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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Phase Transformation Across Multiscale Material Interfaces
Presentation Title Roles of Transformation Interface for Controlling Microstructure and Properties of High Strength Steels
Author(s) Tadashi Furuhara, Yongjie Zhang, Goro Miyamoto
On-Site Speaker (Planned) Tadashi Furuhara
Abstract Scope Alloying effects at transformation interfaces are important in controlling mechanical properties of modern high strength steels. Two examples in low-alloy steels will be discussed with emphasis on thermodynamics, kinetics and crystallography. For strengthening of ferritic steels with interphase precipitation of alloy carbide accompanied ferrite transformation, clarification of conditions for refining carbide dispersion is most important. It will be emphasized that larger driving force of precipitation in combination with incoherent ferrite/austenite interfaces results in finer carbide dispersion. In TRIP-aided low-alloy steels, it is essential to control carbon enrichment in austenite during ferrite/bainite transformations and resulting stability of retained austenite. Recent studies on alloy partitioning including carbon enrichment into austenite give us more insight into the transformation mechanism. We will describe that energy dissipation during interface migration and strain energy accumulation are important factors to control carbon enrichment into untransformed austenite.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Analysis of the Stability of Interfaces Fabricated Using Solid State Welds
Atom Probe Tomography Study of Interface Diffusion Assisted Self-healing Behaviour of Cr2Al(Si)C MAX Phase Coatings
Atomic-scale Characterization of Solute Segregation in Interfaces in Light Alloys
Effect of Lattice-level Covalent Character on Phase and Interfacial Stability in Mg-alloys
Efficient and Systematic Study of Phase Transformations Using Dual-anneal Diffusion Multiples
Exploiting Non-conventional Pathways for Transformations and Microstructural Evolution in Metastable Beta Ti Alloys
Grain Boundary Microstates under Irradiation: Which Came First?
Interdiffusion and Kinetics Study of Ti-Al Intermetallic by Brazing
Microstructural Characterization of Linear Friction Welded Interfaces in Ti-based Alloys
Modeling of Complexion Transitions at One- and Two-dimensional Defects
Modeling Transitions at Interfaces
Morphological Evolution and Mechanical Behavior of Co-sputtered Cu-Mo Thin Films
Nanoscale Interfacial Phase Structures in Roll-bonded Metallic Glass Composite Materials
Prevention of Coarsening Induced Phase Transformations in Al-Cu Alloys: Role of Interfaces
Roles of Transformation Interface for Controlling Microstructure and Properties of High Strength Steels
Structure and Mechanical Response of Highly Defective Grain Boundaries
Structure and Properties of BCC Mg Synthesized Using Interface Strain Engineering
The Effect of Diffusion on the Microstructure and Properties of a NiAl-based Anchor Phase Coating for CMSX-4
Transient-liquid-phase-bonding and Mechanical Properties of Ni-based-superalloy-H230 for Heat Exchangers in Supercritical CO2 Power Cycles

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