Recrystallization and grain growth of cold-rolled gold sheet |
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Authors: | Jae-Hyung Cho H -P Ha K H Oh |
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Affiliation: | (1) the Sibley School of Mechanical and Aerospace Engineering, Cornell University, 14853 Ithaca, NY;(2) the Metal Processing Center, Korea Institute of Science & Technology, 130-650 Seoul, Korea;(3) the School of Materials Science & Engineering, College of Engineering, Seoul National University, 151-744 Seoul, Korea |
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Abstract: | Recrystallization and grain growth of a cold-rolled gold sheet with 98 pct reduction in area (RA) were investigated with electron
backscatter diffraction (EBSD) and X-ray diffraction (XRD). Gold with some dopants (Be, Ca, and La) was used in this research
and its recrystallization temperature was 320 °C. Isothermal annealing experiments at 400 °C, 500 °C, and 600 °C were carried
out for the cold-rolled gold sheet, and recrystallization texture was examined. In the cold-rolled gold sheet, α- and β-fibers were measured mainly and some shear texture components were found on the surface. Shear texture components remained
on the surface for 2 hours at 400 °C and were consumed by other recrystallized grains after 24 hours at 400 °C. Microstructure
and texture evolution during in-situ annealing at 400 °C were investigated from the cold-rolled state to the fully recrystallized state using EBSD. Most of the
newly, recrystallized grains came from the deformed β-fiber regions and consisted of β-fiber, cube, and other random orientations. |
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