Recrystallization and grain growth behaviors of 316L stainless steel wires with a diameter of 12 µm were investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy (TEM), and X-ray diffraction techniques. Heavily cold-drawn wires were isothermally held at temperatures from 1073 K to 1223 K (800 °C to 950 °C) for various holding times. Optical microscopy and TEM observations showed that recrystallization grains have irregular shape and that twins exist. The texture formed during drawing and annealing processes of the wires, as measured by X-ray methods, showed a fiber texture approximated by a 〈111〉 and a 〈100〉 component. The value of the grain growth exponent n was calculated, and the kinetic rates were plotted using the Arrhenius equation. Results show that the activation energy of the grain growth for 316L stainless steel wire was determined to be 407 kJ/mol, which was much higher than that of the bulk 316L stainless steel. The small wire diameter and the existence of texture played important roles in the increase of the activation energy for grain growth of the wire.
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JEOL-2100 is a trademark of Japan Electron Optics Ltd., Tokyo.
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This work was supported by the National Natural Science Foundation of China (Grant No. 51134003).
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Manuscript submitted December 25, 2013.
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Zhao, X., Liu, Y., Wang, Y. et al. Recrystallization and Grain Growth of 316L Stainless Steel Wires. Metall Mater Trans A 45, 3446–3453 (2014). https://doi.org/10.1007/s11661-014-2305-2
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DOI: https://doi.org/10.1007/s11661-014-2305-2