Prediction of glass forming compositions in Al-Fe-Si alloy system by thermodynamic approach

Deshmukh, A. A.; Khond, Anuj; Palikundwar, U. A.

doi:10.1016/j.jnoncrysol.2017.09.044

Cited by 15 publications

(1 citation statement)

References 55 publications

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“…The EDS analysis of points A to J, in Figure 6a,c, was performed and the results are shown in Table 3. According to the Al-Si-Fe binary and ternary phase diagram together with previous research [31][32][33], it can be inferred from Table 3 that both point A and point E at the interface zone I near the steel side were θ-Fe (Al, Si) 3 , meanwhile, both point B and point F at the interface zone II near the Al alloy fusion zone were τ 5 -Al 7.2 Fe 1.8 Si. In addition, the dark gray zone (points C and G) in the Al alloy fusion zone was an α-Al solid solution, and the light gray needle-shaped zone (points D and J) were Al-Si eutectic phases.…”

Section: Macromorphology Analysis Of Al Alloy/steel Cmt Welding-brazi...mentioning

confidence: 60%

Research on the Microstructure and Properties of Al Alloy/Steel CMT Welding-Brazing Joints with Al–Si Flux-Cored Welding Wires

Liu,

Pu,

et al. 2023

Coatings

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Al alloy/steel composite structures combine the advantage of a lightweight Al alloy and high-strength steel and are widely used in new energy vehicles, solar photovoltaic, and other fields. The main problems with the connection of an Al alloy and steel are poor weld formation and difficulty in controlling the thickness of the intermetallic compounds (IMCs) at the interface of the Al alloy and steel, which deteriorates the mechanical properties and corrosion resistance of the Al alloy/steel joints. Therefore, experiments on Al alloy/steel CMT (cold metal transfer, CMT) welding brazing were conducted by using AlSi5 and AlSi12 flux-cored welding wires as filler metals. The macro morphology, microstructure composition, tensile strength, and corrosion resistance of the Al alloy/steel joints were then analyzed. The mechanism of the Noclock flux on the wettability and spreadability of the Al–Si welding wire to a low-carbon steel surface was discussed and the formation behavior of the IMCs at the interface layer of the Al alloy/steel joints was clarified. The results showed that the NH4F and NH4AlF4 of the Noclock flux induced and accelerated the removal of oxide films on the surface of the Al alloy and Al–Si welding wire at a high temperature. It promoted the wettability and spreadability of the Al–Si welding wire, which resulted in the improvement of the Al alloy/steel joint formation. Under the CMT arc heat source, the Al–Si welding wire melted, and then a chemical metallurgical reaction occurred among the Al, Si, and Fe elements. The τ5-Al7.2Fe1.8Si phase formed preferentially near the Al alloy fusion zone while the θ-Fe (Al, Si)3 phase formed near the steel side. Actually, the interface reaction layer was composed of a double-layer compound including the τ5-Al7.2Fe1.8Si phase and θ-Fe (Al, Si)3 phase. Additionally, the IMC thickness of the Al alloy/steel joint with the AlSi12 flux-cored welding wire was 3.01 μm, which was less than that with the AlSi5 flux-cored welding wire, so its tensile strength was less but its corrosion resistance was superior. The main reason for the corrosion resistance of Al alloy/steel joints was the presence of a large amount of Al2O3, FeO, and Fe2O3 in the passive film.

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Section: Macromorphology Analysis Of Al Alloy/steel Cmt Welding-brazi...mentioning

confidence: 60%

Research on the Microstructure and Properties of Al Alloy/Steel CMT Welding-Brazing Joints with Al–Si Flux-Cored Welding Wires

Liu,

Pu,

et al. 2023

Coatings

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Relationship Between the Thermodynamic Parameters, Structure, and Anticorrosion Properties of Al-Zr-Ni-Fe-Y Alloys

Babilas

Łoński

Młynarek

et al. 2020

Metall Mater Trans A

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The influence of the chemical composition on the crystallization process, amorphous phase formation, and the anticorrosion properties of Al-Zr-Ni-Fe-Y alloys are presented. To reduce the number of experiments, a thermodynamic approach was applied in which the entropy and Gibbs free energy of representative alloys were optimized. The low glass-forming ability of Al-Zr-Ni-Fe-Y alloy systems was related to the crystallization of the Al3Zr phase from the melt. The structural analysis showed that phases containing Ni and Fe, such as Al19Ni5Y3, Al10Fe2Y, and Al23Ni6Y4, played a key role in the formation of amorphous alloys. According to this, the simultaneous addition of Ni/Fe and Y is important to prevent the crystallization of Al-based alloys in the melt. The formation of an amorphous phase in Al80Zr5Ni5Fe5Y5 alloys and the complete amorphization of Al85Ni5Fe5Y5 alloys were responsible for the high corrosion resistance compared with fully crystalline alloys. Moreover, the addition of Y had a significant impact on the anticorrosion properties. The XPS results showed that the alloys tended to form a passive Al2O3 and Y2O3 layer on the surface.

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Composition Design and Nanoindentation Studies on Mg-Ca-Zn Metallic Glass

Prabhu

Vincent

Nair

et al. 2022

Metall Mater Trans A

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Prediction of glass forming compositions in Al-Fe-Si alloy system by thermodynamic approach

Cited by 15 publications

References 55 publications

Research on the Microstructure and Properties of Al Alloy/Steel CMT Welding-Brazing Joints with Al–Si Flux-Cored Welding Wires

Research on the Microstructure and Properties of Al Alloy/Steel CMT Welding-Brazing Joints with Al–Si Flux-Cored Welding Wires

Relationship Between the Thermodynamic Parameters, Structure, and Anticorrosion Properties of Al-Zr-Ni-Fe-Y Alloys

Composition Design and Nanoindentation Studies on Mg-Ca-Zn Metallic Glass

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