A study of the mechanical properties of a Mg-Al-Zn alloy (AZ91) produced via Thixomolding

Okayasu, Mitsuhiro; Fukui, Tsuguya

doi:10.1007/s12289-020-01589-2

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…Thixomolding process involves heating and stirring of Mg alloy chips with the screw in a barrel [2], and the semi-solid slurry is then directly injected into the die to mold the parts without melting and possibly without protective gas. Moreover, compared with die-casting, thixomolded Mg alloys exhibit superior mechanical properties and corrosion resistance owing to the low porosity and uniform distribution of the second phase [3,4].…”

Section: Introductionmentioning

confidence: 99%

Development of High Strength and High Thermal Conductivity Semi-Solid Magnesium Alloy by Thixomolding Process

Gu,

Shang,

Wang

et al. 2023

SSP

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This paper investigates the influence of Cu addition on the microstructure, mechanical properties, and thermal conductivity of a semi-solid Mg-10Zn alloy produced by Thixomolding process. Microstructure of the Mg-10Zn alloy consists of α-Mg matrix and Mg2Zn second phase. The formation of Cu3Zn phase was found after the addition of Cu particles. Besides, the volume fraction of solid phase decreased in the Mg-Zn/Cu alloy compared with that of binary Mg-Zn alloy. The yield strength of the alloy was enhanced from 157MPa to 188MPa after Cu addition at the sacrifice of a small amount of ductility. Thermal conductivity, on the other hand, were kept the same level of 115-117 (W/m·K) in the Mg-10Zn alloy and Mg-10Zn/Cu alloy. This work demonstrates the potential for developing Mg alloys with high strength and high thermal conductivity via proper alloy design using Thixomolding process.

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Section: Introductionmentioning

confidence: 99%

Development of High Strength and High Thermal Conductivity Semi-Solid Magnesium Alloy by Thixomolding Process

Gu,

Shang,

Wang

et al. 2023

SSP

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“…Still, die-cast parts often show variations in mechanical properties due to the presence of various defects [1]. Several evolving casting methods have been suggested to reduce casting defects, including squeeze casting [2], rheocasting [3], and thixomolding [4][5][6]. Among them, the thixomolding process has been successfully industrialized [5] for Mg-Al-based alloys and can create a fine microstructure containing small equiaxed αMg grains (5 to 20 μm) plus a fine-scaled divorced eutectic network of Mg17Al12 [7] with lower porosity level than conventional die casting.…”

Section: Introductionmentioning

confidence: 99%

Heat-Treatment Characteristics and Structure-Property Relationships of Thixomolded AZ91 and Ultralight LAZ771 Magnesium Alloys

Lai,

Hu,

Kuo

et al. 2023

SSP

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Most magnesium alloys are produced by die casting due to their formability issues, but the thixomolding process has recently drawn considerable attention in manufacturing magnesium alloy casings for 3C electronic devices with lower porosity levels. This study compared the mechanical properties and microstructure of thixomolded AZ91 and ultra-light LAZ771 magnesium alloy for thin laptop cases. The experimental results firstly show that the microstructure of as-thixomolded samples contains fine αMg grains and a divorced eutectic network. After solution heat treatment, the ductility is improved due to the dissolution of the non-equilibrium secondary phases. Secondly, microstructural characterization for samples after aging treatment shows that the Mg17Al12 precipitates in AZ91 can be classified into continuous (CPs) and discontinuous precipitates (DPs) according to their morphologies. On the other hand, the AlLi precipitates in LAZ771 after aging treatment are spherical and incoherent with the αMg matrix. Those AlLi precipitates obstruct basal slip of dislocations in αMg matrix more effectively than Mg17Al12, resulting in higher yield strength of peak-aged LAZ771 specimens than heat-treated AZ91 specimens.

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The influence of SiC–Al2O3 reinforcements on the deformation and fracture mechanism of thixomolded Mg-based composite

Gu,

Shang,

Wang

et al. 2024

J Mater Sci

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A study of the mechanical properties of a Mg-Al-Zn alloy (AZ91) produced via Thixomolding

Cited by 3 publications

References 24 publications

Development of High Strength and High Thermal Conductivity Semi-Solid Magnesium Alloy by Thixomolding Process

Development of High Strength and High Thermal Conductivity Semi-Solid Magnesium Alloy by Thixomolding Process

Heat-Treatment Characteristics and Structure-Property Relationships of Thixomolded AZ91 and Ultralight LAZ771 Magnesium Alloys

The influence of SiC–Al2O3 reinforcements on the deformation and fracture mechanism of thixomolded Mg-based composite

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