摘要
用高温度梯度定向凝固装置研究了CMSX-2单晶高温合金初始过渡区的组织演化特征,获得了不同条件下过渡区单晶高温合金的平-胞-枝组织结构,以及相应的一次胞枝晶间距大小,发现初始过渡区的凝固过程影响到最终获得的凝固组织,采用的匀加速抽拉方式有利于提高单晶的引晶率和单晶凝固组织的完整性.
The behavior of interface morphology evolution of a transitional zone in CMSX-2 single crystal superalloy was investigated by using high-temperature gradient directional solidification apparatus. The results show that various solidified microstructures, such as planar, cellular and dendrite structure, and primary spacing arm of cellular and dendrite structures have been obtained with different transitional solidification processings. In addition, the accelerating model of drawing rate is favorable to successfully improve single crystal growth and microstructure integrality.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第11期1195-1198,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金59995440
航空基金01G53038资助项目
关键词
组织演化特征
高温度梯度
定向凝固
镍基单晶合金
high-temperature gradient
directional solidification
Ni-base single crystal alloy
