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This study evaluated the microstructure and enhancement of the mechanical properties of a cross-roll rolled Ni­10Cr alloy, as compared to a conventionally rolled material. A thickness reduction of 90% was achieved by cold rolling the alloy, which was subsequently annealed at 700°C for 30min to obtain the fully recrystallized microstructure. In particular, cross roll rolling (CRR) was carried out with a roll mill tilted at a 5° from the transverse direction in the RD­TD plane. After rolling, the electron back-scattering diffraction technique was introduced to investigate the grain boundary characteristic distributions of annealed materials. There was notable grain refinement in the Ni­10Cr alloy as a result of cross roll rolling. Consequently, the average grain size was refined from 135µm in the initial material to 4.2µm in the cross-roll rolled material. This refined grain size led to enhanced mechanical properties, such as yield and tensile strengths. Furthermore, the h111i // ND texture in the CRR material was better developed than that in the conventionally rolled material, contributing to enhancement of the mechanical properties and formability. [doi:10.2320/matertrans.M2011392]

Enhanced Mechanical Properties and Formability of Cross-Roll Rolled Ni&ndash;10Cr Alloy

Enhanced Mechanical Properties and Formability of Cross-Roll Rolled Ni–10Cr Alloy