Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Non-Linear Analytical Modeling and Simulation of Microstructural Evolution in Zr Based Metallic Glass Matrix Composites During Solidification Using MATLAB® – Further Results

Version 1 : Received: 16 October 2020 / Approved: 27 October 2020 / Online: 27 October 2020 (21:31:41 CET)

How to cite: Rafique, M.M.A. Non-Linear Analytical Modeling and Simulation of Microstructural Evolution in Zr Based Metallic Glass Matrix Composites During Solidification Using MATLAB® – Further Results. Preprints 2020, 2020100497 (doi: 10.20944/preprints202010.0497.v1). Rafique, M.M.A. Non-Linear Analytical Modeling and Simulation of Microstructural Evolution in Zr Based Metallic Glass Matrix Composites During Solidification Using MATLAB® – Further Results. Preprints 2020, 2020100497 (doi: 10.20944/preprints202010.0497.v1).

Abstract

Metallic glass matrix composites are unique new materials which have superior mechanical properties as compared to existing conventional materials. Owing to this, they are potential candidates for various future structural applications. However, they suffer from disadvantages of brittleness, poor ductility and little or no toughness and they manifest catastrophic failure on application of force. Their behavior is dubious and require extensive experimentation to draw conclusive results. In present study, which is continuation of previous study by author, an effort has been made to overcome this pitfall by simulation. A quantitative mathematical model based on KGT theory has been developed to describe nucleation and growth of crystalline phase dendrites in glassy matrix during solidification. It yields information about numerical parameters to understand the behavior of each individual element in a phase in multicomponent sluggish slurry and their effect on final microstructural evolution. Model is programmed and simulated in MATLAB®. Its validation is done by comparison with identical curves reported in literature previously for similar alloys. Results indicate that effect of incorporating all heat transfer coefficients at macroscopic level and diffusion coefficients at microscopic level play a vital role in refining the model and bringing it closer to actual experimental observations. Two types of hypoeutectic and eutectic systems namely Zr65Cu15Al10Ni10 and Zr47.5Cu45.5Al5Co2 respectively were studied. Simulation results were found to be in good agreement with prior simulated and experimental values

Subject Areas

metallic glass; composites; simulation; inoculation; iteration

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