Refinement of primary Si in Al–20%Si alloy by MRB through phosphorus additions

Sun, Jianfeng; Liang, Zhang; Wu, Guohua; Liu, Wencaı; Hu, Zhaohua; Chen, Antao

doi:10.1016/j.jmatprotec.2015.06.031

Cited by 13 publications

(5 citation statements)

References 12 publications

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“…It is well known that the morphology and distribution of both forms of Si affect the mechanical properties adversely. However, better mechanical properties can be obtained by refining primary Si and modifying eutectic Si [10]. To this effect, several techniques, such as the addition of modifiers or nucleating agents [11][12][13], melt superheat treatment [14], semi-solid processing [15,16], outfield treatment [17] and rapid solidification processing [18][19][20][21], have been employed to simultaneously refine primary Si and modify eutectic Si.…”

Section: Introductionmentioning

confidence: 99%

Development of high strength suction cast hypereutectic Al–20Si alloy containing gamma alumina and strontium

Acharya

Mondol

Mandal

2020

Materials Science and Technology

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In this research, the hypereutectic Al–20Si alloy, containing an optimised amount of 4 wt-% γ-Al2O3 and 0.1 wt-% strontium, was successfully synthesised through the suction casting process. The cooling rate (563 K s−1) involved during solidification was estimated by measuring secondary dendritic arm spacing. As a result, a significant change in the morphology of silicon was observed and also led to the formation of a small fraction of refined α-Al throughout the microstructure. The work demonstrates that high tensile properties in hypereutectic Al–20Si alloys can be achieved without the use of conventional inoculants (such as phosphorus). The suction cast Al–20Si alloy exhibits remarkably enhanced tensile properties of average ultimate tensile strength of 355 MPa and average ductility of 7.1%.

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Section: Introductionmentioning

confidence: 99%

Development of high strength suction cast hypereutectic Al–20Si alloy containing gamma alumina and strontium

Acharya

Mondol

Mandal

2020

Materials Science and Technology

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“…The renement of primary Si in hypereutectic Al-Si alloys can be achieved by various methods, such as Al-P, Al-Fe-P and the Al-Ti-P-C master alloy, rare element and ultrasonic treatment, and electromagnetic stirring. [5][6][7][8][9][10][11][12][13][14] Although primary Si can be rened by traditional processes, many methods are either complex and cannot be used on a large scale, or they reduce the TC of the Al-Si alloy considerably.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal conductivity and tensile strength of Al–17Si–3.5Cu with SiC-nanoparticle addition

Jiang

2019

RSC Adv.

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“…Because eutectic silicon and primary silicon destroy the continuity of the matrix, the mechanical properties of the alloy should be decrease [4]. At present, AlÀ P, SiÀ P and CuÀ P alloys are used to refine primary silicon [3,5,6]. Master alloys containing rare earth elements [7][8][9][10] are the most commonly used elements to refine eutectic silicon.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of hypereutectic aluminium‐silicon alloy annealing at liquid‐solid region

Wang

Yang

et al. 2019

Materialwissenschaft Werkst

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The microstructure and mechanical properties of hypereutectic Al−Si alloys containing 16 wt.%, 21 wt.% and 30 wt.% Si (AlSi16, AlSi21 and AlSi30) have been investigated in “as‐cast” and “annealed at the liquid‐solid region”. The results show that the morphologies of primary Silicon in AlSi30 changed hardly after being annealed at 587 °C for different time. The morphology of eutectic silicon in all Al−Si alloys changed from flake‐like to granular after being annealed at 587 °C for 5 min to 15 min. With the increase of silicon content, the average size of the granular eutectic silicon decreased. The spheroidized effect for the eutectic silicon in AlSi21 was the best. After being annealed for 15 min, the tensile strength of AlSi16, AlSi21 and AlSi30 alloys decreased by 10.4 %, 11.7 % and 11.5 %, respectively. Their elongation increased 61.1 %, 50.0 % and 33.3 %, respectively. The comprehensive mechanical properties of AlSi16 and AlSi21 alloys were improved markedly after being annealed at 587 °C for 15 min.

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Refinement of primary Si in Al–20%Si alloy by MRB through phosphorus additions

Cited by 13 publications

References 12 publications

Development of high strength suction cast hypereutectic Al–20Si alloy containing gamma alumina and strontium

Development of high strength suction cast hypereutectic Al–20Si alloy containing gamma alumina and strontium

Enhanced thermal conductivity and tensile strength of Al–17Si–3.5Cu with SiC-nanoparticle addition

Microstructure and mechanical properties of hypereutectic aluminium‐silicon alloy annealing at liquid‐solid region

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