Processing of bulk metallic glasses with high strength and large compressive plasticity in Cu50Zr50
Processing of bulk metallic glasses with high strength and large compressive plasticity in Cu50Zr50
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DOI：
10.1016/j.scriptamat.2005.11.063
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发表时间：
2006-03
影响因子：
6
通讯作者：
Zede Zhu;H. Zhang;Wen Sun;B. Ding;Zushu Hu
中科院分区：
文献类型：
--
作者：
Zede Zhu;H. Zhang;Wen Sun;B. Ding;Zushu Hu
采用铜模注射铸造法在二元Cu 50 Zr 50合金中成功地制备了直径为1.5mm的全金属非晶棒材。采用X射线衍射、差示扫描量热法和高分辨透射电子显微镜对样品进行了表征。室温单轴压缩试验的杨氏模量、断裂强度和总应变屈服值分别约为88 GPa、2550 MPa和11.7%。从应力-应变曲线也观察到显著的加工硬化。高分辨透射电镜研究表明，1-2nm尺度的中程有序化被认为是负责高强度，显着的加工硬化和大的塑性样品。
Fully metallic glassy rods of 1.5mm diameter were successfully prepared in binary Cu50Zr50alloy by copper mould injection casting method. The samples were characterized by X-ray diffraction, differential scanning calorimetry and high-resolution transmission electron microscopy (HRTEM). Room temperature uniaxial compression tests for the Young’s modulus, fracture strength and total strain yield values of about 88GPa, 2550MPa and 11.7%, respectively. Significant work hardening is also observed from the stress–strain curves. The 1–2nm scale medium-range ordering revealed by HRTEM investigations is thought to be responsible for the high strength, significant work hardening and large plasticity of the samples.