A study on the interaction between a Sr modifier and an Al-5Ti-1B grain refiner in an Al-7Si-0.35Mg casting alloy

Lee, Ji-Young; Lee, Jung-Moo; Son, Kwang-Suk; Jang, Jae-il; Cho, Young-Hee

doi:10.1016/j.jallcom.2022.168598

Cited by 15 publications

(5 citation statements)

References 34 publications

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“…The results of studies on the modification of silumins with titanium and boron presented in the literature indicate different effects of these chemical elements [26,69,70]. In [26], the authors, comparing the influence of Al5Ti1B and Al5Ti2B on the microstructure and mechanical properties of the A333 alloy, found that Al5Ti1B was the most effective, which also confirms the results presented in this work that changing the content of individual components affects the effectiveness of the modification of hypoeutectic Al-Si alloys.…”

Section: Results and Discussion Of The Research Resultssupporting

confidence: 85%

“…The results of studies on the modification of silumins with titanium and boron presented in the literature indicate different effects of these chemical elements [26,69,70]. In [26], the authors, comparing the influence of Al5Ti1B and Al5Ti2B on the microstructure and mechanical properties of the A333 alloy, found that Al5Ti1B was the most effective, The AlSi7Mg alloy after modification with the (TiB + AlSi7) master alloy obtained Rm = 169 MPa (Figure 10a), A = 4.4% (Figure 10b) and H = 60 HB (Figure 10c).…”

Section: Results and Discussion Of The Research Resultsmentioning

confidence: 99%

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The Influence of the Proportions of Titanium and Boron in the Al and AlSi7-Based Master Alloy on the Microstructure and Mechanical Properties of Hypoeutectic Silumin, AlSi7Mg

Lipiński

2023

Applied Sciences

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Unmodified hypoeutectic silumins have a microstructure composed of large-sized phases, which are the reason for their low mechanical properties. Many years of research have shown the modifying effects of many chemical elements and their compounds, including the master alloy consisting of Al-Ti-B, often in the form of the finished AlTi5B alloy. In this work, it was decided to check how the proportions of Ti and B content in the Al or AlSi-based master alloy affect the microstructure and mechanical properties of a hypoeutectic silumin, AlSi7Mg. It has been shown that a master alloy containing silicon (with the participation of Al + Ti + B) has a more effective impact on the refinement of the microstructure, and thus an increase in the mechanical properties of the AlSi7Mg alloy, than a master alloy without silicon. It has been shown that the ratio of titanium to boron content in the very-often-used AlTi5B modifier is not always optimal. It has been shown that the use of a master alloy with a composition similar to that of modified silumin with titanium and boron in a 2:1 ratio allows the obtaining of an AlSi7Mg alloy with higher mechanical properties than the alloy after the modification of the AlTi5 master alloy.

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Section: Results and Discussion Of The Research Resultssupporting

confidence: 85%

“…The results of studies on the modification of silumins with titanium and boron presented in the literature indicate different effects of these chemical elements [26,69,70]. In [26], the authors, comparing the influence of Al5Ti1B and Al5Ti2B on the microstructure and mechanical properties of the A333 alloy, found that Al5Ti1B was the most effective, The AlSi7Mg alloy after modification with the (TiB + AlSi7) master alloy obtained Rm = 169 MPa (Figure 10a), A = 4.4% (Figure 10b) and H = 60 HB (Figure 10c).…”

Section: Results and Discussion Of The Research Resultsmentioning

confidence: 99%

The Influence of the Proportions of Titanium and Boron in the Al and AlSi7-Based Master Alloy on the Microstructure and Mechanical Properties of Hypoeutectic Silumin, AlSi7Mg

Lipiński

2023

Applied Sciences

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“…On the other hand, J. Lee et al [38] investigated the simultaneous addition of a Sr modifier and an Al-Ti-B grain refiner to an Al-7Si-0.35Mg cast alloy as well as the interaction between Al-5Ti-1B and Sr. However, they found that by adding both 100 ppm Sr and 500 ppm Ti, the α-Al grain was refined and the eutectic Si was modified.…”

Section: Role Of Strontium and Al-ti-b Grain Refiners On Al Alloysmentioning

confidence: 99%

Review Of Grain Refinement Performance Of Aluminium Cast Alloys

AIT EL HAJ,

Hamadellah,

BOUAYAD

et al. 2023

Metall Mater Eng

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Improving the utilization of aluminum grain refinement in industrial settings is a continual point of focus for research. Grain refinement serves the dual purpose of not only achieving a fine grain size, but also enhancing the mechanical properties of materials. Numerous researchers have dedicated significant efforts over the last decades to explore the grain refinement of aluminium alloys. There have been a number of studies relating to the mechanisms that explains the observed phenomena associated with grain refinement. The most commonly employed are grain refiners based on Al–Ti–B system. However, a limited efficiency of these grain refiners on aluminium silicon alloys with excessive Si and the effect of alloying elements have been noticed. The review examines the impact of the factors influencing grain refining behaviour of master alloys, including the effects of poisoning elements such as Si, Mg, Zr, and Sr. A large grain refiners used for enhancing the properties of aluminium silicon alloys are reviewed. An overview of new refiners has been given. Also, procedures for assessment of grain refinement have been examined.

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“…Similarly, Lee et al studied the effect of Sr modifier and Ti in the form of an Al-Ti-B grain refiner in the Al-7Si-0.35Mg cast alloy, and they investigated the interaction between Sr and Al-5Ti-1B. They reported that the combined additions of Sr and Ti produced both eutectic Si modification and α-Al grain refinement while increasing the nucleation frequency of Al-Si eutectic grains compared to an alloy with the addition of Sr alone [11].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Modifying Alloying Elements in High-Pressure Injection Casting Eutectic Al-Si Alloys

Kılıçarslan,

Akbulut

2024

Sakarya University Journal of Science

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In the study, the mechanical properties of aluminum alloys produced by the injection molding method, especially using Strontium and Titanium metals, were optimized without being subjected to cold forming. Mechanical tests were applied to the alloys produced by the high-pressure casting technique, and their strength, hardness, and microstructure were examined. Optical and SEM microscopy examinations investigated grain structures. Within the scope of the study, AlTi5B1 master alloy and AlSr10 master alloy were added to the pure AlSi10 (Fe) alloy in 5 different compositions. AlTi5B1 master alloy added to pure AlSi10(Fe) alloy significantly increased the hardness by reducing the grain size. Si modification took place with the addition of AlSr10 master alloy, and it was observed that the obtained weight ratios of 150ppm, 300ppm, and 450ppm Sr increased the hardness proportionally by 2.5 HB each. With the increase in Ti and Sr master alloys added, a significant increase was observed in tensile and yield strengths and % elongation rates. In the compression test, the percentage (%) deformation elongation, the reduction of the grain structure of the material by the added Ti and Sr elements, and the transformation of the eutectic silicon into a spherical structure absorbed the applied Fm force. This led to an increase in strength, and while the permanent deformation elongation decreased as the weight of Ti increased, it was observed that the permanent deformation elongation decreased proportionally with each added amount of 150 ppm Sr. The addition of the Ti element reduced the grain size by shrinking the α-Al dendrites, but it did not affect the eutectic Si.

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A study on the interaction between a Sr modifier and an Al-5Ti-1B grain refiner in an Al-7Si-0.35Mg casting alloy

Cited by 15 publications

References 34 publications

The Influence of the Proportions of Titanium and Boron in the Al and AlSi7-Based Master Alloy on the Microstructure and Mechanical Properties of Hypoeutectic Silumin, AlSi7Mg

The Influence of the Proportions of Titanium and Boron in the Al and AlSi7-Based Master Alloy on the Microstructure and Mechanical Properties of Hypoeutectic Silumin, AlSi7Mg

Review Of Grain Refinement Performance Of Aluminium Cast Alloys

Investigation of Modifying Alloying Elements in High-Pressure Injection Casting Eutectic Al-Si Alloys

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