孪晶由孪晶过程形成的。用于晶体。
在液氮中快淬得到的单晶是无孪晶的。
The twin free crystals were obtained by quenching into liquid nitrogen.
组元中马氏体的精细结构为孪晶亚结构。
Fine structure of martensite in M-A constituents is twin sub structure.
利用矩阵方法处理了孪晶的电子衍射谱。
The method of the matrix is applied to analyze the SADPs of the twins.
两种制度的组织均为主要是孪晶型马氏体。
The structure of the two system is mainly the twin-type martensite.
孪晶的精细结构为位错；
位错和孪晶的密度增加。
And the density of dislocations and twins increased simultaneously.
随轧制方向不同，孪晶在形变中的行为也不同。
Twin lamellae will be deformed differently when rolling in different direction.
T2内晶粒有所长大，而且也出现了退火孪晶。
裂尖前方可能发生形变孪晶，裂纹沿孪晶界扩展。
Local cleavage fracture might happen in the front of crack tip.
退火后，孪晶逐渐消失，形成等轴的再结晶晶粒。
The twins disappeared gradually and recrystallized grains formed after annealing.
退火后，孪晶逐渐消失，形成等轴的再结晶晶粒。
The twinning disappeared gradually and recrystallized grains formed after annealing.
应变诱发马氏体首先在原奥氏体晶界和孪晶界形核。
These lath martensite first nucleates in parent austenite intergranular and twin boundary.
我们绘制了该晶体的结构投影图和孪晶结构示意图。
The projection of KPB crystal structure and schematic diagram of twinning structure have been drawn.
这些微区分别为内孪晶马氏体区和位错板条马氏体区。
They are dislocated lath martensite area and twinned martensite area respectively.
孪晶结构的形成依靠堆垛层错的滑移运动而形核和扩展。
The formation of twin structure depends on the slip of stacking fault for nucleating and extending.
方程的两类解分别代表表面马氏体和孪晶马氏体的形核。
Two kinds of solutions are obtained, which represent the nucleation of surface and twin martensites respectively.
杂质原子诱发成对孪晶及单孪晶的的可能性各为50%。
Both of the formation possibility of the coupled twins and single twin induced by impurity atom are 50%.
指出，孪晶位错是再结晶过程中，孪晶界面迁移的激活台阶。
It is showed that twin dislocation is the activated step of the migration of twin-plane boundary during recrystallization.
研究人员发现一类被称作共格孪晶界（CTB）的特殊的晶界。
The researchers observed that a specific type of boundary called a coherent twin boundary (CTB) has a double role in fracture mechanism.
主要是位错在大孪晶中易于移动，从而造成强度下降，塑性提高。
It is mainly because that dislocation slides easily within large twin crystal, which leads to the decrease of strength and the increase in plasticity.
利用光学显微镜对中碳钢退火孪晶的形态及形成机制进行了研究。
Morphology and forming mechanism of annealing twin in medium carbon steels have been studied with optical microscope.
并采用六方晶系孪晶面的变换矩阵对孪晶电子衍射花样进行了标定。
The selected area electron diffraction (SAED) pattern of the twin was indexed by transforming matrix of hexagon crystal twin plan.
孪晶和位错运动是纳米银在超高压冲压波作用下形变的两个重要特征。
Twins and dislocation movement are two important deformation characteristics of silver nano powder under high pressure shock wave.
两叶片的结合部位类似于孪晶界，不是两个马氏体片相遇的接触部位。
The joining plane of two plates is like the twin boundary, but it is not a bond plane for the two martensite plates to meet with each other.
问题和失误：错误的空间群：原子类型分配(电子是蓝色的)，无序，孪晶。
Problems and Pitfalls: Wrong Space Group, Atom Type Assignment (all Electrons are Blue), Disorder, Twinning.
透辉石有两个方向的完全解理，通常为孪晶生成，短且成圆柱形，断口参差不平。
Diopside crystals have a perfect cleavage in two directions, are often twinned and are short and columnar, but with an uneven fracture.
金属和合金中的面缺陷包括晶界、亚晶界、孪晶界、相界、堆垛层错、外表面等。
The plane defects of metals and alloys include grain boundary, sub-grain boundary, twins grain boundary, phase boundary, stacking fault, outward surface, etc.
熔化区和固态相变区硬化相组织极为细小，马氏体呈微细针状，具有孪晶亚结构。
It is found that the structure of the hardened phase in melting and transformation zone is very tiny, the martensite appears to be tiny acicular and possesses twin substructure.
观察到高应变率时应力平台与硬化阶段的TEM组织形貌分别为孪晶与断续的马氏体。
TEM morphology of the twin specimens at stress plateau stage and martensite section at hardening stage has been observed.
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