About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Cold Spray Additive Manufacturing: Part Quality and Performance
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Presentation Title |
Localized Surface Modification of HPDC Magnesium Alloys Using Cold Spray to Enhance Surface Properties |
Author(s) |
Sridhar Niverty, Rajib Kalsar, Lei Li, Ayoub Soulami, Glenn Grant, Darrell Herling, Vineet V Joshi |
On-Site Speaker (Planned) |
Sridhar Niverty |
Abstract Scope |
Cast magnesium alloys have potential in automotive applications due to their high specific strength. However, their poor corrosion performance limits their commercial application. In this study, we have utilized cold spray coating technology to improve the surface properties of HPDC Mg-alloys. CP-Zn powders were coated onto AZ91 and AM60 substrates using combinations of carrier gas pressure, temperature, and powder size. Microstructural characterization of the optimized coatings exhibited porosity less than 0.5%, and the formation of a metallurgical and mechanical bond at coating-substrate interface. Wear tests on coated surfaces showed more than 50% decrease in wear rate over uncoated AZ91 substrates, and adhesion tests showed strengths of greater than 25 MPa. EIS and Potentiodynamic polarization showed an increase in the corrosion resistance of Zn coated samples as compared to uncoated substrates. Finally, the optimized Zn coating parameters were utilized to coat curved Mg alloy automotive parts to demonstrate their commercial viability. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Other, |