Abstract A simplified approach to evaluate the thermoplastic forming ability (TPFA) of metallic glasses is proposed by comprehensive consideration of flow instability and phase stability. We found that primary factors influencing the maximum stress achievable under a Newtonian viscous flow (NVF) condition are the fragility and processing temperature, which identifies the effect of viscosity on the TPFA under mixed NVF and non-NVF conditions. Further, the degree of undercooling from the liquidus melting temperature, which reflects the supercooled liquid stability against thermal and mechanical fluctuations, is suggested as a practical indicator of ideal TPFA under isothermal and NVF conditions in metallic glasses.

中文翻译：

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金属玻璃理想热塑性成型能力的标准

摘要 综合考虑流动不稳定性和相稳定性，提出了一种评估金属玻璃热塑性成形能力（TPFA）的简化方法。我们发现，在牛顿粘性流动 (NVF) 条件下，影响最大应力的主要因素是脆性和加工温度，它们确定了在混合 NVF 和非 NVF 条件下粘度对 TPFA 的影响。此外，液相线熔化温度的过冷度反映了过冷液体对热和机械波动的稳定性，被建议作为金属玻璃中等温和 NVF 条件下理想 TPFA 的实用指标。