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Defenition of prior austenite grain boundary

  1. Dec 7, 2012 #1
    What is prior austenite grain boundary?Grain boundary and prior austenite grain boundary are same terminology or different?I am confused:confused:

  2. jcsd
  3. Dec 7, 2012 #2


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    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 -
    Last edited: Dec 7, 2012
  4. Jan 2, 2013 #3
    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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