Reversible structural relaxation and crystallization of Zr62Al8Ni13Cu17 bulk metallic glass |
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| Affiliation: | 1. International Center for New-Structured Materials (ICNSM) and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China;2. Department of Materials Science and Metallurgy, Kyungpook National University, Daegu 702-701, Republic of Korea |
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| Abstract: | The effect of pre-treatment above glass transition temperature (Tg) on the reversible structural relaxation in a Zr62Al8Ni13Cu17 bulk metallic glass at sub-Tg annealing has been investigated. It is found that the enthalpy relaxation can be well described by a stretched exponential function. A free-volume model can only qualitatively simulate the process of enthalpy recovery. Sub-Tg heat treatments after enthalpy recovery have almost no effect on the following crystallization, which can be accelerated when critical clusters are formed for a longer time annealing. |
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