In-situ solute measurements with a laboratory polychromatic microfocus X-ray source during equiaxed solidification of an Al-Ge alloy
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- 作者：M. Becker ; maike.becker@dlr.de" class="auth_mail" title="E-mail the corresponding author ; S. Klein ; F. Kargl
- 关键词：Solidification ; Al-Ge alloys ; Solutal concentration ; In-situ X-radiography ; Dendrite growth
- 刊名：Scripta Materialia
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：124
- 期：Complete
- 页码：34-37
- 全文大小：1318 K
文摘
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.