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Time-Dependent Ginzburg–Landau equation modelling of electron beam additive manufactured Titanium alloy

Olanipekun, Ayorinde Tayo and Abioye, Abiodun A. and Oluwabunmi, Kayode Emmanuel (2018) Time-Dependent Ginzburg–Landau equation modelling of electron beam additive manufactured Titanium alloy. Leonardo Electronic Journal of Practices and Technologies, 32. pp. 93-102. ISSN 1583-1078

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In this study, the micro-structure evolution in Electron beam additive manufacturing (EBAM) process of Ti–6Al–4V is studied using phase-field modelling. EBAM involves a rapid solidification process and the properties of a build partly depend on the solidification behaviour as well as the micro-structure of the build material. Phasefield modelling was applied to study the evolution of micro-structural scale of dendrites during the Ti-6Al-4V alloy solidification in the EBAM process. The mechanical properties of the final build parts are dependent on the solidification rate which affects the micro-structure of the material. Thus, the evolving of micro-structure plays a critical and effective role towards process parameters optimization. Recent increase in computational power allows for direct simulations of micro-structures during materials processing for specific manufacturing conditions. A MATLAB code was developed to solve the set of Time-Dependent Ginzburg–Landau equation phase field equations. The effect of under-cooling was investigated through the simulations; the greater the under-cooling, the faster the dendrite grows. The micro-structure simulations shows the growth of primary β phase, which has a body-centred cubic crystal structure phase with four fold symmetry comparable with experimental results for the tested range.

Item Type: Article
Uncontrolled Keywords: Additive manufacturing; Phase field modelling; Electron Beam Additive Manufacturing (EBAM); Micro-structure; Titanium alloy
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 30 Jul 2018 12:12
Last Modified: 30 Jul 2018 12:12

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