High temperature deformation of a Cu40Zr44Ag8Al8 bulk metallic glass
High temperature deformation of a Cu40Zr44Ag8Al8 bulk metallic glass
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Cu40Zr44Ag8Al8块体金属玻璃的高温变形
DOI：
10.1016/j.msea.2011.01.045
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发表时间：
2011-04
期刊：
影响因子：
6.4
通讯作者：
Michel Suery
中科院分区：
文献类型：
--
作者：
Yong Liu;J.J. Bl;in;G. Kapelski,;Michel Suery
研究了Cu40Zr44Ag8Al8块体非晶合金在过冷液相区的压缩变形行为。应变速率跳跃进行了各种温度范围从约Tg到Tg +20 K。结果表明，该合金在最高温度下表现为准牛顿流动，随着温度的降低和应变速率的增加，合金向非牛顿流动转变。在自由体积模型的框架下分析了其力学行为。在Tg +20K下变形后，通过XRD对材料进行了表征，并与相同材料简单地在高温下保持相同时间进行了比较。据观察，变形略微加速结晶，这导致应力-应变曲线上非常重要的硬化。然而，即使在高温下没有硬化，这表明没有发生结晶，在室温下也观察到一些硬化，即使在高温下保持短时间。
The deformation behavior of a Cu40Zr44Ag8Al8bulk metallic glass in its supercooled liquid region was investigated in compression. Strain rate jumps were carried out at various temperatures ranging from about Tgto Tg+20K. The results show that the alloy exhibits quasi-Newtonian behavior at the highest temperature with a transition to non Newtonian flow when temperature decreases and strain rate increases. The mechanical behavior has been analyzed in the framework of the free volume model. The material has been characterized after deformation at Tg+20K by XRD and comparison has been made with the same material simply held at high temperature for the same duration. It was observed that deformation slightly accelerates crystallization which results in a very important hardening on the stress–strain curve. However, even if there is no hardening at high temperature which suggests that no crystallization has occurred, some hardening is observed at room temperature even for short holding times at high temperature.
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影响因子：
6.2
作者：
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通讯作者：
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影响因子：
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作者：
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DOI：
10.1007/s11661-009-0087-8
发表时间：
2010-07-01
影响因子：
2.8
作者：
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通讯作者：
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影响因子：
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作者：
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