It can be further concluded from this investigation that during solidification of AlCu alloys 
with about 4.5 wt% Cu the predominant part of the solid solution is formed at the 
beginning of crystallization. This leads to a considerable disintegration of the melt, and it is 
thus possible that there exists a temperature gap between solidification of the solid solution 
and the formation of the eutectic in which no solidification occurs. 
1 M. C. Flemings, The Solidification of Metals, 6 F. Erdmann-Jesnitzer, W. Bernhardt, Metall 11 
Iron a Steel Inst. (1968) 277/289 (1967) 1032/1037 
2 A. Kohn, J. Philibert, Metal Treatment and 7 F. Jeglitsch, Aluminium 45 (1969) 45/49 
Drops Forging (1960) 327/334 und 351/355 8 P. Pokrzywnicki, Freiberger Forschungs- 
3 W. A. Tiller, I. Iron and Steel Inst. (1959) heft B 124 (1966) 75/153 
338/350 9 D. Schultze, Differentialthermoanalyse, Verlag 
1 H. J. Eckstein, H. J. Spiess, „Kristallisation“‘ Chemie 1969 
VEB Leipzig (1969) 95/111 10 H. J. Dichtl, Radex Rdsch. (1967) 608/615 
5 H. Kostron Z. £. Metallkde. 39 (1948) 333/342, 11 KH. J. Dichtl, R. Mitsche, Berg u. Hüttenmänni- 
Z. f. Metallkde. 40 (1949) 321 sche Monatshefte 114 (1969) 68/79 
Fig. 1. Gußgefüge der Legierung 
G-AICu4Ti (Sandgußprobestab). 
Ätzung: 10 %ige wäßrige NaOH 
300 x 
356