Molybdenum and its alloys are known for their superior strength among body-centered cubic materials. However, their widespread application is hindered by a significant decrease in ductility at lower temperatures. In this study, we demonstrate the achievement of exceptional ductility in a Mo alloy containing rare-earth La₂O₃ nanoparticles through rotary-swaging, a rarity in Mo-based materials. Our analysis reveals that the large ductility originates from substantial variations in the electronic density of states, a characteristic intrinsic to rare-earth elements. This characteristic can accelerate the generation of oxygen vacancies, facilitating the amorphization of the oxide-matrix interface. This process promotes vacancy absorption and modification of dislocation configurations. Furthermore, by inducing irregular shapes in the La₂O₃ nanoparticles through rotary-swaging, incoming dislocations interact with them, creating multiple dislocation sources near the interface. These dislocation sources act as potent initiators at even reduced temperatures, fostering diverse dislocation types and intricate networks, ultimately enhancing dislocation plasticity.

钼及其合金在体心立方材料中以其卓越的强度而闻名。然而，它们的广泛应用受到低温下延展性显着降低的阻碍。在这项研究中，我们证明了通过旋转模锻，含有稀土 La ₂ O ₃纳米粒子的 Mo 合金实现了卓越的延展性，这在 Mo 基材料中很罕见。我们的分析表明，大的延展性源于电子态密度的巨大变化，这是稀土元素固有的特征。这一特性可以加速氧空位的产生，促进氧化物-基体界面的非晶化。该过程促进了空位吸收和位错构型的改变。此外，通过旋转模锻在 La ₂ O ₃纳米粒子中引入不规则形状，传入的位错与它们相互作用，在界面附近产生多个位错源。这些位错源在甚至降低的温度下充当有效的引发剂，促进不同的位错类型和复杂的网络，最终增强位错的可塑性。