Monitoring the solidification of single-crystal castings using high-energy x-ray diffraction

A noninvasive x-ray technique was developed at the US National Institute of Standards and Technology to monitor the solidification of single-crystal castings. X-ray energies of 150-320 keV have sufficient energy to perform transmission x-ray diffraction on a 17 mm thick nickel-alloy specimen. Laue d...

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Bibliographic Details
Published inJOM (1989) Vol. 51; no. 7; p. 13
Main Authors Fitting, D W, Dube, W P, Siewert, T A
Format Journal Article
LanguageEnglish
Published 01.07.1999
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Summary:A noninvasive x-ray technique was developed at the US National Institute of Standards and Technology to monitor the solidification of single-crystal castings. X-ray energies of 150-320 keV have sufficient energy to perform transmission x-ray diffraction on a 17 mm thick nickel-alloy specimen. Laue diffraction images were obtained from the mold-encased casting even though the x-ray path ( > 1 m) through a directional-solidification furnace included a variety of intervening furnace components. The x-ray method was capable of sensing changes in the physical state of the casting (liquid or solid) and measuring the fraction of solid in the region of dendritic solidification. Other materials discussed include gallium, aluminum and copper.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1047-4838