Role of Al modification on the microstructure and mechanical properties of as-cast Mg–6Ce alloys

Jiang, Zhongtao; Jiang, Bin; Zeng, Ying; Dai, Jiahong; Pan, Fusheng

doi:10.1016/j.msea.2015.08.002

Cited by 39 publications

(8 citation statements)

References 42 publications

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“…The grain morphology of the YA61 alloy is equiaxed and it is easily observed that there are some particles (represented by arrows in Figure 5 b,g,h) at the grain center in the optical microscope. A similar phenomenon has been found in the literature [ 20 , 21 , 23 ]. However, as the content of Al continued to increase by 2–5%, the grain gradually coarsened.…”

Section: Resultssupporting

confidence: 89%

“…There is a broad range for the size distribution of the P-Al 2 Y particles (3–17 μm). However, about 65 vol % of the particles are 4–7 μm, which is consistent with the requirement as a grain refiner, according to the active P-Al 2 Y nucleation particles in the Mg-10Y alloy [ 23 ], the active Al 2 Ce nucleation particles in the Mg-6Ce alloy [ 20 ], the active Al 2 Gd nucleation particles in the Mg-10Gd alloy [ 18 ] and the active Al 2 Nd nucleation particles in the Mg-5Nd alloy [ 21 ]. In addition, the as-extruded YA65 alloy can also be regarded as magnesium matrix composites that are reinforced by the P-Al 2 Y particles.…”

Section: Resultssupporting

confidence: 58%

“…More recently, the published studies have suggested that the addition of alloying elements to an alloy matrix can form a secondary phase in situ that acts as a heterogeneous nucleation agent to refine grains. For example, the Mg 24 Y 5 phase in the Mg-9Li-0.3Y alloy [ 13 ], the AgZn 3 phase in the Zn-4.5Ag alloy [ 14 ] and the Al 3 Zr phase in the Al-0.3Zr alloy [ 15 , 16 ], especially the Al 2 RE series phases in the Mg-RE-Al (RE=Y, Gd, Sm, Ce or Nd) alloys [ 17 , 18 , 19 , 20 , 21 ], have been widely studied. It is also believed that these secondary phases can improve the strength of the Mg alloys due to their fine grain size and secondary phase strengthening.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of Magnesium Alloy Containing Al2Y Particles

et al. 2018

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A magnesium alloy containing Al2Y particles was successfully fabricated by changing the content of Al in the Mg-6Y alloy melt. Its microstructure and mechanical properties were subsequently characterized. The results show that two types of Al2Y particles were discovered in the Mg-6Y-xAl (x = 0.5–5) alloys, which are namely the polygonal particles in the pre-precipitated phase and the discontinuous network of particles in the eutectic phase. With an increase in Al content, the amount of pre-precipitated Al2Y increases and the eutectic decreases gradually. When the Al content is 5 wt %, Al2Y particles are almost all in the pre-precipitated phase in the Mg-6Y alloy. After hot extrusion, the YA65 alloy could be regarded as the Mg master alloy that contains Al2Y particles with heterogeneous nucleation capability or Al2Y particle-reinforced magnesium matrix composites. The tensile strength of the as-extruded magnesium alloy is significantly improved at ambient temperatures.

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Section: Resultssupporting

confidence: 89%

Section: Resultssupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of Magnesium Alloy Containing Al2Y Particles

et al. 2018

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“…Most recently, the inhibition effect of Pr 3 Al 11 phase on Mg crystallite growth in Mg‐based alloys or composites has been observed This raises the question as to whether Pr 3 Al 11 nanoparticles have a positive effect on cycle durability of hydrogen absorption and desorption in Mg‐based composites.…”

Section: Introductionmentioning

confidence: 99%

Superior Hydrogen Absorption–Desorption Cycle Durability of Ball‐Milled 82MgH₂‐3PrH₂‐15Al Composite

2019

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In order to improve hydrogen absorption‐desorption cycle durability, an 82MgH2–3PrH2–15Al (in molar ratio) composite is ball‐milled under a 4 MPa hydrogen atmosphere. The ball‐milled composite exhibits enhanced cycle stability as compared to ball‐milled MgH2 sample. The powder X‐ray diffraction patterns and high‐resolution transmission electron microscopy images reveal that Pr3Al11 phase is in situ formed in the initial dehydrogenation process of ball‐milled 82MgH2‐3PrH2‐15Al composite, which keeps unchanged during subsequent hydrogen absorption‐desorption cycling. The Pr3Al11 nanoparticles are beneficial to cycle durability in the 82MgH2‐3PrH2‐15Al composite due to their inhibition of crystallite growth and impediment to surface oxidation for Mg.

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“…Jiang et al [28] reported that the grain size of a Mge6Ce alloy was significantly reduced by adding 3e5% Al.…”

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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Role of Al modification on the microstructure and mechanical properties of as-cast Mg–6Ce alloys

Cited by 39 publications

References 42 publications

Preparation and Characterization of Magnesium Alloy Containing Al2Y Particles

Preparation and Characterization of Magnesium Alloy Containing Al2Y Particles

Superior Hydrogen Absorption–Desorption Cycle Durability of Ball‐Milled 82MgH₂‐3PrH₂‐15Al Composite

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

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Role of Al modification on the microstructure and mechanical properties of as-cast Mg–6Ce alloys

Cited by 39 publications

References 42 publications

Preparation and Characterization of Magnesium Alloy Containing Al2Y Particles

Preparation and Characterization of Magnesium Alloy Containing Al2Y Particles

Superior Hydrogen Absorption–Desorption Cycle Durability of Ball‐Milled 82MgH2‐3PrH2‐15Al Composite

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

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Superior Hydrogen Absorption–Desorption Cycle Durability of Ball‐Milled 82MgH₂‐3PrH₂‐15Al Composite