Beryllium-enhanced grain refinement of aluminium–titanium alloys

Youdelis, W. V.; Chen, Yang

doi:10.1179/030634582790427343

Cited by 16 publications

(13 citation statements)

References 6 publications

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“…In addition, Be can help purify Mg melts through reducing the level of inclusions, such as iron and other impurities [160]. Furthermore, small amounts of Be alloying into both Al or Mg alloys can decrease the oxidation rate [159,161,162] . Be is one of a few elements that has a higher affinity to oxygen than that of magnesium [160].…”

Section: Bementioning

confidence: 99%

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Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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Highlights The oxidation behaviours of Mg alloys from low to high temperatures are reviewed. Characteristics of MgO during oxidation is discussed. Mechanisms of Mg oxidation is presented. Effect of various alloying elements is analysed. AbstractThis paper reviews (i) the oxidation of Mg alloys at elevated temperatures in air; (ii) the influence of alloying elements on the oxidation of Mg alloys; and (iii) the progress in the development of oxidation-resistant Mg alloys. Low oxidation rates have been shown by Mg alloys containing the alloying elements, Ca, Be and rare earth elements. However, these alloying elements may also decrease mechanical properties, such as ductility.

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Section: Bementioning

confidence: 99%

“…Small amounts of Be reduce tarnishing and the corrosion of Al at room and elevated temperatures [159]. In addition, Be can help purify Mg melts through reducing the level of inclusions, such as iron and other impurities [160].…”

Section: Bementioning

confidence: 99%

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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“…Nombre de grains par unité de longueur en fonction de la teneur en Ti dans l'aluminium pur [37]. figure 13 (a)).…”

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Affinement des grains des alliages Al-(0-17%)Si /

Tahiri¹

2007

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“…The presence of large amounts of Si adversely affects the grain refining efficiency of Ti, as reported in several studies. [1,7,[9][10][11][12][13][14][15][16][17][18] Sigworth and Guzowaski [13] suggested that in the case of grain refinement of Al-Si alloys by conventional Al-5Ti-1B master alloy, titanium silicide coats the surface of Al 3 Ti and poisons the effectiveness of the nuclei present in Al-Ti master alloy. Recent work of Schumacher and Mckay [18][19][20][21] shows that Si poisoning in commercial casting appears to be consistent with the gradual occupation of Al nucleation sites by TiSi 2 .…”

Section: Introductionmentioning

confidence: 99%

Influence of Mg on Grain Refinement of Near Eutectic Al-Si Alloys

Ravi

Manivannan

Phanikumar

et al. 2011

Metall Mater Trans A

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Although the grain-refinement practice is well established for wrought Al alloys, in the case of foundry alloys such as near eutectic Al-Si alloys, the underlying mechanisms and the use of grain refiners need better understanding. Conventional grain refiners such as Al-5Ti-1B are not effective in grain refining the Al-Si alloys due to the poisoning effect of Si. In this work, we report the results of a newly developed grain refiner, which can effectively grain refine as well as modify eutectic and primary Si in near eutectic Al-Si alloys. Among the material choices, the grain refining response with Al-1Ti-3B master alloy is found to be superior compared to the conventional Al-5Ti-1B master alloy. It was also found that magnesium additions of 0.2 wt pct along with the Al-1Ti-3B master alloy further enhance the near eutectic Al-Si alloy's grain refining efficiency, thus leading to improved bulk mechanical properties. We have found that magnesium essentially scavenges the oxygen present on the surface of nucleant particles, improves wettability, and reduces the agglomeration tendency of boride particles, thereby enhancing grain refining efficiency. It allows the nucleant particles to act as potent and active nucleation sites even at levels as low as 0.2 pct in the Al-1Ti-3B master alloy.

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Beryllium-enhanced grain refinement of aluminium–titanium alloys

Cited by 16 publications

References 6 publications

Oxidation of magnesium alloys at elevated temperatures in air: A review

Oxidation of magnesium alloys at elevated temperatures in air: A review

Affinement des grains des alliages Al-(0-17%)Si /

Influence of Mg on Grain Refinement of Near Eutectic Al-Si Alloys

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