Abstract Activation of the β relaxation of metallic glasses is usually related to the activation of the structure units which correlates with the activation of shear transformation zones. In the present work, a pronounced slow β relaxation behavior was observed around ambient temperature in (La25Ce75)65Al11Co24 metallic glass. Based on the compression tests at 223 K and 300 K, the results demonstrated that compression achieves large compressive plasticity with true plastic strain over 160% at room temperature, while the compressive plastic strain less than 1% at 223 K. From the perspective of structural heterogeneity, the (La25Ce75)65Al11Co24 metallic glass provides a model alloy to probe the mechanisms of deformation at room temperature induced shear transition behaviors.

中文翻译：

---

LaCe 基块体金属玻璃中的室温激活慢 β 弛豫和大压缩塑性

摘要 金属玻璃β弛豫的激活通常与结构单元的激活有关，而结构单元的激活与剪切转变区的激活相关。在目前的工作中，在 (La25Ce75)65Al11Co24 金属玻璃中在环境温度附近观察到明显的缓慢 β 弛豫行为。基于223 K和300 K的压缩试验结果表明，压缩实现了较大的压缩塑性，室温下真塑性应变超过160%，而223 K下的压缩塑性应变小于1%。非均质性，(La25Ce75)65Al11Co24 金属玻璃提供了一种模型合金来探测室温下引起的剪切转变行为的变形机制。