The temperature and the deformation rate are the key factors to prepare ultra-fine grain materials.
变形温度和变形速率是获得超细晶材料的关键。
Rolled molybdenum plate has a high density, even close to its theoretic value when the deformation rate is higher than 50%.
经过轧制的钨板具有很高的密度，变形率达到50%以上的钨板的密度基本上接近理论密度。
For high rockfill DAMS, the grain crushing in high stress field may raise the deformation rate of dam body and should be considered in numerical calculation.
对于高堆石坝而言，在高应力场作用下堆石颗粒将明显破碎，从而导致坝体变形率增加，因此，在高坝数值计算中必须考虑颗粒破碎的影响。
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