Abnormal Grain Refinement and Synergistic Enhancement of Strength and Plasticity of High-Purity Nickel via Cycle Skin-Pass Rolling Deformation

Effect of 1 pct (cycle skin-pass rolling) and 10 pct (conventional rolling) reduction ratio per pass on the microstructure evolution and mechanical properties of high-purity nickel was investigated. Cycle skin-pass rolling produces greater grain refinement, higher strength and elongation than conventional rolling. A high dislocation strengthening, particularly statistical storage dislocations, contributes to higher strength. The large dislocation cell structure and low intracellular dislocation density contribute to its high capacity for strain hardening, resulting in excellent elongation. [GRAPHICS] .

Automated summary

The effect of 1 pct and 10 pct reduction ratios per pass on the microstructure and mechanical properties of high-purity nickel was investigated. The study found that cycle skin-pass rolling resulted in finer grains, higher strength, and elongation compared to conventional rolling. This was attributed to the presence of high dislocation strengthening and a particular dislocation cell structure.