Effect of grain refiner on the tensile and impact properties of Al–Si–Mg cast alloys

Samuel, E. Isaac; Golbahar, B.; Samuel, A. M.; Doty, H. W.; Valtierra, S.; Samuel, F. H.

doi:10.1016/j.matdes.2013.11.058

Cited by 110 publications

(47 citation statements)

References 22 publications

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“…This change affects the morphology of iron-based intermetallics as well. In a previous study, morphology of silicon particles was reported to change in parallel with the increase in casting temperature in modified and unmodified alloys [6,10]. A clear increase in ultimate tensile strength and percentage of elongation value is seen with the addition of Al5TiB master alloy.…”

Section: Microstructure and Tensile Testing Resultsmentioning

confidence: 85%

“…3a. Fracture surface of samples are seen in certain parts of coarse grained Al-Si eutectic and iron-based intermetallics seem to form around Al-Si eutectic [6].…”

Section: Microstructure and Tensile Testing Resultsmentioning

confidence: 97%

“…Also, amount of hydrogen and bifilm contained by liquid metal is effective on mechanical properties and formation of pores in Al alloys [5]. Samuel et al [2,6] report an improvement in mechanical properties after grain refining and T6 heat treatment when AlSi-Mg alloy is modified with Al-10%Sr at 30-200 ppm (with Al-10%Ti, Al-5%Ti-1%B, Al-2.5%Ti-2.5%B, Al-1.7%Ti-1.4%B and Al-4%B) [2,6]. In addition, refining liquid metal with filtration significantly improves its mechanical properties [7].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Modification and Grain Refining on the Microstructure and Mechanical Properties of A356 Alloy

Tunçay

2017

Acta Phys. Pol. A

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In this study, microstructure and mechanical properties of modified (Al10Sr) and grain refined (Al5TiB) A356 aluminum alloy were investigated. To determine the effect of modification and grain refining on the microstructure and mechanical properties of A356 alloy, density measurement, optical microscope and scanning electron microscope examinations and tensile tests were performed. As a result of the study, the highest density and the least percentage of porosity were measured for the modified (with Al10Sr) and grain refined (with 1.5% Al5TiB) alloy system. The lowest density values and the highest percentage of porosity were measured for the unmodified and non-grain refined alloy. According to the tensile tests, average ultimate tensile strength and the highest elongation were obtained for the alloy modified with Al10Sr and grain refined with 1.5% Al5TiB alloy. It was determined that average ultimate tensile strength and percentage of elongation increased as the amount of Al5TiB added for grain refinement and modified to A356 alloy increased.

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Section: Microstructure and Tensile Testing Resultsmentioning

confidence: 85%

“…3a. Fracture surface of samples are seen in certain parts of coarse grained Al-Si eutectic and iron-based intermetallics seem to form around Al-Si eutectic [6].…”

Section: Microstructure and Tensile Testing Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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The Effect of Modification and Grain Refining on the Microstructure and Mechanical Properties of A356 Alloy

Tunçay

2017

Acta Phys. Pol. A

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“…It is assumed that the tensile strength curves are highly influenced by the grain size, smaller grain size resulted in higher tensile strength [1,9]. Hence, the tensile strength curves are inversely proportional to porosity curves in Fig 6. According to the study by Samuel et al [10], porosity influenced tensile strength. Porous, voids, or cracks may cause deterioration on tensile strength.…”

Section: Mechanical Properties Of Adc12/nano Sic Compositesmentioning

confidence: 99%

The effect of nano-SiC on characteristics of ADC12/nano-SiC composite with Sr and TiB addition produced by stir casting process

Zulfia¹,

Salshabia²,

Dhaneswara³

et al. 2018

AIP Conference Proceedings

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ARTICLES YOU MAY BE INTERESTED INAbstract. ADC12 reinforced nano SiC has been successfully produced by stir casting process. Nano SiC was added into ADC12 alloy varied from 0.05 to 0.3 vf-% while Al-5Ti-1B and Sr were kept constant at 0.04 and 0.02 wt-% respectively to all composites. Mg was added 10 wt% to improve reinforce's wettability. The addition of Al-5Ti-1B to the alloy was as grain refiner while Sr was added to modify Mg2Si. All composites were characterized both microstructures analysis and mechanical properties include tensile strength, hardness, wear rate, impact strength, and porosity. The highest properties of composites was obtained at 0.3 vf-% nano SiC addition with UTS of 155.4 MPa, hardness of 46.16 HRB, impact strength of 0.22 J/mm 2 , and wear rate of 1.71 x 10 -5 mm 3 /m. Tensile strength and hardness increased as grain size and porosities decreased. The highest wear resistance was investigated on the composition with the highest hardness. Impact strength decreased due to increasing volume fraction of nano-SiC. The phases present in microsturucture was dominantly Mg2Si which also affected mechanical properties of these composites.

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“…Grain refinement has been proved as an important way to obtain fine primary aAl grains, which can improve the toughness, strength, formability and machinability [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Si poisoning and promotion on the microstructure and mechanical properties of Al–Si–Mg cast alloys

Dong

2018

J Mater Sci

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Hypoeutectic Al-xSi-0.45Mg (x = 6.5, 7.5, 8.5, 9.5) alloys were refined by Al5Ti1B containing TiB 2 and Al3Ti3B containing TiB 2 and AlB 2 , respectively. With increasing Si, Si poisoning on TiB 2 results in the obvious coarsening of primary a-Al in Al5Ti1B-refined alloys from 350 ± 40 to 400 ± 50, 475 ± 50 and 560 ± 80 lm, and the competition between Si promotion on AlB 2 and Si poisoning on TiB 2 leads to the slight coarsening of primary a-Al in Al3Ti3B-refined alloys from 215 ± 30 to 265 ± 35, 265 ± 30 and 315 ± 25 lm. After T6 heat treatment, with increasing Si, the yield strength (YS) of Al5Ti1B-refined alloys increases from 294 ± 2 to 299 ± 2, 304 ± 1 and 309 ± 2 MPa, and the elongation first increases from 3.5 ± 0.8 to 4.5 ± 1.0 and 7.8 ± 1.4%, after decreases to 5.5 ± 1.2%, while the YS of the Al3Ti3B-refined alloys increases from 300 ± 1 to 305 ± 2, 312 ± 1 and 317 ± 2 MPa, and the elongation increases from 6.1 ± 1.1 to 8.5 ± 1.2, 11.8 ± 1.5 and 12.1 ± 1.6%. The increase in the secondary phase and precipitation strengthening results in the increase in strength with increasing Si. With increasing Si, the decrease in porosity formation by decreasing solidification interval and increasing fluidity is superior to the increase in porosity formation by slightly coarsening grain size, which leads to the increase in ductility in the Al3Ti3B-refined alloys, while the competition between porosity decreasing and increasing factors leads to the inverted 'V'-shaped evolution of ductility in the Al5Ti1B-refined alloys.

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Effect of grain refiner on the tensile and impact properties of Al–Si–Mg cast alloys

Cited by 110 publications

References 22 publications

The Effect of Modification and Grain Refining on the Microstructure and Mechanical Properties of A356 Alloy

The Effect of Modification and Grain Refining on the Microstructure and Mechanical Properties of A356 Alloy

The effect of nano-SiC on characteristics of ADC12/nano-SiC composite with Sr and TiB addition produced by stir casting process

Si poisoning and promotion on the microstructure and mechanical properties of Al–Si–Mg cast alloys

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