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B C E F A D (b):3F (a):1F (c):6F

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(1)

Figure 1 As-cast microstructures of experimental alloys

(a):1F

(b):3F

(c):6F

A

B

C

D

E

F

(2)

Figure 2 - Intermetallics, EBSD patterns and simulated results for Alloys 1F and 6F: (a), (b) and (c) is for α-Al(MnFe)Si from Alloy 1F ( MAD = 0.205); and

(d), (e) and (f) is for Al6(MnFe) from Alloy 6F ( MAD = 0.347)

(a): 1F

(f)

(e)

(c)

(b)

(d): 6F

(3)

Figure 3 – SEM backscatter images (a and c) and element mapping for Si distribution (b and d) in intermetallics in Alloys 1F and 6F

(b):1F-Si

(d):6F-Si

(a):1F

(4)

Figure 4 - Simulated Al-Mn-Mg-Fe-Si phase diagram using Thermo-Calc:

(5)

Figure 5 - Microstructures of experimental alloys after 648K (375°C)/48 h (before etched)

(6)

Figure 6 - Evolution of EC (a) and microhardness (b) during the precipitation treatment

(7)

Figure 7 - Microstructure of experimental alloys after 648K (375°C)/48h (after etched)

(a):1F

(b):3F

(c):6F

PFZ

PFZ

PFZ

Dispersoids

Dispersoids

Dispersoids

(8)

Figure 8 - TEM images of dispersoids in experimental alloys after 648K (375°C)/48h

(a): 1F

(b):3F

(c):6F

0.5 μm

(9)

Figure 9 - Evolution of compression strengths at 573K (300°C) after 648K (375°C)/48h: (a) YS at 0.002 strain and (b) compression strength at 0.1 strain

(10)

Figure

Figure 1 As-cast microstructures of experimental alloys (a):1F (b):3F (c):6F ABCD E F
Figure 2 - Intermetallics, EBSD patterns and simulated results for Alloys 1F and 6F:
Figure 3 – SEM backscatter images (a and c) and element mapping for Si distribution (b and d) in intermetallics in Alloys 1F and 6F
Figure 4 - Simulated Al-Mn-Mg-Fe-Si phase diagram using Thermo-Calc:
+7

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