Phase separation and significant plastic strain in a Zr–Cu–Ni–Al–Fe bulk metallic glass
Phase separation and significant plastic strain in a Zr–Cu–Ni–Al–Fe bulk metallic glass
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DOI：
10.1016/j.msea.2016.01.032
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发表时间：
2016-02
期刊：
影响因子：
6.4
通讯作者：
Shuangshuang Chen;Jianxin Tu;Jiajia Wu;Q. Hu;S. Xie;J. Zou;Xierong Zeng
中科院分区：
文献类型：
--
作者：
Shuangshuang Chen;Jianxin Tu;Jiajia Wu;Q. Hu;S. Xie;J. Zou;Xierong Zeng
在本研究中，我们报道了一种相分离的大块金属玻璃，它在室温下表现出显著的塑性应变。测得其工程塑性应变约为32.6%，断裂强度约为2919 Mpa，杨氏模数约为90 Gpa。从弹性耗能、分离长度和相间剪切模数差的角度对延性的提高进行了解释。这一结果为通过微合金化进行成分和结构设计来改善大块金属玻璃的力学性能提供了一条很有前途的途径。
In this study, we reported a phase-separated Zr62Cu18Ni10.4Al8Fe1.6bulk metallic glass exhibiting a significant plastic strain at room-temperature. The engineering plastic strain, fracture strength and Young's modulus were determined to be about 32.6%, 2919 MPa and 90 GPa respectively. The enhanced ductility was explained from the view point of elastic energy dissipation, separation length and shear modulus difference between separated phases. This result provides a promising approach to improve the mechanical properties of bulk metallic glasses through compositional and structural design by microalloying.