The glass-forming ability and die casting performance of Zr-based bulk metallic glasses [Zr基块体非晶合金玻璃形成能力与压铸成型性能研究]

作者：Wang H.; Chen S.; Hu Q.; Deng X.; Zou J.; Xie S.; Qian H.; Zeng X.^*

来源：Materials Science and Technology, 2020, 28(5): 38-46.

DOI：10.11951/j.issn.1005-0299.20200089

• Die casting performance
• Glass-forming ability
• Precision structural parts
• Zr-based bulk metallic glass

In this study, the effects of the melt temperature, casting pressure and chemical composition on the glass-forming ability (GFA) and die casting performance of metallic glasses were investigated, and the relationship between those two properties were further explored. It was found that the GFA of Zr-based metallic glasses initially slightly increased and then decreased with increasing melt temperature. Moreover, the GFA and stability of metallic glasses vary considerably due to chemical inhomogeneity, local atomic clusters, as well as actual cooling rate. The casting performance of metallic glasses improved with increasing of melt temperature and casting pressure, but showing mutual restriction with the GFA. Once the alloy has a strong GFA, the dense atomic clusters and larger viscosity coefficient can dramatically hinder the flow forming of the supercooled liquids, especially for the alloys with high thermal stability. However, the overheating of the melt would cause weak GFA and decreased viscosity, and so enhance die casting performance. Therefore, choosing appropriate compositions and optimizing casting parameters facilitate precision forming of structural parts.

• 单位
  安徽大学