Preparation of a Rolled Thin Sheet from a Molybdenum Single Crystal while Maintaining a Single-Crystal Structure

Manufacturing foundations for maintaining a single-crystal structure in rolled thin sheets (0.5 mm thick) prepared from a high-purity [110] molybdenum single crystal grown by electron-beam zone melting are reported. The sheets are manufactured from plate workpieces cut from the single crystal using cold rolling (350°C); a reduction per pass of 5, 10, and 15% to a total strain of 50–75%; and intermediate and final annealing. The maximum scatter of the [001] orientation in the rolled sheets is 3.42°; after final annealing, it is 2.64°. The substructure is studied, and the microhardnesses of the single-crystal plate workpieces (≈177 HV0.5), the final-thickness rolled sheets (≈199 HV0.5), and the sheets subjected to final annealing (≈190 HV0.5) are estimated.