Microstructure Control of Iron Intermetallics in Al-Si Casting Alloys

Lakshmanan, A.R.; Shabestari, S. Sohrab Heidari; Gruzleski, J. E.

doi:10.1515/ijmr-1995-860704

Cited by 6 publications

(5 citation statements)

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“…The microstructure of cast Al-Si alloys can be refined through chemical inoculation, for example with NiB [34], to refine the primary Al grain size, P to refine primary-Si [35], and Sr to refine eutectic Si [36][37][38]. Microstructural refinement can also be achieved by the application of physical force such as ultrasonication [39][40][41][42][43], shearing [44][45][46], electromagnetic fields [47][48][49], and/or by modifying processing conditions [50,51], such as cooling rate. Further, added elements such as Cu and Mg serves to improve mechanical properties through precipitation strengthening (using dispersion of Al2Cu, Al5Mg8Cu26) [31,33].…”

Section: Aluminium Alloys and Their Applicationsmentioning

confidence: 99%

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A review of Laser Powder Bed Fusion Additive Manufacturing of aluminium alloys: Microstructure and properties

Kotadia

Gibbons

Das

et al. 2021

Additive Manufacturing

133

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Section: Aluminium Alloys and Their Applicationsmentioning

confidence: 99%

“…ultrasonication [42], electromagnetic stirring [47]), and (iii) alteration of solidification conditions (e.g. cooling rate) [50,51].…”

Section: Grain Refinement In Additive Manufacturingmentioning

confidence: 99%

A review of Laser Powder Bed Fusion Additive Manufacturing of aluminium alloys: Microstructure and properties

Kotadia

Gibbons

Das

et al. 2021

Additive Manufacturing

133

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“…Alumin i um alloys with high iron content bring about the degradation of mechanical properties and fracture toughness, which is mainly caused by the formation of platelike AI – Fe based intermetallic compounds, specially the β-phase, which plays an important role in the mechanical behavio u r of a hypoeutectic AlSi alloy. 11,30,31 Figure 10 shows the microstructure of the Al9Si alloy with 0·8 wt - of Fe submitted to the tensile test which was interrupted just after the yield strength. It is possible to note the crack propagating inside the β-Al 5 FeSi particle.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and mechanical behaviour of Al9Si alloy with different Fe contents

Malavazi

Baldan

Couto

2015

Materials Science and Technology

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The role of iron in aluminium-silicon alloys is well established, with the element generally regarded as being detrimental to the mechanical properties. However, iron is sometimes unavoidable so we study for the first time, a larger concentration range of iron than has been previously reported, to establish whether the deterioration in mechanical properties is monotonic with concentration. It is found that the variation is not linear, but that the greatest elongation and mechanical resistance is obtained in the presence of 0?4 wt-% of iron. The mechanism is attributed to the presence of a particular intermetallic compound that has a Chinese script-like morphology.

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“…This measure leads to the formation of the less detrimental a-phase Al 15 (Fe,Mn) 3 Si 2 which has compact block-like or Chinese script morphology. [11][12][13][14][15][16] The role of Fe in Al-Si casting alloys is intensively discussed in several review articles. [16][17][18][19] If Mg is present in the melt, the Mg 2 Si phase and the p-phase Al 8 FeMg 3 Si 6 or Al 9 FeMg 3 Si 5 can form.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on energy absorption capacity of selected Al–Si–Mg casting alloys

Domitner

Bozorgi

Anders

et al. 2015

Materials Science and Technology

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Three hypoeutectic Fe containing Al–Si–Mg alloys for casting crash relevant automotive components are experimentally investigated. The comparatively short heat treatments include solutionising at 540°C for 5 min or at 465°C for 60 min respectively, compressed air quenching and artificial aging at 223°C for 120 min. Characteristic mechanical parameters are determined by tensile, plate bending and Charpy pendulum impact tests. Intermetallic phases are identified by scanning electron and by light microscopy. The results show that increasing the Mg content promotes the precipitation of Mg2Si particles, which enhance the strength. Increasing the Fe content promotes the formation of intermetallic Fe bearing particles which reduce the energy absorption capacity and the ductility. Increasing the Si content has the similar effect, since the volume fraction of the eutectic phase and the size of the intermetallic particles increase.

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Microstructure Control of Iron Intermetallics in Al-Si Casting Alloys

Cited by 6 publications

References 0 publications

A review of Laser Powder Bed Fusion Additive Manufacturing of aluminium alloys: Microstructure and properties

A review of Laser Powder Bed Fusion Additive Manufacturing of aluminium alloys: Microstructure and properties

Microstructure and mechanical behaviour of Al9Si alloy with different Fe contents

Experimental investigations on energy absorption capacity of selected Al–Si–Mg casting alloys

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