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The Irradiation Performance and Microstructural Evolution in 9Cr-2W Steel Under Ion Irradiation

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Abstract

Grade 92 steel (9Cr-2W) is a ferritic-martensitic steel with good mechanical and thermal properties. It is being considered for structural applications in Generation IV reactors. Still, the irradiation performance of this alloy needs more investigation as a result of the limited available data. The irradiation performance investigation of Grade 92 steel would contribute to the understanding of engineering aspects including feasibility of application, economy, and maintenance. In this study, Grade 92 steel was irradiated by iron ion beam to 10, 50, and 100 dpa at 30 and 500 °C. In general, the samples exhibited good radiation damage resistance at these testing parameters. The radiation-induced hardening was higher at 30 °C with higher dislocation density; however, the dislocation density was less pronounced at higher temperature. Moreover, the irradiated samples at 30 °C had defect clusters and their density increased at higher doses. On the other hand, dislocation loops were found in the irradiated sample at 50 dpa and 500 °C. Further, the irradiated samples did not show any bubble or void.

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Acknowledgments

The authors gratefully acknowledge the assistance of Dr. Yaqiao Wu, Ms. Jatuporn Burns, Ms. Joanna Taylor, and Mr. Bryan Forsmann at the Microscopy and Characterization Suite (MaCS) facility of the Center for Advanced Energy Studies (CAES). The work was partly supported by the U.S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-05ID14517, as a part of Advanced Test Reactor National Scientific User Facility (ATR NSUF) experiments. Acknowledgement is also extended to Mr. Lloyd M. Price and Dr. Lin Shao at the Department of Nuclear Engineering, Texas A&M University for their help in carrying out the ion irradiation tests.

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Authors and Affiliations

  1. Department of Chemical and Materials Engineering, University of Idaho, Moscow, ID, 83844, USA

    Sultan Alsagabi, Indrajit Charit & Somayeh Pasebani

  2. King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh, 11442, Saudi Arabia

    Sultan Alsagabi

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  1. Sultan Alsagabi
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Correspondence to Sultan Alsagabi.

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Alsagabi, S., Charit, I. & Pasebani, S. The Irradiation Performance and Microstructural Evolution in 9Cr-2W Steel Under Ion Irradiation. J. of Materi Eng and Perform 25, 401–408 (2016). https://doi.org/10.1007/s11665-015-1841-2

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  • DOI: https://doi.org/10.1007/s11665-015-1841-2

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