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Stress Relief Cracking and Strain Ageing in 347H and In 740H



  • Strains due to forming and welding can accelerate precipitation and increase cracking susceptibility during post-weld heat treatment (Stress Relief Cracking) or long term ageing like in service in alloys 347H and IN740H.
  • IN740H is a relatively new alloy, and the variables effect PWHT cracking susceptibility are not understood in detail


Industry Sponsor: B&W, EPRI

Faculty: John DuPont

Graduate Student: Jonah Duch

Industry Contact: EPRI, Special Metals