You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    Volume 8, Issue 5 (October 2019)

    Special Issue Paper

    Dynamic Recrystallization in Austenitic Stainless Steel during Hot Working with Decreasing Deformation Temperature

    (Received 15 January 2019; accepted 8 April 2019)

    Published Online: 2019

    CODEN: MPCACD

      Format Pages Price  
    PDF (1.56 MB) 13 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    The deformation microstructures and the mechanical properties of an advanced austenitic stainless steel subjected to hot forging with a decrease in deformation temperature from 1,323 to 1,073 K were studied. The deformation microstructures were characterized by the development of dynamic recrystallization (DRX), leading to a decrease in the mean grain size from 11 to 1 μm as temperature decreased. Two DRX mechanisms, i.e., discontinuous and continuous ones, operated concurrently during the hot compressions. Corresponding true flow stress gradually increased approaching a steady-state deformation during each compression. The grain refinement was accompanied by an increase in the dislocation density, resulting in significant strengthening. The yield strength increased from about 600 MPa to almost 1,000 MPa as revealed by tensile tests at room temperature. Both the grain-size strengthening and the dislocation strengthening contributed to the overall strength of the processed steel samples with DRX microstructures.

    Author Information:

    Dolzhenko, P.
    Belgorod State University, Belgorod,

    Tikhonova, M.
    Belgorod State University, Belgorod,

    Sakai, T.
    The University of Electro-Communications (UEC Tokyo), Chofu, Tokyo

    Belyakov, A.
    Belgorod State University, Belgorod,

    Kaibyshev, R.
    Belgorod State University, Belgorod,


    Stock #: MPC20190012

    ISSN:2379-1365

    DOI: 10.1520/MPC20190012

    Author
    Title Dynamic Recrystallization in Austenitic Stainless Steel during Hot Working with Decreasing Deformation Temperature
    Symposium ,
    Committee A01