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[求助]
Grain boundary shear
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看一篇綜述 里面有一段話如下: With decreasing crystalline size from the range of micrometers down to few tens of nanometers,the strength and hardness of a material increases due to decreasing dislocation activity inside the crystallites(Hall-Petch effect)until a maximum strength is achieved at a size of about 10-20nm because ,with fourther decrease in the crystlline size,the grain boundary shear (also called "sliding" dominates due to a strong increase in the volume fraction of the easily shearing garin boundary material.前面很好理解就是Hall-Petch效應,晶粒細化引起強度增加。但后面說如果晶粒繼續(xù)細化則grain boundary shear 主宰,grain boundary shear 直譯是“晶界剪切”但后面括號里又說被稱作滑移,到底該如何理解呢?誰能具體說下,感激不盡! |
可能會用到的中文教材 |
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