| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-44: Understanding the Role of Alloying on Low Cycle Fatigue Behavior in Mg Alloys |
| Author(s) |
Justin Smith, Aeriel D. Murphy-Leonard |
| On-Site Speaker (Planned) |
Justin Smith |
| Abstract Scope |
In this study the role alloying elements such as Ca and Zn on low cycle fatigue (LCF) behavior and fatigue lifetime were investigated using a methodology employing in-Scanning Electron Microscopy (SEM) loading, ex-situ loading, and Electron Back Scatter Diffraction (EBSD). Fully-reversed, strain-controlled LCF experiments were performed on unalloyed Mg, Mg-2Zn (wt. %) and Mg-2Zn-0.5Ca (wt. %). Total strain amplitudes ranging from 0.2-1.2% were employed to understand the role of plastic strain on deformation mechanisms and fatigue lifetime. Stress-strain hysteresis loops and strain life curves were constructed based on the Coffin-Manson relation to quantify and compare the fatigue behaviors. The results suggested that different plastic deformation mechanisms were active and led to shorter fatigue lives in Mg-2Zn and Mg-2Zn-0.5Ca compared to unalloyed Mg. In-SEM loading and EBSD experiments showed that twinning and detwinning were dominant deformation mechanisms in unalloyed Mg and Mg-2Zn while non-basal slip influenced fatigue behavior in Mg-2Zn-0.5Ca. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Magnesium, Mechanical Properties, Characterization |