期刊
SCRIPTA MATERIALIA
卷 124, 期 -, 页码 34-37出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.06.032
关键词
Solidification; Al-Ge alloys; Solutal concentration; In-situ X-radiography; Dendrite growth
An important tool to study dendritic growth in metallic alloys is the in-situ polychromatic X-radiography. Since solutal interaction is a dominant factor influencing dendrite growth, the determination of liquid concentrations is crucial to interpret the image data. Laboratory experiments with polychromatic X-ray sources require reference measurements of samples of known composition and thickness to convert intensities into concentrations because of the wavelength dependency of the absorption coefficient. Calibration measurements and fitted intensity functions are used to determine solutal concentrations in an Al-Ge sample without using in-situ reference samples. (C) 2016 Elsevier Ltd. All rights reserved.
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