Alloy 5083 (AlMg4.5Mn0.7Cr0.15) obtained using rapidly solidified master alloys

In order to increase the homogeneity, grain finishing and physic-mechanical characteristics of the AlMg4.5Mn0.7Cr0.15 (5083) alloy have been used in the development stage and treatment in the liquid phase: conventional solidified AlMg20 master alloy; solidified conventional and rapidly AlMn10, AlCr4 master alloys (which contains fusible heavy elements); solidified conventional and rapidly AlTi5B1 master alloy (for grain finishing). Rapid cooling performed on copper disk has allowed obtaining bands (splatters) with a thickness of 200...300 μm and about 1.5...3 mm wide. Solidification rate was estimated between 10-2...10-3C/s. The rapid cooling on copper disk of the master alloys ensured unif…