EFFECT OF CARBON AND BORON ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A SINGLE CRYSTAL SUPERALLOY RR 2072

Abstract

Abstract: Carbon and boron have been considered to strengthen grain boundaries that might form during single crystal casting. In this study the effect of boron on solidification behavior and creep properties of the carbon doped single crystal RR 2072 has been investigated. In order to understand solidification behavior with boron addition, the solid/liquid interface morphology and solidification microstructare were examined with solidification rate. The relationship between microstructaral evolution and creep properties of the carbon and boron modified single crystal has been also investigated.

Key words: single crystal superalloy, defect tolerance, directional solidification

D.H.Kim. EFFECT OF CARBON AND BORON ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A SINGLE CRYSTAL SUPERALLOY RR 2072[J]. Acta Metallurgica Sinica (English Letters), 2005, 18(1): 33-38 .

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EFFECT OF CARBON AND BORON ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A SINGLE CRYSTAL SUPERALLOY RR 2072

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