Microstructures in Cold-Rolled Ni 3 Al Single Crystals
Microstructures in Cold-Rolled Ni 3 Al Single Crystals
复制标题
冷轧Ni 3 Al单晶的显微组织
DOI：
10.1557/proc-842-s5.22
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
T. Hirano
中科院分区：
文献类型：
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作者：
K. Kishida;M. Demura;T. Hirano
用光学显微镜(OM)和透射电子显微镜(TEM)研究了二元化学计量比Ni3Al单晶在冷轧过程中的组织演变。在初始RD的情况下，形成带状结构。在每个基质带内，局域剪切变形在两个{111}面上交替发生。此外，从冷轧相对早期就观察到大量广泛扩展的超晶格本征层错(SISF)。局域剪切变形的发生被认为是由SISF控制的，因为它们肯定是位错在另一个滑动面上运动的强烈障碍。因此，SISF的广泛形成被认为是控制Ni3Al冷轧行为的最重要的组织特征之一。
Microstructure evolution during cold rolling of binary stoichiometric Ni 3 Al single crystals was examined by the optical (OM) and transmission electron microscopy (TEM). In the case of the initial RD, the banded structure is formed. Inside each matrix band, the localized shear deformations occur alternately on two {111} planes. In addition, huge amounts of widely extended superlattice intrinsic stacking faults (SISFs) are observed from relatively early stage of cold rolling. The occurrence of the localized shear deformation is considered to be controlled by the SISFs since they must be strong obstacles for the dislocation motion on the other glide plane. The extensive formation of the SISFs is therefore considered to be one of the most important microstructural features which control the cold rolling behavior of Ni 3 Al.