25SiC 关键字: 复合材料； 超塑性； 位错； 晶界； 层错；孪晶[gap=1164]s: composites; superplasticity; dislocation; boundary of grain; stacking faults; twin crystal
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twin-crystal 双晶
crystal twin [晶体] 双晶 ; 孪晶
twin-crystal probe 双晶探头
It is mainly because that dislocation slides easily within large twin crystal, which leads to the decrease of strength and the increase in plasticity.
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。
At the time of deformation reached 40%, the appearance of the crystal changed greatly: the size refined, boundary turned clear, second phase disappeared and twin crystal structure appeared.
变形量为40%时，轧板的晶粒形貌发生了显著变化，晶粒变得细小，晶界清晰，第二相完全消失，并出现孪晶组织。
The selected area electron diffraction (SAED) pattern of the twin was indexed by transforming matrix of hexagon crystal twin plan.
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。
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