About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2027
|
| Presentation Title |
Does Higher Strength Improve Corrosion-Fatigue Resistance? A Comparison of Heat-Treated ZXM100 Magnesium Alloy with Contrasting Yield Strengths |
| Author(s) |
Beril Ulugun, Sophia Isacco, Aadit Walia, Sreenivas Raguraman, Shivam Dixit, Adam Griebel, Timothy P. Weihs |
| On-Site Speaker (Planned) |
Beril Ulugun |
| Abstract Scope |
Magnesium alloys are promising biodegradable implant materials, but alloy optimization is typically based on separate corrosion and mechanical evaluations rather than simultaneous corrosion-fatigue loading. Corrosion-fatigue behavior of equal-channel angular extrusion (ECAE)-processed ZXM100 magnesium alloy was investigated following solution treatment (450°C) or aging (150°C). Aging promoted precipitation strengthening through Ca₂Mg₆Zn₃ precipitate formation while preserving the refined ECAE microstructure, whereas solution treatment dissolved the precipitates and coarsened the microstructure. In vitro three-point bending fatigue tests were conducted to establish S-N curves, evaluate stiffness degradation, and characterize fracture behavior. Aging increased fatigue strength at higher stresses; however, the improvement was substantially smaller than the increase in yield strength, and both microstructures achieved runout at low stresses while exhibiting distinct failure mechanisms: pit-initiated cracking after aging and predominantly intergranular fracture after solution treatment. These findings demonstrate that precipitation strengthening modifies corrosion-fatigue damage mechanisms, highlighting corrosion-fatigue as a critical design criterion for biodegradable magnesium alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Magnesium, Mechanical Properties |