Table 3.

Chemical compositions (at.%) of points marked in Figure 8.

Test Points	Al	Si	Cu	Ni	C
A	57.19	-	20.81	12.70	9.30
B	63.92	-	16.07	9.10	10.91
C	55.79	-	24.02	8.80	11.39
D	59.01	0.96	25.37	3.23	11.43
E	62.37	5.74	13.10	8.77	10.02