Mechanical and Metallographic Analysis of Hot Rolled Spray Formed Aluminium-Magnesium- Scandium Alloys

摘要

The addition of scandium to aluminium alloys offers the possibility to raise the strength by precipitation hardening. Al-Mg-Sc alloys are also excellently weldable and have a high corrosion resistance. But with conventional alloying methods only a low amount of scandium can be dissolved in aluminium alloys. By using higher cooling rates during solidification more scandium can be retained in supersaturated solid solution. This was realised by spray forming flat products. The flat products have been hot rolled at different temperatures. After hot rolling the microstructure and properties of the sheets were compared with the as sprayed flat products.