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Question about Hall Petch equation

  1. May 28, 2010 #1
    http://img193.imageshack.us/img193/1825/hallp.png [Broken]

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    according to the equation what are the two stress related value that should be entered? (the value before the = and the value after = sing?

    this is a silly question. but i couldn't find any answer and im in a hurry!

    Thanks in advance
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. May 28, 2010 #2


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    Last edited by a moderator: Apr 25, 2017
  4. Dec 3, 2010 #3
    k and sigma0 are constant for a material and their values depend purely on the material.
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