1984 Volume 48 Issue 11 Pages 1086-1091
An Al-4.1 mass%Cu alloy was unidirectionally solidified under both the gravity force and the accelerational force with values of 3 G and 5 G. The dendrite tip radius of curvature, ρ, the primary arm spacing, λ1, the length of tips, λ0 and the tip concentration, Ctip, etc. were measured as functions of the growth rate, R.
The tip radius of curvature and the primary arm spacing decreased with the increase of accelerational force. Under 5 G, the values of ρ and λ1, decreased by about 20% and 25%, respectively, from those under 1 G. Their dependences on the growth rate, however, were comparable with those under 1 G. The tip concentration was not affected by the operation of accelerational force, and gravity segregation was not confirmed.
