Thirdly iron and nickel react with the Aluminium and additional intermetallic compounds In cores 
appear in the microstructure ( k — phases as Fe Al, Ni Al). the ww 
aloys DY 
wisn 
oo Jagr 
Al | Fe Mn Ni Co Lu vo, anes 
Cast alloy 15.3 13.5 2.5 _ 10.04 n.b. balance‘ base CI 
Sprfalloy [143 [46 22 nb. 2.3 [balance | observed 
vn ? transform 
Table 2: Chemical composition of the investigated alloys, in mass - % NE. 
At the hyp 
ofthe pro 
1200 So or Melt + 
, | Under pra 
1000 [ ' : ’ phase tran 
} ) transformı 
x 800 - . R . J | . \ , re ee] JOE: 
N : a i diagram 0 
ä ' I ; broken In 
on . : oe . i to ang” 
A so De GN ‘ 
i, a«Ni Al : - BER a-% i Key, and O1 Ihe 
. . 1 Qe Bry Ya | .. : 
400 (a) (d) (c _ Wi three mart 
4 8 12 2164 8 12 16 4 8 12 4 8 12 16 
ALUMINIUM, wt—%% content. 
a Cu—Al (Ref. 6), dotted line (Ref. 12); 5 Cu-Al-5Fe (Ref, 13); c Cu-Al-6Ni (Ref. 14); WEICH Ira 
d Cu—Al—5Fe—5Ni (Refs. 4, 15—18) disorderet 
. . . . . The autor 
Figure 1: Influence of the alloying elements iron and nickel on the phase diagram Cu— Al, /6/ es 
B- phase 
Sn —_ ria 
1000}- te 
drain, 
|. ARTE 
— mii 
800! \ I Tie soe 
r ) A 5 X SX 
g \ 7 etchant 
2 600 a _ + _ WE 
2 weer re - 
Da © tho ni 
5 400 ses fac mips 
Te iv \\ Ms 
Ä Res 
200 sult 
Carty 
a ' Bı ı DEZE il Char 
0 A 
10 20 30 " 
at.%Al Ace nie 
Of same 
Figure 2: Transformation diagram of binary Cu — Al alloys, full lines: phase diagram, orn {} 
broken lines: transformation temperatures of the ordering and martensitic transformations, / 7 / I 
Be) | 
Uo. 
40