Heterogeneous lamellar structure materials have attracted extensive attention due to their exceptional strength and ductility. In this study, Y element was introduced into CuCrZr alloys to adjust the liquid phase formation temperature of the CuZrY phase during the solution annealing process. By employing cold rolling deformation prior to annealing to elongate the grains, the liquid phase was promoted to wet the elongated grain boundaries during the annealing process, ultimately forming lamellar CuZrY heterostructures distributed along the grain boundaries. The heterogeneous lamellar structure, the grain boundary distribution characteristics, and the effect of Y on stacking fault energy enhanced the hetero-deformation induced working hardening, thereby improving both the strength and ductility of the CuCrZrY alloy. Besides, the investigated CuCrZrY alloy achieved an excellent combination of tensile strength, uniform elongation, electrical conductivity and thermal conductivity, with values of 527 MPa, 10.66%, 83% IACS and 335.5 W/(m·K), respectively. Therefore, the method of controlling liquid phase temperature through composition adjustment and liquid phase infiltration path through grain deformation offers new possibilities for the design of heterogeneous lamellar structure materials.

中文翻译：

---

通过晶界上的层状异质结构提高 CuCrZr 高导电合金的强度和延展性


异质层状结构材料因其卓越的强度和延展性而受到广泛关注。在本研究中，在 CuCrZr 合金中引入 Y 元素，以调节固溶退火过程中 CuZrY 相的液相形成温度。通过在退火前采用冷轧变形来拉长晶粒，在退火过程中促进液相润湿拉长的晶界，最终形成沿晶界分布的层状 CuZrY 异质结构。非均质层状结构、晶界分布特征以及 Y 对堆叠故障能量的影响增强了异质变形诱导的加工硬化，从而提高了 CuCrZrY 合金的强度和延展性。此外，所研究的CuCrZrY合金实现了抗拉强度、均匀伸长率、导电性和导热性的优异组合，分别为527 MPa、10.66%、83% IACS和335.5 W/（m·K）。因此，通过成分调节控制液相温度和通过晶粒变形控制液相渗透路径的方法为非均相层状结构材料的设计提供了新的可能性。