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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Computational Design and Simulation of Materials (CDSM 2018): Computational Design of Materials
Presentation Title The Fundamental Thermodynamic Investigation on the Grade 91 Alloy
Author(s) Andrew Logan Smith, Yu Zhong
On-Site Speaker (Planned) Andrew Logan Smith
Abstract Scope Grade 91 (Gr.91) steel is a type of material used in most fossil-fuel industries. It, which has a combination of both high amounts of Cr modified with certain elements to precipitate out secondary phases such as V and Nb for MX and small additions of Mo for M23C6, gives the material such high creep strength. Type IV cracks are the main issue for creep failure in Gr.91 and they appear in the Heat-Affected-Zone (HAZ) which is formed during the welding process. The HAZ has three particular areas of interest: Coarse-Grain HAZ, Fine-Grain HAZ, and Inter-Critical HAZ and are all influenced by the Ac1 and Ac3 temperatures. The research presented deals with C, Ti, and N in Gr.91 and their influences on Ac1 and Ac3 temperatures. The CALPHAD approach will be used with Thermo-Calc to determine the microstructure and stability of the critical secondary phases of the material.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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Application of Computational Thermodynamics in Yittria Stablized Zirconia System
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Automated Computer Design of Kinematically Active Molecular Materials
Building a Co Diffusion Mobility Database for γ/γ’ Co-Superalloys
Calphad-type Assessment of the Ni-Ti-Hf System Combined with the DFT Calculations
Computational Design and Simulation of Ultralow Modulus, Hysteresis-free, and Linear Pseudo-elastic Shape Memory Alloy
Computational Design of Metastable Austenite in the Advanced Transformation Induced Plasticity Steels
Computational Microstructure Characterization and Reconstruction for Multi-scale Analysis of Multi-phase AHSS
Computational Thermodynamic and Machine Learning Approach to Accelerate the Design of High-temperature Alloys
Computational Thermodynamics Aided Design of Co-based γ'-strengthened Superalloys
Coupling Void Coalescence Criteria in Finite Element Models: Application to Tensile Test
Design of a New Multi-element Beta Titanium Alloy Based on D-electron Method
Diffusion Couple Experiments to Support the Development of a Diffusion Mobility Database for the Co-Al-W-Ni-Cr-Ta System
Effect of Stability of Critical Phases in Nickel-based Superalloys: Combined Machine Learning and CALPHAD Approach
ICME-Based Computational Materials Genomic Design
Investigation of Order-disorder Transition in Multi-principal-element Alloys
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Study on the Effect of Applied Pressure on Directional Dendritic Growth by In-situ Observation
The Fundamental Thermodynamic Investigation on the Grade 91 Alloy
Theoretical Investigation of Vacancy Concentration and its Effect on the Kinetics of B2 – L21 Ordering in Ni-Co-Mn-In MetaMagnetic Shape Memory Alloys
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