|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Cyclic Deformation Induced Twinning in an Austenitic Ferritic Two Phase Alloy during Low Cycle Fatigue
||Guocai Chai, Guocai Chai, Lars Ewenz, Katarina Persson, Martina Zimmermann
|On-Site Speaker (Planned)
Cyclic deformation induced twinning in an austenitic ferritic steel with different phase strength, cold worked and aged conditions have been studied. Low cycle fatigue tests were performed at RT. The structures were studied using EBSD and ECCI. The results show that the softer phase and grain with a higher Schmid factor will undertake plastic deformation first. However, the deformation structures in the FCC and BCC phases are totally different. In austenitic or FCC phase, cyclic deformation induced twinning has occurred. This is the first observation in this type of material. In ferritic or BCC phase, dangle dislocations and dislocation subcells can be observed. However, they can be greatly influenced by material condition. No twinning occurred in the cold deformed material, and planar dislocation slips can now be observed in the ferritic phase in the aged material. The mechanisms related to the stacking fault energy of the material have been discussed.
||Planned: Supplemental Proceedings volume