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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium High Temperature Creep Properties of Advanced Structural Materials
Presentation Title F-2: Effects of Controlling Ti and Al on Microstructure and Mechanical Properties of Fe-Cr-Co-Al-Ti Ferritic Alloys
Author(s) Jeongeun Kim, Kanghyun Park, Byungchan Cho, Karam Lim, Chanho lee, Jiwoon Lee, Gian Song
On-Site Speaker (Planned) Jeongeun Kim
Abstract Scope Fe-Cr-Ni-Al-Ti ferritic alloys strengthened by hierarchically-structured coherent precipitates (B2-NiAl/L21-Ni2TiAl) exhibit excellent creep properties due to optimized coherent lattice strain between the Fe matrix and precipitates. However, These alloys consist of nano-scale B2-NiAl precipitates forming during cooling, which is known to deteriorate the room temperature ductility. In this study, we designed new Fe-Cr-Co-Al-Ti ferritic alloys to avoid the formation of the B2-NiAl cooling precipitate and enhance the mechanical properties at room and high temperatures. Cobalt was employed instead of Nickel to form precipitates coherent with the BCC Fe matrix, such as B2-CoTi, CoAl, and L21-Co2TiAl phases. Furthermore, the main elements to form the coherent precipitates were systematically adjusted to achieve the different volume fraction of the precipitates and optimize the lattice strain between the precipitate and matrix. We will present the microstructure and mechanical properties of newly-designed Fe-Cr-Co-Al-Ti ferritic alloys, characterized using Scanning-Electron-Microscope, Transmission-Electron-Microscope, X-ray Diffractometer, Universal Testing Machine.
Proceedings Inclusion? Planned:
Keywords High-Temperature Materials, Mechanical Properties, Iron and Steel

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Microstructure Sensitive Model to Account for the Non-isothermal Creep Behavior of Ni-based Single Crystal Superalloys
CALPHAD Alloy Design for Diffusion-mediated Plasticity-Induced Phase Transformations for Creep Resistant Multicomponent Principal Elemental Alloy
Creep and Creep-ratcheting Behaviour of Selective Laser Melted (SLM) Additively Manufactured (AM) Inconel 718
Creep and Tensile Properties of Five Novel, Computationally Designed Ni-based SX Superalloys
Creep Behavior at Elevated Temperatures of Several Polycristalline Ni-based Superalloys Strengthened by MC-carbides
Creep Behaviors of High-entropy Alloys
Creep Ratcheting of a HP+NbW (MA) Steam Methane Reformer Tube Alloy
Creep Simulations of Refractory High Entropy Alloys
Crystal Plasticity Creep Modeling in Cobalt Based Superalloys
Effect of Alloying Additions on Twinning in Ni-based Superalloys
Effect of the Casting Process on the Microstructure and Creep Properties of a Cast Ni-Based Alloy
F-1: A Study on Microstructure and Mechanical Properties of Fe-Cr-Ni-Al-V Alloys
F-2: Effects of Controlling Ti and Al on Microstructure and Mechanical Properties of Fe-Cr-Co-Al-Ti Ferritic Alloys
F-3: Strengthening Against Creep at Elevated Temperature of HEA Alloys of the CoNiFeMnCr Type Using MC-carbides
Induction of Alternative Shearing Pathways during Creep Deformation of Nickel Based Superalloys via Local Phase Transformation Strengthening
Mechanisms of Creep in Additively Manufactured NiCoCr and ODS-NiCoCr Multi-principal Element Alloys
Role of Cr Content on Creep-rupture Performance in Alumina-forming Austenitic Alloys
The Elevated Temperature Creep, Fatigue, and Fracture Behavior of Nickel-based Superalloys Manufactured by Direct Metal Laser Sintering
Thermal Creep Models Derived from a Comprehensive Multiple Heat 9Cr Tempered Martensitic Steels Database
Threshold Creep Behaviour of Ni-based Superalloy IN740H

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