PSI - Issue 53

Luca Marchini et al. / Procedia Structural Integrity 53 (2024) 203–211 Author name / Structural Integrity Procedia 00 (2019) 000–000

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presence of such Si-containing intermetallic layer may mitigate the interdiffusion of Fe and Al atoms, thereby enhancing corrosion resistance (Dangi et al. , 2018). These ternary phases have the potential to hinder the diffusion of atoms by serving as diffusion barriers and/or as inhibitors of the interfacial reaction that forms the η phase (Springer et al. , 2011; Zou et al. , 2021). However, the precise impact of Al-Si-Fe ternary phases remains a subject of debate, given the intricate interplay between interfacial and diffusional processes.

Fig. 5 – SEM-EDS analysis of the samples after 30 min (a-b-c) and 2 h (d-e-f) of immersion time.

Table 2 – EDS analysis of the AM and forged sample after 30 min (a-b) and 2 h (d-e) of immersion time

Spectrum (a-b-d-e)

Al

Si

Ti

Fe

Co

Ni

Mo

74.71 72.02 75.03 73.62 76.71 74.46 75.79 75.64 75.58

4.13

- - - - - - -

14.57 10.61 15.81 10.79 14.56 15.26 14.50 14.82 9.85

2.68 2.80 2.00 1.75 2.94 3.21 1.82 2.06 2.15

2.86 2.24 2.14 1.86 1.90 2.40 2.11 2.81 3.53

1.05 0.82 0.84 0.78

1 2 3 4 5 6 7 8 9

11.52

4.18

11.19

3.90

- -

10.08

4.08 3.29 3.47

0.94 1.21

0.48 0.45

-

Table 3 - EDS analysis of the H11 sample after 30 min (a-b) and 2 h (d-e) immersion time

Spectrum (c-f)

Al

Si

V

Cr

Fe

68.53

15.07

-

1.20

15.20

1 2 3 4 5

-

-

3.15 1.12 0.15 0.02

22.96 73.88 10.19 12.90

60.55 70.70 71.31

15.24 13.74 3.58

0.71 1.93

14.70 23.15