| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-41: The Role of Interfaces and Crystallographic Grain Orientation on Cyclic Stress Strain Behavior of Magnesium Alloys |
| Author(s) |
Arianna Mena, Justin Smith, Aeriel Murphy-Leonard |
| On-Site Speaker (Planned) |
Arianna Mena |
| Abstract Scope |
The cyclic stress strain (CSS) behavior is noted by its distinct twinning deformation mechanism; however, the introduction of rare earth elements has shown evidence of a non-basal slip preference over twinning that ultimately effects the fatigue life of the material. The CSS behavior and mechanisms of crack initiation were explored in two extruded Mg alloys: Mg-2Nd-1Y-0.1Zr-0.1Ca (rare-earth, RE) and Mg-2Zn-0.5Ca (ZX21) (wt. %). Strain controlled fully reverse low cycle fatigue experiments were conducted ranging in strain amplitude from 0.4% to 1.2%. In an effort to further characterize the microstructure of the alloys, in regard to deformation and damage experienced during fatigue, scanning electron microscopy (SEM) and in-SEM loading was employed in tandem with electron back scatter diffraction (EBSD). Mg-RE displayed a random texture, symmetric hysteresis loops, and a relatively stable CSS behavior. A basal-like texture and deformation twins led to a loop shape that evolved with cycling in ZX21. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Magnesium, Mechanical Properties, Characterization |