Volume 1, Issue 5 (May 2004)

    Effect of Heat Treatment and Tantalum on Microstructure and Mechanical Properties of Fe-9Cr-2W-0.25V Steel

    (Received 7 October 2002; accepted 13 June 2003)

    Published Online: 2004

    CODEN: JAIOAD

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    Abstract

    An Fe-9Cr-2W-0.25V-0.07Ta-0.1C (9Cr-2WVTa) steel has a smaller prior-austenite grain size than this same composition without tantalum (9Cr-2WV) when the steels are given a similar heat treatment. Except for prior-austenite grain size, the microstructures of the steels are similar before irradiation, and they develop similar changes in microstructure during irradiation. Nevertheless, the 9Cr-2WVTa shows less effect of irradiation on the Charpy behavior. To determine the effect of grain size on the Charpy properties of the 9Cr-2WV and 9Cr-2WVTa, specimens of the two steels were given various normalization heat treatments to produce different prior austenite grain sizes, and the tensile and impact properties were determined. For the smaller prior-austenite grain sizes, the 9Cr-2WV steel had impact properties similar to or better than those of the 9Cr-2WVTa steel. Differences in the microstructures of the steels were used to explain the observations and what they mean for developing steels with improved properties.


    Author Information:

    Klueh, RL

    Hashimoto, N

    Sokolov, MA
    Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN


    Stock #: JAI11337

    ISSN: 1546-962X

    DOI: 10.1520/JAI11337

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    Author
    Title Effect of Heat Treatment and Tantalum on Microstructure and Mechanical Properties of Fe-9Cr-2W-0.25V Steel
    Symposium The Effects of Radiation on Materials: 21st International Symposium, 2002-06-20
    Committee E10