Defenition of prior austenite grain boundary

  1. What is prior austenite grain boundary?Grain boundary and prior austenite grain boundary are same terminology or different?I am confused:confused:

    Thanks
     
  2. jcsd
  3. Astronuc

    Staff: Mentor

    The prior austenite grain boundary would be the grain boundary of the parent austenite grain.

    Perhaps this will help:
    Ref: http://www.metallography.com/grain.htm

    From the previous paragraph in the cited page -
    See also
    Ref: http://www.metallography.com/types.htm

    Some significance and relevance -
    http://www.vacaero.com/Metallograph...-Voort/martensite-and-retained-austenite.html
     
    Last edited: Dec 7, 2012
  4. Thanks astronuc for the reply.Is it possible to visible prior austenite grain boundary in a ferrite+pearlite microstructure?I read somewhere that during austenite decomposition, further nucleation is happening in austenite grain boundary.

    PS:Prior austenite grain boundary term is used in martensite microstructure.
     
    Last edited: Jan 3, 2013
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