Evaluation of Ductile-to-Brittle Transition Temperature by Reference Temperature (T0) Approach at Higher Loading Rates for a Mod.9Cr-1Mo Steel

    (Received 29 September 2013; accepted 20 January 2014)

    Published Online: 2014

    CODEN: MPCOAD

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    Abstract

    To evaluate the ductile-to-brittle transition temperature of ferritic–martensitic steels, the ASTM E1921-based reference temperature (T0) approach has now been widely recognized; however, until now, the standard restricts itself to static/quasi-static loading rates. It is well recognized that the flow stress of rate-sensitive material increases with the strain rate, and thus it is imperative that the increase in loading rate would lead to limited plasticity-induced brittleness, reflected in higher T0. There have been efforts in the literature for developing empirical correlations to derive T0 at higher loading rates from T0 at quasi-static loading rates or vice versa. However, there is a need to experimentally evaluate the T0 at higher loading rates, especially for the 9Cr-1Mo family of steels, proposed to be used as wrapper material in the upcoming commercial liquid-sodium-cooled fast breeder reactors in India. The present study is directed toward determining T0 for Mod.9Cr-1Mo steel at loading rates of 1.12, 3, and 5 m/s.


    Author Information:

    Moitra, A.
    Materials Development and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu

    Sathyanarayanan, S.
    Materials Development and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu

    Sasikala, G.
    Materials Development and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu

    Bhaduri, A. K.
    Materials Development and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu


    Stock #: MPC20130046

    ISSN: 2165-3992

    DOI: 10.1520/MPC20130046

    ASTM International is a member of CrossRef.

    Author
    Title Evaluation of Ductile-to-Brittle Transition Temperature by Reference Temperature (T0) Approach at Higher Loading Rates for a Mod.9Cr-1Mo Steel
    Symposium , 0000-00-00
    Committee E08