EFFECT OF COOLING RATE ON THE RAPIDLY SOLIDIFIED MORPHOLOGY OF MC CARBIDE OF A LASERGLAZED SINGLE-CRYSTAL NI-BASE SUPERALLOY

Wang Huaming  Zhang Jinghua  Tang Yajun  Zhang Zhiya  Hu Zhuangqi

(Institute of Metal Research, Academia Sinica)

Abstract: The effect of cooling rate on the growth morphology of MC carbide of a laserglazed single crystal Ni-base superalloy was comprehensively studied. The growth morphology of the rapidly solidified MC carbide was found in various very special radially arranged colonies which vary considerably with the solidification cooling rate and solidifying font shapes. The effect of cooling rate on the growth morphology is actually its direct influence on the solute-enriched liquid.
Key words: Carbide  Solidification  Superalloy
国家自然科学基金及国家博士后科学基金资助项目. Received 19910328, received in revised form 19920117