Enhanced tensile plasticity of a CuZr-based bulk metallic glass composite induced by ion irradiation
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第10期
论文作者：Peng Xue Simon Pauly Songshan Jiang Hongbo Fan Zhiliang Ning Yongjiang Huang Jianfei Sun
文章页码：2221 - 2226
摘 要：N+ ion irradiation is utilized to tune the structure and mechanical properties of a Cu48Zr47.2Al4Nb0.8 bulk metallic glass composite（BMGC）. Ion irradiation increases the disorder near the surface, as probed by neutron diffraction, and, moreover, causes the phase transformation from B2Cu Zr to B19’ CuZr martensitic phase in the studied BMGC. The tensile plasticity of the BMGC is dramatically improved after ion irradiation, which results from multiple shear banding on the surface and the martensitic transformation of the B2 to B19’ Cu Zr martensitic phase. The experimental results are strongly corroborated by complementary molecular dynamic simulations.
Peng Xue1,2,3，Simon Pauly3，Songshan Jiang1,2，Hongbo Fan2，Zhiliang Ning2，Yongjiang Huang1,2,5，Jianfei Sun2
1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology2. School of Materials Science and Engineering, Harbin Institute of Technology3. IFW Dresden, Institute for Complex Materials5. Key Laboratory of Micro-systems and Micro-structures Manufacturing (Harbin Institute of Technology),Ministry of Education
摘 要：N+ ion irradiation is utilized to tune the structure and mechanical properties of a Cu48Zr47.2Al4Nb0.8 bulk metallic glass composite（BMGC）. Ion irradiation increases the disorder near the surface, as probed by neutron diffraction, and, moreover, causes the phase transformation from B2Cu Zr to B19’ CuZr martensitic phase in the studied BMGC. The tensile plasticity of the BMGC is dramatically improved after ion irradiation, which results from multiple shear banding on the surface and the martensitic transformation of the B2 to B19’ Cu Zr martensitic phase. The experimental results are strongly corroborated by complementary molecular dynamic simulations.
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