Effect of Pb Addition on the Discontinuous and Continuous Mg17Al12-β Precipitate During Solidification of AZ91 Magnesium Alloy

Boby, Arun; Pillai, U.T.S.; Pai, B.C.

doi:10.1007/s12666-012-0232-8

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…During the solidification process of the alloy, Pb concentration in the liquid phase was higher than that in the solid phase due to the diff erence concentration around the solid-liquid interface. The diffusion of the Mg atoms was hindered by the nuclei formation of LPSO phase, which hindered the growth of the secondary phase, and the network microstructure was changed to discontinuous [14] . At the same time, the growth of the LPSO phase was also hindered.…”

Section: Methodsmentioning

confidence: 99%

“…Pb has a high solid solubility in Mg, which can inhibit the diff usion of Mg atoms in solid solution and improve the morphology and distribution of the secondary phase [14] . Zhang [15] found that when Pb was added in the AZ91 alloy, the substitutional solid solution was formed, which causes the lattice distortion of Mg and impedes the migration motion of atoms such as Mg and Al, so that the growth of β-Mg 17 Al 12 phase was hindered and the microstructure of AZ91 alloy was refined.…”

mentioning

confidence: 99%

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Effects of Pb on microstructure, mechanical properties and corrosion resistance of as-cast Mg97Zn1Y2 alloys

Wan

et al. 2018

China Foundry

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E ngineered magnesium alloys with low density, good electromagnetic shielding, and excellent damping suspension properties are widely used in the sports equipment, aerospace, and electronic equipment industries [1-2]. Over the years, Mg-Y-Zn alloys have fascinated scientist and technicians due to a longperiod stacking ordered (LPSO) structure [3-4]. Studies show that the strengthening effect of LPSO phase is dominant over that from the grain refinement and texture [5-6]. The formation of the LPSO phase requires a quantitative relationship between the Y and Zn atoms [7-9]. The hexagonal close-packed structure of Mg can produce stacking faults, and the solid solution atoms (Zn and Y) filled into the staggered layer can result in the lattice distortion. At the same time, the lattice distortion provides an additional stress fi eld that accelerates atomic diffusion and promotes nucleation and growth of LPSO structures [7-9] .

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

Effects of Pb on microstructure, mechanical properties and corrosion resistance of as-cast Mg97Zn1Y2 alloys

Wan

et al. 2018

China Foundry

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“…Magnesium alloy has been paid more attention by many industrial fields such as automotive and 3C (computers, communications and consumer electronics) industries due to its unique properties, such as light weight, high specific strength and specific stiffness and excellent damping property [1,2]. Methods for producing magnesium alloy mainly includes high pressure die-casting (HPDC) [3], forging [4] and semisolid forming (SSF) [5], etc.…”

Section: Introductionmentioning

confidence: 99%

Effects of Processing Parameters on Microstructure and Mechanical Properties of Rheomolded AZ91D Magnesium Alloy

Kang

Zhou

et al. 2015

Trans Indian Inst Met

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An advanced rheomolder, equipped with a thinwalled phone cover mold, was introduced and used to manufacture the AZ91D magnesium alloy. Effects of different processing parameters including pouring temperature, cylinder temperature and injection velocity on the microstructure and mechanical properties were investigated. The results showed that, with the decrease of pouring temperature or the increase of injection velocity, the size of a 1 -Mg decreases while the sphericity increases, and the porosity fraction reduces, which raise mechanical properties of rheomolded AZ91D. As the cylinder temperature decreases, the size of a 1 -Mg decreases and the sphericity increases initially and then remains relatively unchanged while the solid fraction increases continuously. Also, the cylinder temperature has a significant effect on mechanical properties of rheomolded AZ91D and the highest mechanical property is obtained at a cylinder temperature of 555°C. The optimal rheomolded AZ91D with tensile strength of 273 MPa and elongation of 7.2 % were obtained at the pouring temperature of 600°C, injection velocity of 2.1 m/s and cylinder temperature of 555°C. Compared with high pressure die-casting, the tensile strength and elongation were increased by 22.4 and 213 %, respectively.

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Effects of Pb addition on microstructures and elemental distribution of AS-CAST AZ61 Mg alloy

Hou

Gao

2017

Int. J. Mod. Phys. B

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AZ61 Mg alloy contains Al and Zn, and it has a good combination of castability, strength and ductility. However, the effect of other alloying elements on AZ61 is seldom investigated. Lead is a cheap metallic material, though its vapor is hazardous, a small amount of Pb as an alloying addition will not have significant influence on the application of Mg alloys. Studies showed that the Pb addition suppresses the formation and growth of discontinuous precipitation in AZ91 alloy. In our study, a small amount of Pb element was added into the AZ61 alloy. Mechanical properties of the alloy have been improved. The microstructures were examined by the optical microscopy (OP), scanning electron microscopy (SEM) and energy-dispersive spectrometry (EDS). The elemental distribution with Pb alloying was explicitly studied. This alloy composed of [Formula: see text]-Mg phase and [Formula: see text]-Mg[Formula: see text]Al[Formula: see text] phase, while Pb element inclined to distribute in [Formula: see text]-Mg rather than in [Formula: see text]-Mg[Formula: see text]Al[Formula: see text] phase.

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Effect of Pb Addition on the Discontinuous and Continuous Mg17Al12-β Precipitate During Solidification of AZ91 Magnesium Alloy

Cited by 3 publications

References 5 publications

Effects of Pb on microstructure, mechanical properties and corrosion resistance of as-cast Mg97Zn1Y2 alloys

Effects of Pb on microstructure, mechanical properties and corrosion resistance of as-cast Mg97Zn1Y2 alloys

Effects of Processing Parameters on Microstructure and Mechanical Properties of Rheomolded AZ91D Magnesium Alloy

Effects of Pb addition on microstructures and elemental distribution of AS-CAST AZ61 Mg alloy

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