Cast component having corner radius to reduce recrystallization
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United States of America Patent
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Mar 12, 2019
Grant Date -
Jan 7, 2016
app pub date -
Mar 11, 2014
filing date -
Mar 15, 2013
priority date (Note) -
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Abstract
A cast component includes a cast body that has a single crystal microstructure and an internal corner bounding an internal cavity. The single crystal microstructure defines a critical internal residual stress with respect to investment casting of the cast body using a refractory metal core beyond which the single crystal microstructure recrystallizes under a predetermined condition. The internal corner has a corner radius that is greater than a critical corner radius below which an amount of internal residual stress in the single crystal microstructure exceeds the critical internal residual stress. The internal cavity includes a cross section less than about 20 mils near the corner radius.
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