Mechanically driven phase separation and corresponding microhardness change in Cu60Zr20Ti20 bulk metallic glass

Mechanically driven phase separation and corresponding microhardness change in Cu60Zr20Ti20 bulk metallic glass
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Cu60Zr20Ti20 大块金属玻璃中机械驱动的相分离和相应的显微硬度变化

DOI:
10.1063/1.1862329
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发表时间:
2005-02
影响因子:
4
通讯作者:
Jianzhong Jiang
Jianzhong Jiang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Qingping Cao;Jinfu Li;Yaohe Zhou;Jianzhong Jiang

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对Cu60Zr20Ti20块体非晶合金进行了低温轧制变形。试样表现出良好的延展性,并被轧制到97%的厚度减少没有断裂。在变形过程中结晶被抑制,然而,当厚度减少超过89%时,在玻璃基质中观察到相分离。一旦发生相分离,试样的显微硬度急剧增加,表明存在由金属玻璃的剧烈塑性变形引起的加工硬化。
Rolling deformation of bulk Cu60Zr20Ti20 metallic glass has been performed at cryogenic temperature. The specimens exhibit excellent ductility, and are rolled up to 97% reduction in thickness without fracture. Crystallization is suppressed during the deformation, however, phase separation is observed in the glassy matrix when the thickness reduction exceeds 89%. Once the phase separation occurs, the microhardness of the specimen increases drastically, indicating the existence of work hardening by severe plastic deformation of the metallic glass.
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