| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Multi-scale Analysis of Fatigue Damage in Welded Lean Duplex Stainless Steel Components |
| Author(s) |
Ayoub Elmoutaouakkil, Anna Fraczkiewicz, Alexandre Gay, Jacques Stolarz |
| On-Site Speaker (Planned) |
Ayoub Elmoutaouakkil |
| Abstract Scope |
The purpose of the study is to investigate fatigue damage mechanisms of welded assemblies, from full-scale engineering structures to laboratory-scale components analyzed at microstructure level. In that respect, assessments of full-scale tank performance have allowed the comparison of fatigue strength of welded structures to that of its base metal. Hence, the extent of effect of welds’ material and notch effect on fatigue behavior was pointed out.
Further examination of the relative potency of material and notch effect, weld-scale tests were conducted on model specimens, with geometrical and microstructural characteristics similar to that of full-scale tanks. It was demonstrated that crack initiation is the responsible damage mechanism and that failure location is more sensitive to microstructural effects than geometrical one. Furthermore, microstructure-scale analyses have confirmed that cyclic plastic activity preferentially occur within the ferrite phase, which is presumably softer than the austenitic one. |
| Proceedings Inclusion? |
Planned: |