Hot Deformation Behavior of Cu–9.83Ni–1.24Fe–0.7Mn–0.012Ce Alloy for Seawater Pipelines

The flow stress of a Cu–9.83Ni–1.24Fe–0.7Mn–0.012Ce alloy at high temperature is studied by using a thermo‐simulation machine. The microstructure is characterized by optical microscopy and transmission electron microscopy. The flow stress and strain increase linearly in the initial stages of hot deformation, and two trends exist after the linear section. When the strain rate exceeds 0.1 s⁻¹, the flow stress continues to increase with an increase in deformation. When the strain rate is less than 0.1 s⁻¹, steady‐state flow results. A thermal‐processing map of the alloy is established based on the dynamic material model. The destabilization zone of the alloy is established for 800–870 °C and a strain rate of 0.1–10 s⁻¹. Subgrains are formed by dynamic recovery with high‐density dislocations. The deformation temperature range of safe processing I zone is 800–900 °C with a strain rate of 0.01–0.1 s⁻¹; and the deformation temperature range of safe processing zone II is 900–1000 °C with a strain rate of 0.01–10 s⁻¹. The softening mechanism of recrystallization is conducive to thermal processing.