Optimisation of solution treatment of cast Al–Si–Cu alloys

Sjölander, Emma; Seifeddine, Salem

doi:10.1016/j.matdes.2009.10.035

Cited by 75 publications

(47 citation statements)

References 14 publications

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“…Cu concentrations in the centre of the dendrites have been reported in the literature, but these results show some variations. Qian et al [16] and Sjölander et al [15,17] report around 0.7 wt% Cu in similar alloy with SDAS 10 -19 µm while Han et al [18] report 1.2 wt% Cu in an Al-7Si-3.5Cu alloy with SDAS around 40 µm, which is in better agreement with the present investigation. The overall standard deviation for the Mg measurements, is no more than 0.06 unaffected by cooling conditions, whereas for the alloys with Cu levels below 2% the standard deviation of the measurements was approximately 0.06 and around 0.15 for the alloys with higher Cu levels.…”

Section: Microstructure Characterizationsupporting

confidence: 91%

On the Role of Copper and Cooling Rates on the Microstructure, Defect Formations and Mechanical Properties of Al-Si-Mg Alloys

Seifeddine¹,

Sjölander²,

Bogdanoff³

2013

MSA

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This paper aims to assess the role of Cu on Al-Si-Mg alloys, in a range of 0 -5 wt%, qualitatively on microstructure, defect formation, in terms of porosity, and strength in the as-cast conditions. The ternary system of Al-Si-Mg, using the A356 alloy as a base material, were cast using the gradient solidification technique; applying three different solidification rates to produce directional solidified samples with a variety of microstructure coarsenesses. Microstructural observations reveal that as the Cu levels in the alloys are increased, the amounts of intermetallic compounds as well as the Cu concentration in the α-Al matrix are increased. Furthermore, the level of porosity is unaffected and the tensile strength is improved at the expense of ductility.

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Section: Microstructure Characterizationsupporting

confidence: 91%

On the Role of Copper and Cooling Rates on the Microstructure, Defect Formations and Mechanical Properties of Al-Si-Mg Alloys

Seifeddine¹,

Sjölander²,

Bogdanoff³

2013

MSA

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“…As-fabricated Fine microstructure with continuous Si segregations on the grain boundaries of α-Al Coarse dendritic microstructure [18] with Si in the form of flakes [20] Precipitation hardening…”

Section: Point Of Comparison Slm Materials Conventional Cast Materialsmentioning

confidence: 99%

“…Moreover, the fineness of the microstructure dominates the selection of SHT times. For cast alloys, shorter times of SHT are needed to completely homogenize finer microstructures [18], but the characteristically fine microstructure of SLM parts required longer SHT durations to stabilize the microstructure and enhance the mechanical response with and without aging. Precipitation behavior in coarse-grained Al alloys differs from that in ultrafine-grained Al alloys [19].…”

mentioning

confidence: 99%

On the Precipitation Hardening of Selective Laser Melted AlSi10Mg

Aboulkhair

Tuck

Ashcroft

et al. 2015

Metall Mater Trans A

241

105

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Precipitation hardening of selective laser melted AlSi10Mg was investigated in terms of solution heat treatment and aging duration. The influence on the microstructure and hardness was established, as was the effect on the size and density of Si particles. Although the hardness changes according to the treatment duration, the maximum hardening effect falls short of the hardness of the as-built parts with their characteristic fine microstructure. This is due to the difference in strengthening mechanisms.

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“…Solution treatment performs three roles (Li, 1996;Lasa & Rodriguez-Ibabe, 2004;Paray & Gruzleski, 1994;Moustafa et al, 2003;Sjölander & Seifeddine, 2010):…”

Section: Effect Of Solution Treatment On the Mechanical Propertiesmentioning

confidence: 99%