Abstract To examine the influence of grain boundary engineering (GBE) on the high-temperature mechanical properties of face-centered cubic (FCC) metals, the tensile tests were carried out at 723 K on the non-GBE and GBE Cu-16at.%Al alloy samples. The GBE treatment increases the deformation uniformity and cracking resistance, thus effectively improves the high-temperature ductility. Moreover, the dynamic recrystallization (DRX) of the GBE sample is significantly suppressed due to the reduction of the Gibbs free energy, impeding the high-temperature softening. Therefore, the high-temperature strength and ductility of FCC metals might be synchronously improved by a GBE treatment under the premise that DRX occurs.

中文翻译：

---

通过晶界工程同步提高面心立方金属的高温强度和延展性的可能性

摘要 为了检验晶界工程 (GBE) 对面心立方 (FCC) 金属高温力学性能的影响，对非 GBE 和 GBE Cu-16at.% 进行了 723 K 拉伸试验。铝合金样品。GBE处理增加了变形均匀性和抗裂性，从而有效提高了高温延展性。此外，由于吉布斯自由能的降低，GBE 样品的动态再结晶 (DRX) 受到显着抑制，阻碍了高温软化。因此，在发生DRX的前提下，GBE处理可能会同步提高FCC金属的高温强度和延展性。