摘要
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 Cu Zn 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.
基金
financial support by the National Natural Science Foundation of China(Nos.U1608257 and 51931010)
the Key Research Program of Frontier Science and International Partnership Program(No.GJHZ2029)
CAS,Liao Ning Revitalization Talents Program(No.XLYC1802026)
financial support by the National Natural Science Foundatiosn of China(No.52001312)
the Project Funded by China Postdoctoral Science Foundation(Nos.BX20190336 and 2019M661150)
the Open Research Fund from the State Key Laboratory of Rolling and Automation,Northeastern University(No.2018RALKFKT002)。
