ժҪ Abstract: The mechanical properties, thermodynamic features and their correlation were studied for La�CCe�CNi�CCu�CAl high-entropy bulk metallic glasses (HE-BMGs). Compressive testing indicated that the HE-BMGs are ductile on a microscopic scale but brittle on a macroscopic scale, because of the low fragility index m of the HE-BMGs. In the non-isothermal process, the activation energies for glass transition for these HE-BMGs are the lowest of the known HE-BMGs. Large values of the Avrami exponent n imply that the crystallization process proceeded through three-dimensional growth and with an increasing nucleation rate. The activation energy for glass transition (Eg) is almost proportional to the HE-BMG fracture strength, because a higher Eg is required to dislodge the molecules from the glassy con.guration for the HE-BMGs with a high strength. The .ndings provide unambiguous evidence for the correlation between the mechanical and thermodynamic properties.
Abstract��Abstract: The mechanical properties, thermodynamic features and their correlation were studied for La�CCe�CNi�CCu�CAl high-entropy bulk metallic glasses (HE-BMGs). Compressive testing indicated that the HE-BMGs are ductile on a microscopic scale but brittle on a macroscopic scale, because of the low fragility index m of the HE-BMGs. In the non-isothermal process, the activation energies for glass transition for these HE-BMGs are the lowest of the known HE-BMGs. Large values of the Avrami exponent n imply that the crystallization process proceeded through three-dimensional growth and with an increasing nucleation rate. The activation energy for glass transition (Eg) is almost proportional to the HE-BMG fracture strength, because a higher Eg is required to dislodge the molecules from the glassy con.guration for the HE-BMGs with a high strength. The .ndings provide unambiguous evidence for the correlation between the mechanical and thermodynamic properties.
Lin Wu . Yong Zhao . Jun-jun Li . Ji-li Wu . Bo Zhang. Correlation between mechanical and thermodynamic properties for La�CCe�CNi�CCu�CAl high-entropy metallic glasses[J].Journal of Iron and Steel Research International, 2018, 25(6): 658-665.
Lin Wu . Yong Zhao . Jun-jun Li . Ji-li Wu . Bo Zhang. Correlation between mechanical and thermodynamic properties for La�CCe�CNi�CCu�CAl high-entropy metallic glasses. , 2018, 25(6): 658-665.
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