# Tensile Properties of Cryorolled Cu/Al Clad Sheet with an SUS304 Interlayer after Annealing at Various Temperatures

## TL;DR

This study explores how cryorolling and annealing affect the strength and flexibility of copper-aluminum sheets with a stainless steel layer.

## Contribution

The paper introduces cryorolling and annealing as a new method to enhance the tensile properties of Cu/Al clad sheets.

## Key findings

- Cryorolled Cu/Al clad sheets achieve a tensile strength of 302 MPa.
- Annealing reduces tensile strength to 159 MPa but increases elongation to 29.0%.
- Cryorolled samples show 13.1% higher tensile strength than hot-rolled samples.

## Abstract

This paper investigates the tensile properties and microstructures of Cu/Al clad sheets with an SUS304 interlayer after cryorolling and subsequent annealing and compares them with hot-rolled samples. The experimental results show that the inhibition of dynamic recovery by cryorolling enables the Cu/Al clad sheets to achieve a tensile strength of 302 MPa. After annealing, the tensile strength sharply drops to 159 MPa, while the elongation recovers to 29.0%. Compared with hot-rolled samples, the tensile strength of cryorolled samples is increased by 13.1% due to the effect of fine-grain strengthening. During the annealing process, the cryorolled samples exhibit improved elongation under a comparable strength with the hot-rolled samples, profiting from the higher degree of recrystallization and a higher proportion of annealing twins. The tensile properties of Cu/Al clad sheet with an SUS304 interlayer are strengthened by cryorolling and subsequent annealing, providing a new method for the fabrication of high-performance Cu/Al clad sheets.