twinning axis

Atomic Simulation of Two-dimentional Mechanical Behavior for Nano-single Crystal and Nano-bicrystal Copper under Static Tensile Loading;

纳米铜单晶及双晶静拉伸二维力学行为的原子模拟

Previous investigations were mainly performed with polycrystals, but recently we have studied the internal friction of a single boundary by using bicrystals with different misorientations, and some new results have been obtained.

最近作者用不同取向差的双晶试样研究了单个晶界的内耗,取得了一些新的结果。

The rate dependent crystallographic finite element program was implemented in ABAQUS as a UMAT for the analysis of the stress distributions near grain boundary in anisotropic bicrystals and tricrystals, talcing the different crystallographic orientations into consideration.

采用率相关晶体滑移有限元程序对不同取向晶粒构成的双晶体和三晶体在晶界和三晶交点附近的应力集中特性进行了计算分析。

This paper introduces briefly the points of similarity between mineral crystals and buildings,and explicates mainly the use of crystal forms in design of external forms of buildings, such as mountain crystal-form building,beryl-form building,tourmaline-form building,twin-crystal-form building,overgrowth-form building, parallel intergrowth-form building,and inlay-form building.

简述了矿物晶体与建筑的相似性,重点地阐述了晶体形态在建筑物外部体形设计中的应用,如水晶式建筑、绿柱石式建筑、电气石式建筑、晶簇式建筑、双晶式建筑、浮生式建筑、平行连生式建筑和镶嵌式建筑。

The twin structure of Na5[B2P3O13] crystal was observed by the synchrotro.

晶体定向中发现(100)和(001)晶面的一级衍射出现双峰;正交偏光显微镜下观察晶体的(010)切片,看到清晰的明暗条纹;当一束激光正入射(010)切片时,产生衍射现象;用同步辐射白光X射线形貌术拍摄了(100)、(010)和(001)切片的Laue像,观察到了晶体的孪晶结构,再借助(010)切片的化学腐蚀研究,推出该晶体为规则的聚片双晶,其结合面为(001)。

Based on the various twin forms and the crystal structure models of arsenopyrite, it is analysed the structure feature of the crystal boundaries in the twins, inferred the genetic models of these twins, discussed the symmetrical combination of the crystal boundaries.

本文以毒砂的各种双晶现象和结构模型为基础，分析了双晶中各晶界的结构特点，推测各双晶的形成模式，并讨论了晶界对称组合特

Pure aluminum bicrystals with symmetric tilt grain boundaries were grown by Bridgeman method.

采用Ｂｒｉｄｇｅｍａｎ－Ｓｔｏｃｋｂａｒｇｅｒ法制取了一系列具有不同晶界结构参数的纯Ａｌ双晶试样，分别测定它们在不同加热温度和保温条件下的晶界迁移距离和晶界迁移速率。

The crack growth rate of the bicrystals is measured.

对晶界平行裂纹和晶界垂直裂纹的双晶体进行三点弯曲疲劳实验,研究了双晶材料的疲劳裂纹扩展规律,测定了双晶的疲劳扩展速率,揭示了晶界对晶粒疲劳裂纹扩展的屏蔽效应:当裂纹距晶界某一特定长度时,裂纹扩展速率最快;而裂纹顶端交于晶界时,裂纹扩展速率最慢。

The fracture behavior for Ni base bicrystals was studied by experiments.

对单晶体以及晶界平行晶粒裂纹和晶界垂直晶粒裂纹的双晶体的断裂韧性进行了实验研究 。