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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Materials Processing Fundamentals
Presentation Title Time Variation of Concentration-dependent Interdiffusion Coefficient
Author(s) Osamudiamen Olaye, Olanrewaju Akanbi Ojo
On-Site Speaker (Planned) Osamudiamen Olaye
Abstract Scope The long-held assumption that the concentration dependence of interdiffusion coefficient (D(C)) is an isothermal constant that does not change with time is investigated theoretically and experimentally. Theoretically, D(C) is evaluated from concentration profiles obtained numerically at different times under the influence of diffusion-induced stress. Experimentally, a new numerical model and the forward simulation technique are used to extract D(C) from several experimental profiles at several diffusion times. Although not commonly acknowledged, the results of the theoretical and experimental investigations show that even in binary systems, under isothermal conditions, D(C) can significantly change with time. Furthermore, trivializing this concept can lead to a notable misinterpretation of experimental data, including a consequential misidentification of the mechanism of microstructural changes by phase transformation reactions.
Proceedings Inclusion? Planned:
Keywords Phase Transformations, Copper / Nickel / Cobalt, Modeling and Simulation

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Anomalous Temperature Effect on Diffusion-controlled Solidification Time during Diffusion Brazing
Comprehensive Recovery of Pressure Acid Leaching Residue of Zinc Sulfide Concentrate
Effect of Laser Heat Treatment and Nitrogen Content in Shielding Gas on Precipitation of Widmanstätten Austenite in Lap Laser Welds of Duplex Stainless Steels
Evaluation of Phase Relations for the Al-Cu-Mg-Si-Zn System around Eutectic Composition
Experimental Phase Diagram Study in CaO-MgO-V2O5 System
F-33: Phase Equilibria in the Ag–Ge–Bi–Te System and Thermodynamic Properties of the nGeTe×mBi2Te3 (n, m = 1-4) Layered Compounds
Finite Element Analysis Modeling of Gravity-driven Multiple Effect Thermal System (G-METS) Distillation for Efficient Low-cost Magnesium Refining
Measurement of Thermodynamic Property of Mg in Molten Iron at 1823 K by Transpiration Method
NOW ON-DEMAND ONLY – Strategies for the Upgrade of a TBZC Product (Tetra Basic Zinc Chloride) by Selective Removal of the Impurity Chlorine
Parametric Study of Mold Electromagnetic Stirring: Effects of Load Condition and Copper Resistivity
Phase and Microstructural Analysis of In-situ Derived Alumina-TiB2 Composites
Potentiostatic Electrodeposition of Ti-Al Alloy with 40% Titanium from the Lewis Acidic 1-butyl-3-methylimidazolium Chloride-aluminum Chloride Ionic Liquid Electrolyte
Prediction of Distribution of Composition of Inclusion in Continuous Casting Bloom of the Heavy Rail Steel Coupling Element Segregation, Heat Transfer and Kinetics
Pulsed Electric Current Joining of Oxide-dispersion-strengthened Austenitic Steels
Site Preference of Ti in 6H-SiC: A Combined Photoluminescence and Theoretical Calculation Study
Study of γ'-Fe4N Material Annealing through Molecular Dynamics Modeling
Study on the Interface Structure and Element Distribution of Manganese-containing Slag
Thermodynamic Properties of Sulfur in the CaO–AlO1.5–CeO1.5 Slag System at 1873 K
Thermoelectric Magnetohydrodynamic Control of Melt Pool Dynamics and Microstructure Evolution in Direct Energy Deposition Additive Manufacturing
Time Variation of Concentration-dependent Interdiffusion Coefficient
Ultrasonics in Levitating Droplets
Voltammetric Investigations of the Dissolution of Copper in Acidic Cupric Chloride Solutions Containing Additional Dissolved Cuprous Ions

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