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Processability of Bulk Metallic Glasses

机译:大块金属玻璃的可加工性

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Microfluidic Shear Flow Instabilities in Injection Molded Glassy Metal are investigated. The formation of microfluidic shear flows instabilities involving the presence of different viscosities fluids has been observed in injection molded Bulk Metallic Glasses. The complex rheology of injection molded metastable glassy metal, which has been hypothesized to induce selective clustering of atoms of different steric hindrance, is discussed. Smaller Be, Cu and Ni atomsmay differently rearrange themselves in the bulk metal glassy super cooled liquids forming flow streams of lower viscosity. Segregation of atoms of different size could activate a variety of viscous flow instabilities such as folding and swirling. FEI Scios Dual-Beam Electron scanning and optical microscopy observations of a commercial liquid metal alloy (Zr_(44)Ti_(11)Cu_(10)Be_(25)) have been carried out. We discussed the influence of short-range order clusters distribution and its effect in locally induced shear flow instability and corrosion resistance.
机译:研究了注射成型玻璃态金属中的微流体剪切流动不稳定性。在注模大块金属玻璃中已经观察到微流体剪切流不稳定性的形成,涉及不同粘度流体的存在。讨论了注塑亚稳态玻璃态金属的复杂流变学,该流变学被假定为诱导不同空间位阻的原子的选择性聚集。较小的Be,Cu和Ni原子在块状金属玻璃状过冷液体中可能会不同地重排,从而形成较低粘度的流。不同大小原子的分离会激活各种粘性流动不稳定性,例如折叠和涡旋。已对商用液态金属合金(Zr_(44)Ti_(11)Cu_(10)Be_(25))进行了FEI Scios双电子束电子扫描和光学显微镜观察。我们讨论了短程团簇分布的影响及其在局部引起的剪切流不稳定性和耐蚀性中的作用。

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