions, have been observed during retreating migration of the broad interfaces (~habit plane) between austenite and martensite, associated with fast and slow migration rate, respectively. A large number of dislocations nearly perpendicular to the interface were observed in the volume swept by a fast normal motion of the interface, while few dislocations are left behind in the fresh austenite transformed by a ledge motion. During the ledge motion, concurrent displacement of the interfacial dislocations along both ledge riser and terrace plane is evidently detected. Migration of other parts of existing interfaces and growth of newly nucleated austenite will also be reported.
||Planned: A print-only volume