twin crystal

基本解释

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。
In this paper the morphology of the ferrite twin deformation, the conditions of a thick twin crystal formation, and the various factors to decide the quantity of twins produced are analyzed.
用扫描电镜观察铁素体形变孪晶的形态，对厚片孪晶的形成条件及决定孪晶数量的各种因素进行分析。

Also on display at the booth will be the entire SuperTooth collection of speakers (DISCO TWIN, Disco2 and Disco), hands-free car kits (HD-VOICE, Crystal and HD), and recently introduced Melody headphone.
ENGADGET: SuperTooth launches the $199 Disco Twin and $89 HD Voice at CES (video)