|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||The Atomic Level Structure and Chemistry of Interfaces Between Iron and Cementite
||Christopher Robert Weinberger, Matthew Guziewski, Shawn P. Coleman
|On-Site Speaker (Planned)
||Christopher Robert Weinberger
While the behavior of steel has been studied extensively for decades, there are still open questions regarding the microstructures it forms especially at the interfacial level. In this talk, we examine the validity of atomistics in gaining further insight into the structure of pearlite with particular emphasis on the Bagarystkii Orientation. The structure of the interface is shown to always be comprised of a set of perpendicular dislocations. However, the amount of spreading of the interfacial dislocations depends on which of the cementite planes form the interface, demonstrating the importance of chemistry. This, in turn, controls the interfacial energy, which will dictate the actual interfacial structure. A continuum model compares well both energetically and structurally with the atomic level models but fails to discern chemistry (and hence local structural effects) highlighting the need for atomic level descriptions. Coupling between this atomic structure and deformation will also be discussed.