Direct observation of an extended complex stacking fault in the γ′ phase of a Ni-base superalloy
Direct observation of an extended complex stacking fault in the γ′ phase of a Ni-base superalloy
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DOI：
10.1016/j.scriptamat.2006.06.019
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发表时间：
2006-10
影响因子：
6
通讯作者：
P. Sarosi;G. Viswanathan;M. Mills
中科院分区：
文献类型：
--
作者：
P. Sarosi;G. Viswanathan;M. Mills
利用晶体学分析和模拟和实验高分辨率透射电镜（HRTEM）图像的比较，研究了多晶镍基高温合金（Rene 88dt）的蠕变变形机制。确认蠕变变形中涉及的部分位错的伯格矢量的大小对于最终确定其性质至关重要。提出了一种利用实验HRTEM图像的超晶格图像对比确定复杂层错的新方法。
A creep deformation mechanism in a polycrystalline nickel-base superalloy (Rene 88 DT) has been examined using crystallographic analysis and comparison between simulated and experimental high-resolution transmission electron microscopy (HRTEM) images. Confirmation of the magnitude of the Burgers vector of the partial dislocations involved in the creep deformation was critical in conclusively determining its nature. A new approach to determining a complex stacking fault was developed using superlattice image contrast from an experimental HRTEM image.