Producing Ultrafine Grain Structure in AZ91 Magnesium Alloy Cast by Rapid Solidification

Szymanek, Marcin; Augustyn, Bogusław; Kapinos, Dawid; Boczkal, Sonia; Nowak, J.

doi:10.2478/amm-2014-0052

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…The DCP is a fundamental characteristic of as-cast alloys, because it indicates the transition from mass to interdendritic feeding during crystallisation [1,4,7]. Casting defects, such as macrosegregation, shrinkage, porosity and hot tearing begins below the DCP [4,[8][9][10]. Consequently, a thorough , T. Tański*, G. MaTula*, P. snoPiński*, a.E.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Crystallisation Process of Cast Magnesium Alloys Based on Thermal Derivative Analysis / Analiza Procesu Krystalizacji Odlewniczych Stopów Magnezu W Oparciu O Analizę Termicznoderywacyjną

Król¹,

Tański²,

Matula³

et al. 2015

Archives of Metallurgy and Materials

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The paper presents the results of the crystallisation process of cast magnesium alloys based on the thermal-derivation analysis. The effects of aluminium content and cooling rate on the characteristic parameters of the evaluation of magnesium dendrites during solidification at different cooling rates were investigated by thermal-derivative analysis (TDA). Dendrite coherency point (DCP) is defined with a new approach based on the second derivative cooling curve. Solidification behaviour was evaluated via one thermocouple thermal analysis method. Microstructural evaluations were characterised by light microscope, X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. This research revealed that utilisation of d2T/dt2 versus the time curve methodology allows for analysis of the dendrite coherency point.

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Section: Introductionmentioning

confidence: 99%

Analysis of Crystallisation Process of Cast Magnesium Alloys Based on Thermal Derivative Analysis / Analiza Procesu Krystalizacji Odlewniczych Stopów Magnezu W Oparciu O Analizę Termicznoderywacyjną

Król¹,

Tański²,

Matula³

et al. 2015

Archives of Metallurgy and Materials

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“…In order to obtain massive materials from small-sized ribbons (thickness 50-200 μm and width 2-30 mm) it is necessary to apply consolidation processes, i.e. pressing and hot extrusion or forging [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Kapinos,

Szymanek,

Augustyn

et al. 2019

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The article presents research aimed at determining the effect of adding rare earth elements to near-eutectic Al-Si and Al-Si-Ni alloys on the microstructure and mechanical properties of the obtained products. Material for the research was prepared using a melt spinner -a device used for rapid crystallization, casting thin ribbons, which were then subjected in subsequent stages to fragmentation, consolidation and plastic working. The ribbons and extruded rods cast were described in terms of their structure and their strength properties were determined at different measurement temperatures. It was shown that the lightweight materials produced from aluminium alloys using the rapid solidification process have an ultra-fine structure and good strength properties.Analysis under a microscope confirmed that the addition of rare earth alloys Al-Si and Al-Si-Ni causes fragmentation of the microstructure in the tapes produced. The presence of rare earth elements in the alloys tested has an impact on the type and the morphology of the particles of the microstructure's individual components. In addition to the change in particle morphology, the phenomenon of the separation of numerous nanometric particles of intermetallic phases containing rare earth elements was also observed. The change in microstructure caused by the addition of rare earth elements in the form of a mischmetal increases the mechanical properties.

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“…Recent studies have clearly demonstrated that the nanostructuring of metallic biomaterials can considerably improve not only its mechanical properties but also the biocompatibility [6]. The nanocrystalline structures can be produced by non-equilibrium processing technique such as mechanical alloying (MA) [7] or rapid solidification [8].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Corrosion Properties of Magnesium-Bioceramic Nanocomposites

Kowalski

Nowak

Jurczyk

2016

Archives of Metallurgy and Materials

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Magnesium alloys have recently attracted much attention as a new generation of biodegradable metallic materials. In this work, Mg1Mn1Zn0.3Zr-bioceramic nanocomposites and their scaffolds were synthesized using a combination of mechanical alloying and a space-holder sintering process. The phase and microstructure analysis was carried out using X-ray diffraction, scanning electron microscopy and the properties were measured using hardness and corrosion testing equipment. Nanostructured Mg-bioceramic composites with a grain sizes below 73 nm were synthesized. The Vickers hardnesses for the bulk nanostructured Mg-based composites are two times greater than that of pure microcrystalline Mg metal (50 HV0.3). Produced Mg-based bionanomaterials can be applied in medicine.

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Producing Ultrafine Grain Structure in AZ91 Magnesium Alloy Cast by Rapid Solidification

Cited by 6 publications

References 2 publications

Analysis of Crystallisation Process of Cast Magnesium Alloys Based on Thermal Derivative Analysis / Analiza Procesu Krystalizacji Odlewniczych Stopów Magnezu W Oparciu O Analizę Termicznoderywacyjną

Analysis of Crystallisation Process of Cast Magnesium Alloys Based on Thermal Derivative Analysis / Analiza Procesu Krystalizacji Odlewniczych Stopów Magnezu W Oparciu O Analizę Termicznoderywacyjną

Archives of Metallurgy and Materials

Mechanical and Corrosion Properties of Magnesium-Bioceramic Nanocomposites

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