材料科学
过冷
非晶态金属
变形(气象学)
应变率
牛顿流体
无定形固体
延展性(地球科学)
同种类的
可塑性
复合材料
热力学
结晶学
合金
蠕动
化学
物理
作者
T.G. Nieh,J. Wadsworth
标识
DOI:10.1016/j.scriptamat.2005.04.052
摘要
Homogeneous deformation of bulk metallic glasses (BMGs) is reviewed. Homogeneous deformation usually takes place at temperatures near and above the glass transition temperature. The deformation behavior depends upon strain rate. At low strain rates, BMGs behave like a Newtonian fluid (m = 1) but plastic flow becomes non-Newtonian at high strain rates. The non-Newtonian behavior is a result of microstructural instability, namely, the concurrent formation of nanocrystals in the amorphous matrix during deformation. Despite the difference in deformation behavior, BMGs usually show large ductility (over 300%) at temperatures in the supercooled liquid region.
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