Exploring the phase transition of high entropy alloys (HEAs) with multiple major elements is of great importance for understanding the underlying physical mechanisms. Macroscopic martensitic phase transition has been frequently reported in HEAs, however, nanoscale microstructural phase evolution has not been investigated to the same extent. Herein, we have prepared the Ti₃₃Nb₁₅Zr₂₅Hf₂₅O₂ HEA and investigated the strain glass transition and its associated properties using dynamic mechanical analysis and microstructure characterization. We have found that the elastic modulus in Ti₃₃Nb₁₅Zr₂₅Hf₂₅O₂ HEA deviates from Wachtman's equation and observed the Elinvar effect in the form of temperature-independent modulus in the temperature range from 150 K to 450 K and frequency-dependence modulus around 220 K. The strain glass transition has been evidenced in Ti₃₃Nb₁₅Zr₂₅Hf₂₅O₂ HEA by the formation and growth of nano-sized domains during in-situ transmission electron microscopy (TEM) cooling, and substantiated by the broken ergodicity during zero-field-cooling/field-cooling. The strain glass transition is believed to account for the Elinvar effect, where the modulus hardening of nano-sized domains compensates dynamically with the modulus softening of the transformable matrix.

探索具有多种主要元素的高熵合金（HEA）的相变对于理解潜在的物理机制非常重要。HEA 中的宏观马氏体相变已被频繁报道，然而，纳米级微观结构相演化尚未得到同等程度的研究。在此，我们制备了Ti ₃₃ Nb ₁₅ Zr ₂₅ Hf ₂₅ O ₂ HEA，并利用动态力学分析和微观结构表征研究了应变玻璃化转变及其相关性能。我们发现Ti ₃₃ Nb ₁₅ Zr ₂₅ Hf ₂₅ O的弹性模量₂ HEA 偏离了 Wachtman 方程，在 150 K 至 450 K 温度范围内以与温度无关的模量和 220 K 左右的频率相关模量的形式观察到了 Elinvar 效应。应变玻璃化转变已在 Ti 33 Nb 15_中得到_证实Zr ₂₅ Hf ₂₅ O _{2 HEA 通过}原位纳米尺寸域的形成和生长透射电子显微镜（TEM）冷却，并通过零场冷却/场冷却期间破坏的遍历性得到证实。应变玻璃化转变被认为是埃林瓦尔效应的原因，其中纳米尺寸域的模量硬化与可变形基体的模量软化动态补偿。