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Effect of gadolinium addition on the corrosion, wear, and neutron absorbing behaviors of duplex stainless steel sheet

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Abstract

In order to develop the neutron absorbing and shield materials, a hot-rolled 0.02%-Gd duplex stainless steel was prepared with 55 vol. % of ferrite and 45 vol. % of austenite. The σ phase with an average grain size of 9–11 μm in austenitic (γ) grains tended to be elongated parallel to the rolling direction, with (100) poles concentrated towards the normal direction, and (110) poles located between the normal and radial directions (ND and RD, respectively). Most of the gadolinium existed as sub-micro-meter-sized Gd2O3 and GdCrO3 precipitates. The yield strength, ultimate tensile strength, elongation, and microhardness of the 0.02%-Gd duplex stainless steel were 522.8 MPa, 700.2 MPa, 38.1%, and 258.5–314.7 HV, respectively. The friction coefficient and wear resistance were 3.11 and 0.004 mg/kg/cycle, respectively. The corrosion potential and corrosion rate of the 0.02%-Gd duplex stainless steel were–0.448 V SHE and 1.263 × 10–3 A/cm2 for 1M-HCl,–0.544 V SHE and 2.619 × 10–3 A/cm2 for 1M-NaCl,–0.299 V SHE and 1.469 × 10–3 A/cm2 for 1M-H2SO4, and–0.607 V SHE and 2.295 × 10–3 A/cm2 for synthetic water, respectively. The coefficient of neutron transmission for the 0.02%-Gd duplex stainless steel sheet of 2 mm thickness at neutron beam wavelength of 0.48 nm was 0.6.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Dankook University, 29-San Anseo-dong, Dongnam-gu, Cheonan, Chungnam, 330-714, Korea

    Youl Baik & Yong Choi

  2. Department of Liquid Processing and Casting Technology R&D Group, KITECH, 7-47 Songdo-dong, Yeonsoo-gu, Incheon Metropolitan City, Korea

    Byung M. Moon

  3. Interdisciplinary School of Green Energy, UNIST, 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan, 689-798, Korea

    Dong S. Sohn

  4. Institute of Metal Physics of RAS, ul. S. Kovalevskoy 18, Ekaterinburg, 620990, Russia

    S. G. Bogdanov & A. N. Pirogov

  5. Institute of Natural Sciences, Ural Federal University, Mira 19, Ekaterinburg, 620002, Russia

    A. N. Pirogov

Authors
  1. Youl Baik
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  2. Yong Choi
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  3. Byung M. Moon
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  4. Dong S. Sohn
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  5. S. G. Bogdanov
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  6. A. N. Pirogov
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Correspondence to Yong Choi.

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Baik, Y., Choi, Y., Moon, B.M. et al. Effect of gadolinium addition on the corrosion, wear, and neutron absorbing behaviors of duplex stainless steel sheet. Phys. Metals Metallogr. 116, 1135–1142 (2015). https://doi.org/10.1134/S0031918X15110137

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  • DOI: https://doi.org/10.1134/S0031918X15110137

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