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Finite Element Analysis of a NI-superalloy welding at elevated temperatures process

  1. Nov 7, 2012 #1
    Hi Guys,

    I'm new to the forum so please be gentle with me.

    I am a final year mechanical engineering student in Ireland and i am doing my final year project on reduceing solidification cracks that are occurring in a weldment of a NI-Super alloy during the welding process. I believe that a FEA of the process that would show me the stresses/strains that are occurring as the weld pool solidifies would be of great benefit to me but i don't know where to start. I've done a bit of FEA work before but never on thermal analysis. Does anyone know of any online tutorial that might help me or if ye could maybe steer me in an appropriate direction id really appreciate it.
  2. jcsd
  3. Nov 21, 2012 #2
    Re: Finite Element Analysis of a NI-superalloy welding at elevated temperatures proce

    FEA would not be good for this. The weld pool is cooling very fast and going thru a phase change with the metallurgical properties are constantly changing. You should consult with a metallurgist about the crater cracking that is occurring. Have you considered the preheat temperatures and the interpass temperature yet? Also, how high is the carbon content? Welding of a brittle allow is very tough. Also, is the weld joint geometry and weld prep correct?

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