About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advanced Coatings for Wear and Corrosion Protection
|
| Presentation Title |
Evolution of mechanical properties of PEO coated Mg rods. |
| Author(s) |
Eric Noe Hernandez Rodriguez, C. Peñuela-Cruz, A Márquez-Herrera |
| On-Site Speaker (Planned) |
Eric Noe Hernandez Rodriguez |
| Abstract Scope |
In this work, the mechanical characterization of coated Mg samples subjected to immersion corrosion is shown. Samples were rods of 6 mm diameter, fabricated according to ASTM E8 standard. Specimens were coated at the gauge section with TiO2/MgO ceramic composite by the plasma electrolytic oxidation (PEO) technique. Specimens were immersed into corrosive solution at different times. To determine the relationship between mechanical properties and experimental variables, experiments were conducted according to a central composite design of experiments. PEO process time and immersion time were selected as input factors, while elastic modulus (E) and yield stress (σy) were the response variables. Tension tests were conducted, and stress-strain curves were obtained, showing a strong dependence of E and σy with immersion time but not with PEO time. Coated specimens retained their mechanical integrity a long time in contrast to un-coated ones. Fracture mechanism was in detail analyzed by SEM and optical microscopy. |