Mechanical response of the constrained nanostructured layer in heterogeneous laminate

A B S T R A C T Understanding the inter-zone interaction-dependent mechanical behavior of constituent zones in het-erostructured material is fundamental but challenging. Here we report quantitative investigations on the mechanical response of a nanostructured Cu-10Zn layer constrained by coarse-grained Cu layers in a lam-inate. The nanostructure layer displays large uniform elongation, moderate work hardening but gradually reduced engineering stress. Such unique responses are primarily attributed to the inter-layer constraint, which leads to the formation of dispersed stable strain bands and thus enables extensive activation of mechanical twinning and stacking faults. These findings provide new insights into the deformation and load-bearing mechanisms of heterostructures. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Automated summary

This study quantitatively investigates the mechanical response of a nanostructured Cu-10Zn layer constrained by coarse-grained Cu layers, revealing unique mechanical behaviors attributed to inter-layer constraint. The nanostructured layer displays large uniform elongation, moderate work hardening, and gradually reduced engineering stress, mainly due to the dispersed stable strain bands formed by the inter-layer constraint, enabling extensive activation of mechanical twinning and stacking faults. These findings provide new insights into the deformation and load-bearing mechanisms of heterostructures.