The poisoning effect of Sc or Zr in grain refinement of Al-Si-Mg alloy with Al-Ti-B

Mao, Guoling; Tong, G.D.; Gao, Wenli; Liu, Shanguang; Zhong, Liwei

doi:10.1016/j.matlet.2021.130428

Cited by 27 publications

(7 citation statements)

References 13 publications

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“…The presence of Cr, Zr, and Li elements in the alloy resulted in a reduction of the grain refinement effects of Al-Ti-B, indicating the occurrence of poisoning [32]. G. Mao et al [33] reported that adding Sc or Zr in Al-Si-Mg alloy with Ti-B leads to the apparition of several intermetallic compounds containing Sc and Ti or Zr and Ti. The concentration of Ti as nucleation centers in the molten metal is reduced, leading to poisoning during the nucleation phase of grains.…”

Section: Effect Of Alloying Elements On Al Alloys Grain Refining Effi...mentioning

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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Section: Effect Of Alloying Elements On Al Alloys Grain Refining Effi...mentioning

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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“…GB wetting by the second solid phase can have a strong influence on the properties of materials, including Al alloys [18,20,22,23,[25][26][27][28][29][30][31][32][33][34][35], Fe-based alloys and steels [36,, Co-and Ni-based alloys [78][79][80][81][82][83][84][85], Cu alloys [86,88,90], Ti-and Zr-based alloys [91,93,95,97,, Mg alloys [124,126,[128][129][130][131], as well multicomponent and high-entropy alloys [132,134,[136][137][138][139][140][141][142][143][144].…”

Section: Influence Of Gb Wetting By the Second Solid Phase On The Pro...mentioning

confidence: 99%

“…Almost 20 years have passed since the discovery of the phenomenon of GB wetting by other solid phases in 2004 [17]. The indications of GB wetting by other solid phases were found and studied in a large circle of systems such as Al alloys [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], Fe-based alloys and steels , Co-and Ni-based alloys [77][78][79][80][81][82][83][84][85], Cu alloys [86][87][88][89][90], Ti-and Zr-based alloys , Mg alloys [124][125][126][127][128][129][130][131], as well multicomponent and high-entropy alloys [132][133][134][135][136]…”

Section: Introductionmentioning

confidence: 99%

Grain Boundary Wetting by the Second Solid Phase: 20 Years of History

Straumal

Lepkova

Korneva

et al. 2023

Metals

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Grain boundaries (GBs) can be wetted by a second phase. This phase can be not only liquid (or melted), but it can also be solid. GB wetting can be incomplete (partial) or complete. In the case of incomplete (partial) wetting, the liquid forms in the GB droplets, and the second solid phase forms a chain of (usually lenticular) precipitates. Droplets or precipitates have a non-zero contact angle with the GB. In the case of complete GB wetting, the second phase (liquid or solid) forms in the GB continuous layers between matrix grains. These GB layers completely separate the matrix crystallites from each other. GB wetting by a second solid phase has some important differences from GB wetting by the melt phase. In the latter case, the contact angle always decreases with increasing temperature. If the wetting phase is solid, the contact angle can also increase with increasing temperature. Moreover, the transition from partial to complete wetting can be followed by the opposite transition from complete to partial GB wetting. The GB triple junctions are completely wetted in the broader temperature interval than GBs. Since Phase 2 is also solid, it contains GBs as well. This means that not only can Phase 2 wet the GBs in Phase 1, but the opposite can also occur when Phase 1 can wet the GBs in Phase 2. GB wetting by the second solid phase was observed in the Al-, Mg-, Co-, Ni-, Fe-, Cu-, Zr-, and Ti-based alloys as well as in multicomponent alloys, including high-entropy ones. It can seriously influence various properties of materials.

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“…While inoculants, such as P, Na, and Sr, have demonstrated effectiveness in either primary or eutectic Si refinement, none of them alone is capable of refining both primary and eutectic Si. Combining different inoculants for refinement has shown promise, yet the process is complicated and may result in a "poisoning immune" phenomenon [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Improving Mechanical Property of Hyper-Eutectic Al-Si Alloys via Regulating the Microstructure by Rheo-Die-Casting

Huo

Chen³

et al. 2023

Metals

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The microstructure plays a key role in the mechanical properties of hyper-eutectic Al-Si alloys. In this study, we investigate the microstructural evolution of rheo-die-casting (RDC) on the Al-15Si-4Cu-0.5Mg alloy using a mechanical rotational barrel system. Our findings demonstrate that higher rotational speed and pouring temperature reduce the size and roundness of primary Si particles in the semisolid slurry. Additionally, during RDC, the dendritic aluminum matrix and skeletal iron-containing inter metallics are sheared off, leading to a more uniform and dispersed Al2Cu phase. Ultimately, our rheo-diecasting results indicate the formation of a near globular aluminum matrix, fine primary Si particles, and a homogeneous Al2Cu phase, thus highlighting the efficacy of this processing method for improving the microstructure and properties of the Al-15Si-4Cu-0.5Mg alloy. We suggest that these results hold promise for enhancing the quality of aluminum-based alloys in various industrial applications.

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The poisoning effect of Sc or Zr in grain refinement of Al-Si-Mg alloy with Al-Ti-B

Cited by 27 publications

References 13 publications

Review Of Grain Refinement Performance Of Aluminium Cast Alloys

Review Of Grain Refinement Performance Of Aluminium Cast Alloys

Grain Boundary Wetting by the Second Solid Phase: 20 Years of History

Improving Mechanical Property of Hyper-Eutectic Al-Si Alloys via Regulating the Microstructure by Rheo-Die-Casting

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