To clarify the work hardening discrepancy effect on the strengthening of laminated metals, we designed two laminated Cu/Cu4Zn and Cu/Cu32Zn samples with different layer thicknesses. Cu/Cu4Zn has larger work hardening discrepancy between two constituent layers relative to Cu/Cu32Zn, but the yield strengths of two CuZn constituents are comparable. Uniaxial tensile results suggest Cu/Cu4Zn with larger work hardening discrepancy exhibits a significant strengthening at early deformation stage while Cu/Cu32Zn possesses a better ductility. The underlying mechanisms for the strengthening effect are attributed to more geometrically necessary dislocations accumulated at interfaces and severer strain localization due to the larger work hardening discrepancy.

为了阐明加工硬化差异对层压金属强化的影响，我们设计了两种不同层厚的层压 Cu/Cu4Zn 和 Cu/Cu32Zn 样品。相对于 Cu/Cu32Zn，Cu/Cu4Zn 在两个组成层之间具有更大的加工硬化差异，但两个 CuZn 组分的屈服强度相当。单轴拉伸结果表明，具有较大加工硬化差异的 Cu/Cu4Zn 在早期变形阶段表现出显着的强化，而 Cu/Cu32Zn 具有更好的延展性。强化效应的潜在机制归因于在界面处积累的更多几何必要位错和更大的加工硬化差异导致的更严重的应变局部化。