pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (27권2호 77-82)
Dendrite Arm Spacing and Carbide Morphology with Thermal Gradient and Solidification Rate in Directionally Solidified Ni-Base Superalloy
일방향 초내열합금에서 응고속도 및 온도구배 따른 수지상간격 및 탄화물 형상 변화
S.D. Son, Y.H. Kim , GS. Choi, J.H. Lee, S.M. Seo*, C.Y. Jo*
Changwon National University，*Korea Institute o f Machinery and Materials
The effects of thermal gradient and solidification rate on the dendrite arm spacing and carbide morphology were investigated in directionally solidified Ni-base superalloy, CM 247LC. Thermal gradient was controlled by changing the position of the cold chamber and the furnace set temperature. The interface morphology changed from the planar to dendritic as increasing solidification rate. It was found that the dendrite spacing decreased as increasing the thermal gradient as well as the solidification rate. Also, as increasing solidification rate, carbide morphology changed from blocky shape to script and spotty shapes.
Directional superalloy, Directional solidification, Solidification rate, Thermal gradient, Dendrite arm spacing
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