Annealing and anomalous (bimodal) grain growth of Zr 702

Zirconium’s superior corrosion resistance capabilities have lead to its increasing use in the fabrication of chemical processing equipment and nuclear reactors. The purpose of this study was to find a critical temperature, above which bimodal grain growth takes place, in cold worked sheets after annealing was applied. The critical temperature above which there is abnormal grain growth was 1275 °F (691 °C). Additionally, the abnormal grain growth occurs only after bending and not rolling.