The role of Al2Y in grain refinement in Mg–Al–Y alloy system

Chang, Haiwei; Qiu, Dong; Taylor, J. A.; Easton, Mark; Zhang, Mingxing

doi:10.1016/j.jma.2013.07.006

Cited by 73 publications

(24 citation statements)

References 34 publications

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“…Edge-to-edge model is believed as a powerful technology to predict the orientation relationship between the adjacent phases ( Ref 20,21). According to this model, there should be at least one pair of close-packed planes that have inter-planar spacing (d-values) mismatch (f d ) less than 10% between the adjacent phases.…”

Section: Grain Refinementmentioning

confidence: 99%

Effect of Mg2Sn Intermetallic on the Grain Refinement in As-cast AM Series Alloy

She

Pan

et al. 2015

J. of Materi Eng and Perform

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In the present work, in order to investigate the grain refinement mechanism of AM containing Sn alloys, the as-cast AM60, AM90 alloys, and the alloys with addition of 1 wt.% Sn were fabricated by traditional casting, respectively. During the solidification of AM + Sn alloys, the morphology of divorced eutectic Mg 17 Al 12 was refined by Mg 2 Sn intermetallic that served as the heterogeneous nucleation cores. The modified Mg 17 Al 12 effectively restricted the grain growth and resulted in a grain refinement. As a result, the yield strength of as-cast AM alloys was significantly enhanced by addition of Sn, while the ductility also improved. Moreover, the edge-to-edge model was employed to predict the orientation relationship between Mg 17 Al 12 and Mg 2 Sn.

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Section: Grain Refinementmentioning

confidence: 99%

Effect of Mg2Sn Intermetallic on the Grain Refinement in As-cast AM Series Alloy

She

Pan

et al. 2015

J. of Materi Eng and Perform

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“…[41] As the rare earth contents in Mg-7Gd-1.4Y-1Al and Mg-10Gd-xAl alloys in an early publication are close and the properitectic Al 2 Gd and Al 2 (Gd x Y 1Àx ) particles are isomorphic, [23,24] the solute Al concentration in the melt when a-Mg starts to form in the above two alloys is regarded to be similar. In the Mg-10Gd-xAl alloys, the majority of Al 2 Gd particles started to form when Al concentration exceeds 0.65 pct.…”

Section: Al Containing Alloysmentioning

confidence: 99%

“…[16,17,43,44] As their morphology changes with cooling rate, Al 2 (Gd x Y 1Àx ) nucleant particles must form after the samples were taken from the crucible and prior to the solidification of a-Mg, i.e., between 923 K and 1013 K (650°C and 740°C) similar to the pro-peritectic Al 2 Y particles in Mg-Y-Al ternary alloys. [41] When the cooling rate increases, the time for Al 2 (Gd x Y 1Àx ) particles to grow decreases during solidification, leading to smaller particles. The microstructure of the 1013 K (740°C) Mg10Gd-2Y-1Al melt quenched into water is shown in Figure 11 to check whether Al 2 (Gd x Y 1Àx ) particles were formed in the crucible before samples were taken from the crucible.…”

Section: Al Containing Alloysmentioning

confidence: 99%

Effects of Cooling Rate and Solute Content on the Grain Refinement of Mg-Gd-Y Alloys by Aluminum

Dai

Easton

Zhang

et al. 2014

Metall Mater Trans A

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The effect of Al additions on grain refinement of Mg-Gd-Y alloys with different solute contents at different cooling rates has been investigated. For all alloys, significant grain refinement was due to the formation of Al 2 (Gd x Y 1Àx ) nucleant particles. The number density and size distribution of Al 2 (Gd x Y 1Àx ) were affected by both solute content and the cooling rate. Grain sizes (d gs ) of Mg-Gd-Y base alloys and of Mg-Gd-Y-Al alloys were related to solute content (defined by the growth restriction factor, Q), cooling rate ( _ T), and area number density (q ns ) and size (d p ) of nucleant particles that can be activated. It is found that grain sizes of Mg-Gd-Y base alloys follow the relationshipp , while grain sizes of Al-refined samples follow the rela-, where a, b, a¢, and b¢ were constants. In addition, the grain refinement effect of Al additions was more susceptible to solute content and the cooling rate than that of Zr which is regarded as the most efficient grain refiner for Mg alloys.

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“…Tong et al [32] reported that 1% Nd slightly refined the AZ91 alloy, but Li et al [33] found that adding a Nd-containing mischmetal coarsened the grain size which increased further as more mischmetal was added. Coarsening also occurred when MgeAleY alloys were investigated [34]. Li et al [35] reported that an addition of 1e3% Gd to an AZ31 alloy produced significant grain refinement.…”

Section: Introductionmentioning

confidence: 99%

On grain coarsening and refining of the Mg–3Al alloy by Sm

StJohn

et al. 2016

Journal of Alloys and Compounds

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a b s t r a c tThe effect of Sm on the microstructure of a Mge3Al alloy has been investigated where it was found that the size of the primary a-Mg grains was significantly coarsened by the addition of 0.7 wt. % Sm, but dramatically refined by 2.1 wt. % Sm. It is proposed that the coarsening effect of Sm is due to a decrease in the nucleation potency of the native AleFeeCeO particles when they transform to the lower potency Al eFeeSmeCeO particles. The grain refinement observed when 2.1 wt. % Sm is added, is caused by the formation of potent Al 2 Sm nucleant particles prior to the solidification of a-Mg. The "InterdependenceTheory" was then applied to describe the nucleant selection process in the Mge3Ale2.1Sm alloy.

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The role of Al2Y in grain refinement in Mg–Al–Y alloy system

Cited by 73 publications

References 34 publications

Effect of Mg2Sn Intermetallic on the Grain Refinement in As-cast AM Series Alloy

Effect of Mg2Sn Intermetallic on the Grain Refinement in As-cast AM Series Alloy

Effects of Cooling Rate and Solute Content on the Grain Refinement of Mg-Gd-Y Alloys by Aluminum

On grain coarsening and refining of the Mg–3Al alloy by Sm

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