Malleable hypoeutectic Zr–Ni–Cu–Al bulk glassy alloys with tensile plastic elongation at room temperature
Malleable hypoeutectic Zr–Ni–Cu–Al bulk glassy alloys with tensile plastic elongation at room temperature
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DOI：
10.1080/09500830902873575
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发表时间：
2009-04
影响因子：
1.2
通讯作者：
Y. Yokoyama;K. Fujita;A. Yavari;A. Inoue
中科院分区：
文献类型：
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作者：
Y. Yokoyama;K. Fujita;A. Yavari;A. Inoue
在亚共晶Zr-Ni-Cu-Al合金系中研制了一种室温拉伸塑性变形的新型块体非晶合金。亚共晶Zr-Ni-Cu-Al BGA显示出高泊松比、低杨氏模量，并且在压缩时具有高延展性。它表现出的泊松比为0.39，杨氏模量为73 GPa，和一个明显的拉伸塑性伸长率约1.7%，在室温下与颈缩由于许多剪切带的操作。的拉伸塑性变形能力似乎起源于修改的玻璃结构与亚共晶组合物中的Zr-Zr原子对的数量的增加。
A new bulk glassy alloy (BGA) showing macroscopic tensile plastic elongation at room temperature has been developed in the hypoeutectic Zr–Ni–Cu–Al alloy system. The hypoeutectic Zr–Ni–Cu–Al BGA shows a high Poisson's ratio, a low Young's modulus, and is highly malleable in compression. It exhibits a Poisson's ratio of 0.39, a Young's modulus of 73 GPa, and a distinct tensile plastic elongation of about 1.7% at room temperature with necking due to the operation of many shear bands. The tensile plastic deformability seems to originate from modifications of the glass structure with increasing the number of Zr–Zr atomic pairs in the hypoeutectic composition.