Texture and Flexural Fatigue Resistance Governed by Surface-Dependent Deformation and Recrystallization in the Copper Foils.

ABSTRACT: High-flexibility copper foils are critical for reliable flexible interconnects and displays. In this work, commercial-purity copper belts were processed by triple-layer stacked cold rolling to ultrathin foils, producing distinct surface- and layer-dependent deformation structures in the bright, matte, and central-interface layers; subsequent annealing at 600 °C then promoted orientation-selective recrystallization. Under the present conditions, the center-interface layer of the triple-rolled foil achieved the highest flexural-fatigue life (≈8.0 × 10⁴ cycles) within a window of cube ≈ 30-45% and grain size ≈ 40-60 μm. In this regime, grain-size control stabilizes intergranular slip compatibility, reduces elastic-plastic mismatch, and mitigates strain localization during cyclic be

SUBMITTER: Wu T 

PROVIDER: S-EPMC12787428 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature