Abstract

The change in the spectra of elastically and discretely scattered electrons in Ti–6Al–4V alloy subjected to radial shear rolling at T = 1000°C was studied in comparison with the initial state. Interatomic bonds in the equilibrium α phase of the alloy are formed by Al sp electrons, and their contribution is small. Quenching after radial shear rolling at T = 1000°C causes the formation of a nonequilibrium αʹ phase in the α phase. The resulting αʹ phase contains vanadium atoms whose d electrons are part of the interatomic bond. As a result, the α phase is strengthened and the low-temperature toughness of the alloy is enhanced. At the same time, sp electrons are strongly scattered by vanadium ions and therefore their contribution to the interatomic bond is weakened. This generates localized plastic flows in the lattice curvature zones, which develop in the field of Coulomb repulsion of electrons and govern a high relaxation ability of the alloy at low temperatures. Very high strengthening is found to be fundamentally related to a very high relaxation factor. The results are explained by the effect of structural transformation.

中文翻译：

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在 1000°С 温度下径向剪切轧制后 Ti-6Al-4V 合金断裂表面的弹性和离散散射电子的电子能谱

摘要

与初始状态相比，研​​究了在T = 1000°C 下进行径向剪切轧制的 Ti-6Al-4V 合金中弹性和离散散射电子光谱的变化。合金的平衡α相中的原子间键是由Al sp电子形成的，它们的贡献很小。T处径向剪切轧制后的淬火= 1000°C 导致在 α 相中形成非平衡 αʹ 相。生成的 αʹ 相含有钒原子，其 d 电子是原子间键的一部分。结果，α相被强化，合金的低温韧性增强。同时，sp电子被钒离子强烈散射，因此它们对原子间键的贡献减弱。这会在晶格曲率区产生局部塑性流动，在电子库仑排斥场中产生并控制合金在低温下的高弛豫能力。发现非常高的强化基本上与非常高的松弛因子有关。结果由结构转变的影响来解释。