Seeking FEA Help with Final Year Project

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SUMMARY

The discussion centers on a final year mechanical engineering student's project focused on reducing solidification cracks in a weldment of a nickel-based superalloy during the welding process. The student seeks guidance on performing Finite Element Analysis (FEA) for thermal analysis, specifically to understand the stresses and strains during the weld pool's solidification. Experienced participants advise consulting a metallurgist regarding crater cracking and emphasize the importance of preheat temperatures, interpass temperatures, and the carbon content in the alloy. They also highlight the significance of proper weld joint geometry and preparation.

PREREQUISITES
  • Understanding of Finite Element Analysis (FEA) principles
  • Familiarity with thermal analysis techniques
  • Knowledge of welding metallurgy, particularly nickel-based superalloys
  • Basic concepts of weld joint geometry and preparation
NEXT STEPS
  • Research online tutorials on thermal analysis using FEA software such as ANSYS or Abaqus
  • Consult resources on welding metallurgy, focusing on nickel-based superalloys
  • Study the effects of preheat and interpass temperatures on weld quality
  • Explore best practices for weld joint design and preparation techniques
USEFUL FOR

This discussion is beneficial for mechanical engineering students, welding engineers, and metallurgists involved in welding processes and the analysis of solidification phenomena in superalloys.

Dixie14
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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.
 
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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?

Thanks
Matt
 

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