|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||Effect of Mg and Si Content in Aluminum Alloys on Friction Surfacing Processing Behavior
||Jonas Ehrich, Arne Roos, Stefanie Hanke
|On-Site Speaker (Planned)
Friction surfacing (FS) coating layers are generated through severe plastic deformation (SPD) at elevated temperatures (≈0.8 Tmelt). Alloying elements in metals affect heat generation and dynamic recrystallization kinetics during SPD, and therefore require significant adjustments of FS processing conditions. In this study, custom made aluminum alloys (AA 6060 with additions of 2 and 4wt% Mg, and 7.5, 12.5 and 17.5wt% Si) were processed by FS.
With rising Mg content process speeds must be reduced to achieve a steady state process. This is associated with a reduced rate of thermal softening, resulting in more efficient heat generation. The high amount of hard phases in high-Si alloys was expected to cause additional friction and increase heat generation during plastification. However, temperatures decreased with rising Si content. Further effects of Mg and Si content on processing behavior (forces, material efficiency…) and coating properties (dimensions, microstructure…) were evaluated and discussed.
||Planned: Light Metals