Monolayer coarsening of precursor IMCs: interfacial evolution and bond strength of Cu/Al composite sheets
Source abstract
Abstract
Annealing treatment is essential to eliminate work hardening and regulate peel strength of Cu/Al composite sheets prepared via the casting and cold rolling process. In this study, the interfacial microstructure evolution and peeling behavior of these composite sheets were systematically investigated using SEM, EBSD, TEM, and peel tests. The results indicate that: (1) the as-rolled composite sheet exhibited the highest initial peel strength, and the interfacial fracture mode transitioned from ductile Al-adhesion tearing to brittle intermetallic compound (IMC) layer tearing with increasing annealing temperature; (2) the thickening of the interfacial IMCs followed a distinct monolayer coarsening mechanism, characterized by each phase layer developing as a single layer of columnar grains arranged parallel to the interface; (3) a quantitative predictive model correlating annealing temperature with peel strength was established based on IMC growth kinetics and fracture mechanisms, showing consistency with independent experimental results from the literature. This work provides a theoretical basis for the optimization of heat treatment processes and property prediction of industrial Cu/Al composite sheets.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Microstructure and mechanical properties · Advanced Welding Techniques Analysis · Nanoporous metals and alloys
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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