FRACTAL DESCRIPTION OF GRAIN BOUNDARY CONFIGURATION IN DIRECTIONALLY SOLIDIFIED SUPERALLOYS

Acta Metall Sin

1994, Vol. 30

Issue (5): 200-203 DOI:

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FRACTAL DESCRIPTION OF GRAIN BOUNDARY CONFIGURATION IN DIRECTIONALLY SOLIDIFIED SUPERALLOYS

SUN Lijing; DONG Lianke; ZHANG Jinghua; HU Zhuangqi(Institute of Melal Re- search; Chinese Academy of Sciences; Shenyang)(Manuscript received 3 1 August 1993; in revised form 19 October; 1993)

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SUN Lijing; DONG Lianke; ZHANG Jinghua; HU Zhuangqi(Institute of Melal Re- search; Chinese Academy of Sciences; Shenyang)(Manuscript received 3 1 August 1993; in revised form 19 October; 1993). FRACTAL DESCRIPTION OF GRAIN BOUNDARY CONFIGURATION IN DIRECTIONALLY SOLIDIFIED SUPERALLOYS. Acta Metall Sin, 1994, 30(5): 200-203.

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Abstract Fractal analysis is adoped to study the change of dendrite grain boundary configurations at different solidification rates in two kinds of superalloys. It is found that fractal dimensions of the grain boundaries in both of the alloys increase with the increase of solidification rates. In addition, the relationship between the fractal dimensions of the grain boundaries and the system entropy in the solidified superalloys is discussed from the physical defination of fractal dimension. Correspondent: SUN Liling, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015

Key words: grain boundary configuration fractal directional solidiflcation superalloy

Received: 18 May 1994

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