Strain hardening and recovery in a bulk metallic glass under nanoindentation
Strain hardening and recovery in a bulk metallic glass under nanoindentation
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DOI：
10.1016/j.scriptamat.2005.12.049
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发表时间：
2006-04
影响因子：
6
通讯作者：
Bing Yang;L. Riester;T. Nieh;T. Nieh
中科院分区：
文献类型：
--
作者：
Bing Yang;L. Riester;T. Nieh;T. Nieh
利用纳米压痕仪在块体金属玻璃（BMG）中观察到了非晶材料在室温下未发现的硬化和回复现象。从设计的循环实验中，我们观察到的硬度的BMG增加每次当样品卸载后立即重新加载，然后逐渐降低到一个稳定的值之前，下一个卸载。用非晶结构的自由体积模型解释了这一现象。
Hardening and recovery phenomena, which have not been recognized in amorphous materials at room temperature before, were observed in a bulk metallic glass (BMG) using an instrumented nanoindentation. From designed cyclic experiments, we observed the hardness of the BMG increased each time when the sample was reloaded immediately after unloading and then gradually reduced to a stable value before the next unloading. This phenomenon was explained using a free-volume model for amorphous structure.