Influence of Neodymium Addition on the Microstructure, Mechanical and Thermal Properties of Mg-Si Alloys

Kumar, K. Suresh; Viswanath, Abhilash; Pillai, U.T.S.; Pai, B.C.; Chakraborty, M.

doi:10.1016/j.proeng.2013.03.227

Cited by 11 publications

(4 citation statements)

References 12 publications

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“…In FCC crystals, the preferential growth directions are 〈100〉, and {100} faces have the fastest growth rate [14]. Under ideal growth conditions, the {100} faces of Mg 2 Si crystal will gradually shrink during the growth process, ultimately degrading to corners and edges.…”

Section: Morphologymentioning

confidence: 99%

“…The presence of coarse and brittle Mg 2 Si particles affects the mechanical properties of Mg-Si alloys, specifically the strength and ductility [10,11]. Recently, extensive research has been conducted to control the morphologies and size of the Mg 2 Si phase by adding elements [12][13][14][15] and compounds [16] or employing external highintensity physical energy fields [17]. While these approaches have led to improvements in mechanical properties, there remains a significant gap in research aimed at enhancing the brittleness of Mg 2 Si while maintaining its inherent thermal stability.…”

Section: Introductionmentioning

confidence: 99%

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Morphology and Properties of Mg2Si Phase Modified by Pb in As-Cast Mg-2.5Si-xPb Alloys

Chen,

Yang,

Cui

et al. 2024

Materials

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Pb plays an important role in determining the morphologies and mechanical properties of the Mg2Si phase in Mg-2.5Si-xPb alloys. As the amount of Pb increases from 0.4 wt.% to 1 wt.%, the primary Mg2Si phase is refined during solidification. Its morphologies transform from equiaxed-dendrite to polygonal and finally to roughly circular. The key reason for morphology evolution is the preferential adsorption of Pb atoms on Mg2Si {100} surfaces to suppress the growth rate along the ⟨100⟩ directions, which is demonstrated by the adsorption model based on first principles. In addition, the hardness of the Mg2Si phase decreases with the increasing solution content of Pb according to the results of the nanoindentation. With the addition of Pb at 1 wt.%, Pb content in the primary Mg2Si phase reaches a maximum of 0.4 wt.%, and the hardness of the primary Mg2Si phase reaches a minimum of 3.64 GPa. This reduction in hardness is attributed to the augmented ionic bond ratio resulting from the solution of Pb, which concurrently enhances the toughness of the Mg2Si phase.

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Section: Morphologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphology and Properties of Mg2Si Phase Modified by Pb in As-Cast Mg-2.5Si-xPb Alloys

Chen,

Yang,

Cui

et al. 2024

Materials

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“…Neodymium (Nd), the fourth element of the Ln series, is completely nontoxic to the human body having no carcinogenic impact. In terms of mechanical properties, Nd incorporation improves the ductility, strength, hardness, and ultimate tensile strength of alloys. , Moreover, its addition also enhances the anticorrosive properties of alloys, as Song et al found out that the incorporation of Nd-based coatings on AZ91 Mg alloy increased the corrosion resistance by forming a thick coating, having a dry mud-like morphology.…”

Section: Applications and Prospects Of Ln Elementsmentioning

confidence: 99%

“…In terms of mechanical properties, Nd incorporation improves the ductility, strength, hardness, and ultimate tensile strength of alloys. 73,74 Moreover, its addition also enhances the anticorrosive properties of alloys, 75 as Song et al 76 In this regard, owing to the lower toxicity and multifunctional aspects, Jin et al 77 fabricated Nd conversion coatings on the substrate of the AZ91 Mg alloy. The application of Nd was done by dipping the substrate at 50 °C in a solution of neodymium nitrate, Nd(NO 3 ) 3 , and hydrogen dioxide solution, H 2 O 2 for 50 min.…”

Section: Acsmentioning

confidence: 99%

Lanthanides: The Key to Durable and Sustainable Corrosion Protection

Zehra

Kaseem

2023

ACS Sustainable Chem. Eng.

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Modification of Mg2Si Phase Morphology in Mg-4Si Alloy by Sb and Nd Additions

Dong

Xiang

et al. 2020

J. of Materi Eng and Perform

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We reported the effects of compound modification with Nd and Sb on the microstructure evolution and mechanical properties of Mg-4Si alloys. The characterization results showed that adding 1.0 wt.% Sb and 1.0 wt.% Nd to the alloy can effectively change the morphology of Mg2Si particles. The primary Mg2Si particles changed from coarse dendrites to regular polygons, and the average particle size decreased from 78.3 to 6.5 μm. Meanwhile, the Chinese eutectic Mg2Si became small short fiber. The experimental results showed that the Nd4Sb3 phase could be formed after adding 1.0 wt.% Sb and 1.0 wt.% Nd to the alloy. The Nd4Sb3 phase could act as the heterogeneous nucleation core of Mg2Si phase, which increased the nucleation rate of Mg2Si and improved the morphology of Mg2Si particles. The mechanical properties test found that the tensile properties and Brinell hardness of the alloy were improved with Sb and Nd alloyed. After adding 1.0 wt.% Sb and 1.0 wt.% Nd to the alloy, the ultimate tensile strength increased from 113 to 184 MPa, the elongation increased from 2.23 to 4.61%, and the Brinell hardness increased from 65.45 to 87.32 HB.

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Influence of Neodymium Addition on the Microstructure, Mechanical and Thermal Properties of Mg-Si Alloys

Cited by 11 publications

References 12 publications

Morphology and Properties of Mg2Si Phase Modified by Pb in As-Cast Mg-2.5Si-xPb Alloys

Morphology and Properties of Mg2Si Phase Modified by Pb in As-Cast Mg-2.5Si-xPb Alloys

Lanthanides: The Key to Durable and Sustainable Corrosion Protection

Modification of Mg2Si Phase Morphology in Mg-4Si Alloy by Sb and Nd Additions

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