Ichiji Obinata, Kensuke Kurihara, Yô Takeuchi and Rokuro Kawanishi
Physical, chemical and mechanical properties of the ingots of aluminium as well as of its alloys obtained by S.A.C. process have been measured and compared with those obtained by chill casting. Results obtained may be summarized as follows: S.A.C. ingots have always finner grain-structure and smaller tendency for dendritic crystallization than chill ingots, especially in the case of pure aluminium. No marked difference in the specific gravity and electrical resistance have been detected between S.A.C. and chill ingots. Attenuation of ultrasonic waves of S.A.C. aluminium ingot showed smaller value than the chill ingot, showing the soundness of the former. Contents of hydrogen, alumina and magnesium in S.A.C. ingots were almost equal to those in chill ingots and the tendency for inverse segregation of copper in S.A.C. ingot was not conspicuous S.A.C.2S ingots showed larger tensile strength, elongation and resistance to deformation than chill ingots, though the difference was not marked in the case of aluminium alloys.
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