Quantification of microstructure to reveal the solidification path of an alloy

Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining

土木建筑工程;计算机科学

Bogno, A.-A.^1 ; Hearn, W.^1 ; Spinelli, J.E.^1^2 ; Valloton, J.^1 ; Henein, H.^1

Department of Chemical and Materials Engineering, University of Alberta, Edmonton

AB

T6G 2G6, Canada^1

Department of Materials Engineering, Federal University of São Carlos, São Carlos, SP

13565-905, Brazil^2

关键词: Continuous cooling transformation diagrams;    Phase fractions;    Solidification models;    Solidification paths;    Solidified alloys;    Solidified microstructures;    Thermal history;    Undercooling temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012056/pdf
DOI  :  10.1088/1757-899X/529/1/012056

来源: IOP

【 摘 要 】

This paper reports on the development of Solidification Continuous Cooling Transformation diagrams that relate the solidification paths to the inherent microstructures of binary and ternary alloys. The methodology is based on the quantification of a solidified microstructure for its various phase fractions. This measured data is combined with well-established solidification models and phase diagrams to yield undercooling temperatures of individual phases. The thermal history and undercooling of different phases in the solidified alloy are estimated for a wide range of cooling rates (from 10-2 °Cs-1 to 105 °Cs-1). To describe the methodology, dedicated samples of Al-Cu, Al-Cu-Sc and Al-Si alloys were studied. With said alloys being solidified in a controlled manner, over a wide range of cooling rates and undercoolings, via Impulse Atomization, Electro-Magnetic Levitation, and Differential Scanning Calorimetry.