Charpy Transition Studies of an Embrittled AISI 8640 Lower Bainitic Steel

    Volume 22, Issue 6 (November 1994)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 5


    Rinnovatore, JV
    metallurgist and failure analyst; mechanical engineer; and engineering technician, U.S. Army Armament Research, Development and Engineering Center, Picatinny Arsenal, NJ

    Lukens, KF
    metallurgist and failure analyst; mechanical engineer; and engineering technician, U.S. Army Armament Research, Development and Engineering Center, Picatinny Arsenal, NJ

    Reinhold, J
    metallurgist and failure analyst; mechanical engineer; and engineering technician, U.S. Army Armament Research, Development and Engineering Center, Picatinny Arsenal, NJ

    Mahon, W
    metallurgist and failure analyst; mechanical engineer; and engineering technician, U.S. Army Armament Research, Development and Engineering Center, Picatinny Arsenal, NJ

    (Received 27 March 1994; accepted 7 June 1994)

    Abstract

    A study was performed of the effects of phosphorus and arsenic as embrittling agents on the Charpy impact behavior of resulfurized AISI 8640 steel. The steel was heat-treated to several bainitic and one martensitic condition with a wide range of strength levels. Charpy transition temperature curves were developed for each condition. SEM fractography was used to analyze the fracture behavior of the various heat-treated structures. The results show that AISI 8640 steel with high phosphorus and high arsenic was embrittled in the low-strength bainitic condition as well as in the high-strength martensitic condition. Embrittlement was evidenced by low Charpy impact energies, increased transition temperatures, and an intergranular fracture mode.


    Paper ID: JTE11855J

    DOI: 10.1520/JTE11855J

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    Author
    Title Charpy Transition Studies of an Embrittled AISI 8640 Lower Bainitic Steel
    Symposium , 0000-00-00
    Committee E28