Microstructure and Properties of Sand Casting Magnesium Alloys for Elevated Temperature Applications

Kiełbus, A.

doi:10.4028/www.scientific.net/ssp.176.63

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…Equilibrium β phase is isomorphic to the Mg 5 Gd phase and is identified as a Mg 14 Nd 2 Y phase. Moreover, the occurrence of MgY, Mg 2 Y, and Mg 24 Y 5 phases has been provided [13]. Also, the zirconium-rich core areas have been observed.…”

Section: Microstructure and Properties Of Mg-zr-x Alloys 61 We54 Alloymentioning

confidence: 85%

Microstructure and Properties of Casting Magnesium Alloys Designed to Work in Elevated Temperature

Kiełbus¹

2018

Magnesium Alloys - Selected Issue

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Magnesium alloys are widely used in aerospace and automotive industry due to their low density, good mechanical properties, and good castability. Their main disadvantage is low maximum working temperature (about 120°C for Mg-Al alloys). This led to the development of Mg-Al-RE or Mg-RE-Zr alloys, which can work up to 250°C. The chapter will relate to the sand cast and high pressure die cast magnesium alloys. Material for the research consisted of six magnesium casting alloys: AE44, AJ62, WE54, EV31A, and for comparison AZ91 and AM50. The influence of casting and heat treatment parameters on the microstructure and mechanical properties will be introduced. The relationship between the initial structure, casting parameters, phase composition, and mechanical properties in magnesium alloys will be presented.

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Section: Microstructure and Properties Of Mg-zr-x Alloys 61 We54 Alloymentioning

confidence: 85%

Microstructure and Properties of Casting Magnesium Alloys Designed to Work in Elevated Temperature

Kiełbus¹

2018

Magnesium Alloys - Selected Issue

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“…It also bounds impurities such as Ni, Cu or Fe, increasing alloys corrosion resistance. Silver addition leads to increased age hardening response of Mg-RE alloys [4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Wall Thickness on Castability and Microstructure of the QE22 Magnesium Alloy

Poloczek

Dybowski

Jarosz

et al. 2015

SSP

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Majority structural elements from magnesium alloys are produced by means of casting. The big and complicated elements are mainly sand cast. The aim of the research was to investigate the influence of wall thickness on the castability and microstructure of modern magnesium alloy with RE and Ag additions – QE22. Eight 145x98mm plates have been cast for the research. Their designed thickness was equal: 0.5mm, 1mm, 1.5mm, 2mm, 3mm, 4mm, 5mm as well as 6mm. The parameters of microstructure constituents in each cast has been estimated quantitatively. The critical wall thickness, at which liquid alloy fill the mould cavity completely, is equal 4mm. With decreasing wall thickness, percentage of filled cavity is decreasing linearly. Mean area of grain flat section increased 7 times in the thickest plate (from 501μm2 to 3773μm2). The volume fraction of eutectics as well as alloy hardness decreased in the thickest plate.

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“…It is caused by silver addition, which strongly increase response to age hardening [3,4]. The main drawbacks of this alloy are: weak corrosion resistance and high cost [5]. RZ5 magnesium alloy with rare earth elements addition is characterized by high content of Zn.…”

Section: Introductionmentioning

confidence: 99%

Effect of Modification on the Structure and Properties of QE22 and RZ5 Magnesium Alloys

Roskosz

Dybowski

Paśko

2012

SSP

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Magnesium alloys are the lightest, widely used structural material. They are often used in aeronautical and automotive industries, where the weight savings are essential. Magnesium alloys present acceptable mechanical properties but their high temperature properties are unsatisfactory. This led to development of magnesium alloys with rare earth elements addition. To achieve good mechanical properties these alloys are modified with zirconium. Modification affects positively also corrosion resistance of Mg-RE alloys. It is important to study impact of modifier amount on the structure and properties of these alloys. Unmodified and modified alloys were investigated. Three variants of modification were: modification according to Magnesium-Elektron specification, 50% and 100% more modifier. Mechanical and structural properties were investigated. Fractures were observed on scanning electron microscope. Results showed that grain refinement and yield strength increase with increasing amount of modifier. Impact of modification on tensile strength is unclear, probably because of non-metallic inclusions in the material’s structure. The inclusions sources are oxygenated nappe of liquid metal and fluxes, used during smelting.

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Microstructure and Properties of Sand Casting Magnesium Alloys for Elevated Temperature Applications

Cited by 5 publications

References 14 publications

Microstructure and Properties of Casting Magnesium Alloys Designed to Work in Elevated Temperature

Microstructure and Properties of Casting Magnesium Alloys Designed to Work in Elevated Temperature

Influence of the Wall Thickness on Castability and Microstructure of the QE22 Magnesium Alloy

Effect of Modification on the Structure and Properties of QE22 and RZ5 Magnesium Alloys

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