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Synergistic Effects of Neutron Irradiation and Interstitial Nitrogen on Strain Aging in Ferritic Steels

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Book cover Mechanical and Creep Behavior of Advanced Materials

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

Ferritic steels that are generally used in pressure vessels and various reactor support structures in light water reactors exhibit dynamic strain aging (DSA) resulting in increased work-hardening accompanied by ductility loss. While there is a possibility of adding this embrittlement known as blue brittleness to the well-known radiation embrittlement, it has been amply demonstrated that radiation exposure leads to decreased concentrations of interstitial impurity atoms in solution. Thus the critical temperature for DSA increases with increased neutron fluence very similar to the increase observed in dry hydrogen treated mild steel samples with decreased concentration of nitrogen in solution with increased treatment time. We summarize here the mechanical and fracture studies made on three different materials: a mild steel and two ferritic steels (A533B and A516 Grade70). In addition, effects of interstitial nitrogen are evaluated by heat treating to different times in dry hydrogen atmosphere.

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Authors and Affiliations

  1. Department of Nuclear Engineering, NC State University, Raleigh, NC, USA

    N. Kumar, A. Alsabbagh & K. L. Murty

  2. Department of Mechanical Engineering, SungKyunKwan University, Suwon, South Korea

    C. S. Seok

  3. Jordan University of Science and Technology, Irbid, Jordan

    A. Alsabbagh

Authors
  1. N. Kumar
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  2. A. Alsabbagh
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  3. C. S. Seok
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  4. K. L. Murty
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Correspondence to N. Kumar .

Editor information

Editors and Affiliations

  1. Dept of Chemical and Matls Engrg, University of Idaho Dept of Chemical and Matls Engrg, Moscow, Idaho, USA

    Indrajit Charit

  2. North Carolina State University , Raleigh, North Carolina, USA

    Yuntian T. Zhu

  3. Los Alamos National Laboratory , Los Alamos, New Mexico, USA

    Stuart A. Maloy

  4. University of Tennessee at Knoxville , KNOXVILLE, Tennessee, USA

    Peter K. Liaw

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© 2017 The Minerals, Metals & Materials Society

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Kumar, N., Alsabbagh, A., Seok, C.S., Murty, K.L. (2017). Synergistic Effects of Neutron Irradiation and Interstitial Nitrogen on Strain Aging in Ferritic Steels. In: Charit, I., Zhu, Y., Maloy, S., Liaw, P. (eds) Mechanical and Creep Behavior of Advanced Materials. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51097-2_12

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