About this Abstract |
Meeting |
Advances in Welding and Additive Manufacturing Research 2022
|
Symposium
|
Advances in Welding and Additive Manufacturing Research 2022
|
Presentation Title |
Metallurgical Observations of Stress Relaxation Cracking in Austenitic Materials |
Author(s) |
Tapasvi Lolla, John Albert Siefert, Geoff West, John Shingledecker |
On-Site Speaker (Planned) |
Tapasvi Lolla |
Abstract Scope |
Stress relaxation cracking is a cracking phenomenon commonly observed in precipitation strengthened austenitic stainless steel materials intended for high-temperature service. Depending on when such cracks form (i.e., either during fabrication or during service), this phenomenon or the underlying mechanism has been referred to using other names such as stress relief cracking, reheat cracking and strain induced precipitation hardening. Investigations of such cracking events have revealed certain microstructural traits across components made from various alloy families. In this work, microstructural characteristics of components made from three austenitic alloys; 347H grade austenitic stainless steel tube, 316H thick section pipe and tubes of 740H nickel-based austenitic alloy, which have exhibited this cracking phenomenon are discussed and the similarities in the cracking behavior along with certain clear differences in the manifestation of damage in these components are detailed. |
Proceedings Inclusion? |
Undecided |