Impact of grain size on mechanical properties of AlSi7Mg0.3 alloy

Birol, Yücel

doi:10.1016/j.msea.2012.08.115

Cited by 87 publications

(36 citation statements)

References 24 publications

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“…the holding time is not too long to allow gravity segregation. The soluble AlB 2 particles that are known to crystallize from the melt only during cooling once the melt temperature drops to around 640°C are also engaged in the heterogeneous nucleation process [36]. SrB 6 particles are thus believed to be responsible for the marked improvement in grain refinement when Sr is introduced to the melt together with 100 ppm B.…”

Section: Resultsmentioning

confidence: 99%

Melt treatment of Al–Si foundry alloys with B and Sr additions

Birol

2017

J Mater Sci

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Individual Sr and B additions to Al-Si alloy melts fail to provide either grain refinement or modification. Sr and B must be used together to achieve both features for high-quality sound castings. Sr and B solutes in addition to insoluble SrB 6 particles are introduced to the melt when Sr and B are used together. SrB 6 particles and B solutes, which form the AlB 2 particles later during solidification, are believed to be responsible for the marked improvement in grain refinement in the co-addition practice. Sr atoms in liquid solution, on the other hand, are adsorbed on the surface of the Si plates leading to twinning once the melt cools to the eutectic solidification temperature. A series of experiments have shown that a very fine grained matrix and a fine fibrous eutectic are readily obtained when the AlSi7Mg0.3 alloy is inoculated with 100 ppm B and 150 ppm Sr.

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Section: Resultsmentioning

confidence: 99%

Melt treatment of Al–Si foundry alloys with B and Sr additions

Birol

2017

J Mater Sci

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“…During this process, cast structure is homogenized and alloying elements are redistributed [32]. But more importantly, the strength can be further increased due to the spheroidization of eutectic Si particles and the precipitation of fine Mg 2 Si particles [33][34][35][36][37][38]. This is evidenced by the fact, shown in Fig.…”

Section: Tensile Propertiesmentioning

confidence: 97%

The bimodal effect of La on the microstructures and mechanical properties of in-situ A356–TiB2 composites

et al. 2015

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“…They found that the addition of scandium lead to refining the dendrite grain and increasing the hardness of aged (Al-6Si-0.3Mg) alloys, inhibition of softening effects has been observed during this investigation where all of these results the mechanical properties were improved. Birol et al [13] employed the (Al-5Ti-1B) and (Al-3B) as grain refiners to conclude the potential of B additions and study their effects on the mechanical properties. They found that the average grain size of the (Al7Si0.3Mg) grain refined alloys were (156 ± 29 μm) and (465 ± 102 μm), respectively, and secondary dendrite arm spacing (SDAS) values were very similar (30 ± 5 μm).…”

Section: Introductionmentioning

confidence: 99%

Enhancement the Mechanical Properties of Aluminum Casting Alloys (A356) by Adding Nanorods Structures from Zinc Oxide

Zs¹,

Ma²,

Jj³

2017

J Material Sci Eng

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The improvement of the mechanical properties such as tensile strength, hardness, and ductility were studied by a new and developed technique in the additions field (ZnO nanorods additions) under as-cast condition. Different melting temperatures, holding times, and ZnO nanorods amount were used and the refining of the microstructures and comparison of the obtained results with heat treatment conditions were also investigated in this paper. The results showed that the network of eutectic silicon particles is agglomerated, refined, and less angular after adding of ZnO nanorods to A356 aluminum casting alloys with quick solidification by water. Good enhancement in ultimate tensile strength and elongation with slightly increasing in the hardness were observed and they reached 222 MPa, 35%, and 78 HB respectively. Moreover, ZnO nanorods additions to A356 aluminum casting alloys give the possibility to improve the ultimate tensile strength, elongation, and hardness without heat treatment. Furthermore, the optimal melting and holding temperature for the present work is 700°C with holding time of 3 hours.

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Impact of grain size on mechanical properties of AlSi7Mg0.3 alloy

Cited by 87 publications

References 24 publications

Melt treatment of Al–Si foundry alloys with B and Sr additions

Melt treatment of Al–Si foundry alloys with B and Sr additions

The bimodal effect of La on the microstructures and mechanical properties of in-situ A356–TiB2 composites

Enhancement the Mechanical Properties of Aluminum Casting Alloys (A356) by Adding Nanorods Structures from Zinc Oxide

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