ニッケル単結晶下部組織のX線的研究

抄録

An examination was carried out by the X-ray diffraction microscopy with respect to misoriented sub-structures in the crystals which had been grown from the melt in the [001] direction. It is found that within the range of the lowering speed from 1 to 10 mm/min, the specimen consists of the two types of sub-structure whose boundaries extend together in the direction parallel to the [001] axis. One type of sub-structure is that which is termed “striations” and the other is the sub-structure, developed by branching off of sub-boundaries during the growth. A mechanism of the latter formation is discussed on the basis of the fact that super-cooling liquid exists inside the groove which is formed at the solid-liquid interface meeting the sub-boundary.