Relevant bibliographies by topics / Magnesium rare-earth alloys

Academic literature on the topic 'Magnesium rare-earth alloys'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Magnesium rare-earth alloys"

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Wang, Xiaomin, Yang Su, Lili Guo, Yan Liu, Honggang Li, and Hailin Ren. "Research Progress of Heat Resistant Magnesium Alloys." Journal of Physics: Conference Series 2160, no. 1 (January 1, 2022): 012015. http://dx.doi.org/10.1088/1742-6596/2160/1/012015.

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Abstract Magnesium alloy has extremely excellent properties and is known as “21st Century Green Engineering Material”. This article mainly introduces the influence of the heat resistance and comprehensive performance of the three series of Mg-Al, Mg-Zn and Mg-RE heat-resistant magnesium alloys after adding rare earth elements, alkali metal elements and other elements. Three development directions of improving the heat resistance of magnesium alloys are prospected. These are: 1. Using cheap alloy elements (such as Ca, Si, etc.) to replace rare earth elements of the heat-resistant magnesium alloy, 2. Titanium element is added to improve heat-resistant magnesium alloy’s mechanical properties and its strength, 3. The new casting process and processing technology are used to improve the heat-resistant magnesium alloy’s properties. This article aims to provide technical reference for the development of my country’s magnesium alloy industry.
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Stanford, Nicole. "Recrystallisation of Magnesium Alloys Containing Rare-Earth Elements." Materials Science Forum 753 (March 2013): 297–300. http://dx.doi.org/10.4028/www.scientific.net/msf.753.297.

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The static recrystallisation behaviour of two magnesium alloys after hot rolling have been examined. The alloys chosen for study were the conventional alloy AZ31, and an alloy containing the rare earth element Gadolinium. The recrystallisation kinetics were lower for the rare-earth alloy at low annealing temperatures, but at high annealing temperatures the kinetics were higher for the rare-earth alloy. It is suggested that this change in the comparative recrystallisation kinetics is a result of the improved mobility of the rare-earth solute at higher temperatures. This affects the recrystallisation kinetics through solute partitioning to the grain boundaries. The effect of this segregation on the recrystallisation texture is also discussed.
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Mirza, F. A., Dao Lun Chen, De Jiang Li, and Xiao Qin Zeng. "Cyclic Deformation of Rare-Earth Containing Magnesium Alloys." Advanced Materials Research 891-892 (March 2014): 391–96. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.391.

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Cyclic deformation characteristics of a rare-earth (RE) element containing extruded Mg-10Gd-3Y-0.5Zr (GW103K) magnesium alloy were evaluated via strain-controlled low-cycle fatigue tests under varying strain amplitudes. Microstructural observations revealed that this alloy consisted of fine equiaxed grains and a large number of RE-containing precipitates. Unlike the RE-free extruded magnesium alloys, this alloy exhibited essentially cyclic stabilization and symmetrical hysteresis loop due to relatively weak crystallographic textures and reduced twinning-detwinning activities. The fatigue life of the present alloy was observed to be longer than that of the RE-free extruded magnesium alloys, which could also be described by the Coffin-Manson law and Basquins equation. Fatigue crack was observed to initiate from the specimen surface and crack propagation was basically characterized by fatigue striations.
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Sivashanmugam, N., and K. L. Harikrishna. "Influence of Rare Earth Elements in Magnesium Alloy - A Mini Review." Materials Science Forum 979 (March 2020): 162–66. http://dx.doi.org/10.4028/www.scientific.net/msf.979.162.

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In recent days, the use of Magnesium and its alloys is preferred in defence, automotive and aerospace industries where large size and complex components are required in light weight. Besides, magnesium alloys are used in computers, electronic devices and biomedical applications. Alloying magnesium with rare earth elements (RE) is used to develop the light alloys for the stated applications at elevated temperature. Rare earth magnesium alloys are having unique properties over other metals, including a high specific strength, low thermal conductivity, good damping capacity and good castability. In this review article, the recent development of rare earth magnesium alloys will be reviewed from the view point of novel alloying designs. It has been revealed that in ternary alloy system Mg-ZN-RE alloy exhibited high strength and ductility. This leads the researchers to investigate Mg-ZN-RE alloy recently.
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Ding, Jian, Zheng Fang, Lin Qin, and Wei Min Zhao. "Effect of Re Addition on the Ignition Resistance of Pure Magnesium." Materials Science Forum 788 (April 2014): 88–92. http://dx.doi.org/10.4028/www.scientific.net/msf.788.88.

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This paper focus on the effect of rare earth elements addition on the oxidation resistance of pure magnesium. The results show that the ignition points of the Mg-RE alloys vary like “V” along with the increase of the rare earth elements. When the content of Y reaches 10wt%, the ignition point of magnesium alloy is 890K, about 40K higher than the ignition point of pure magnesium. After the addition of rare earth elements, dense oxide film forms on the surface of Mg-RE alloys. The outer oxidation film mainly consists of rare earth oxide.
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Gu, Ting Ting, Hong Qi Xia, Li Xin Liu, Jing Liu, Ting Qi, Hong Yang Zhao, and Zhi Gang Fang. "Electrochemical Behavior of AZ Magnesium Alloy Containing Rare Earth Element." Materials Science Forum 750 (March 2013): 60–63. http://dx.doi.org/10.4028/www.scientific.net/msf.750.60.

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The electrochemical behavior of a new magnesium alloy (AZ61) containing rare earth elements-cerium (Mg-Al-Zn-Mn-Ce alloys) was investigated in 3% NaCl electrolyte using electrochemical methods such as linear sweep voltammetry, Tafel curves and electrochemical impedance spectroscopy. Scanning electron microscopy was used to characterize the surface morphologies of magnesium and its alloys. The results shows that compared with that of the most commonly used Mg alloy–AZ61, the cerium containing magnesium alloy exhibited higher electrochemical activity, and higher corrosion resistance. The electrochemical activity of Mg-Al-Zn-Mn-Ce was higher than that of Mg and Mg-Al-Zn-Mn-Ce alloys in 3% NaCl. The corrosion resistive order decreased in the following sequence: Mg-Al-Zn-Mn-Ce > Mg-Al-Zn-Mn > Mg. The electrolytes favored anodic magnesium oxidation, but the alloying element of Ce facilitated the formation of dense passive films on alloy surfaces.
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Arrabal, Raúl, Marta Mohedano, Angel Pardo, Karín Paucar, M. Concepción Merino, Endzhe Matykina, Beatriz Mingo, and Gerardo Garcés. "Galvanic corrosion of rare earth modified AM50 and AZ91D magnesium alloys coupled to steel and aluminium alloys." Revista de Metalurgia 50, no. 1 (March 30, 2014): e002. http://dx.doi.org/10.3989/revmetalm.002.

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Guo, Rui Hua, Jie Yu Zhang, Lin Min Wang, Yi Fan, and Ying Jian Guo. "Research on the Thermal Conductivity and Thermal Diffusivity of Magnesium Alloy." Applied Mechanics and Materials 716-717 (December 2014): 84–87. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.84.

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Magnesium, as a kind of lightweight engineering material whose reserves is considerable abundant in the earth, is green environment-friendly materials for the 21st century. Magnesium alloys with its proportion of smaller than the advantages of high strength, good thermal conductivity and easy machining, is becoming a hot spot of attention and research. In this paper, the effects of magnesium alloys thermal conductivity and heat diffusivity were analyzed by consulting documents. Researches showed that all effects of the electron or phonon movement had affected thermal conductivity and thermal diffusivity of alloys. Furthermore, the thermal conductivity and thermal diffusivity of rare earth magnesium alloy were summarized by literature data, Researches showed that Add moderate amount of rare earth elements can improve the thermal conductivity and heat diffusivity of magnesium alloys.
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Kiełbus, Andrzej, Joanna Michalska, and Bartłomiej Dybowski. "The Electrochemical and Immersion Corrosion of Casting Magnesium Alloys Containing Rare Earth Elements." Solid State Phenomena 227 (January 2015): 79–82. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.79.

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<p>Magnesium alloys are widely used mainly in automotive and aerospace industries. There is quite a lot of information about corrosion of the magnesium alloys in available literature. However, the publications concern mainly Mg-Al alloys, while there is a lack of information about Mg-RE-Zr alloys. The following paper presents results of the investigations on the electrochemical corrosion of magnesium casting alloys containing rare earth elements (WE43, WE54, EV31A-Elektron 21) as well as pure magnesium. The alloys were investigated by immersion test in 3.5% NaCl for times up to 7 days. Electrochemical investigations were carried out at ambient temperature in aerated NaCl solution, using potentiodynamic polarization method. It has been shown that the best corrosion resistance is exhibited by alloys with yttrium addition (WE43, WE54), while the weakest by pure magnesium. EV31A alloy exhibits the highest corrosion rate during the immersion test, while WE54 and WE43 alloys had a similar corrosion behavior.</p>
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Trivedi, P., K. C. Nune, and R. D. K. Misra. "Degradation behaviour of magnesium-rare earth biomedical alloys." Materials Technology 31, no. 12 (September 6, 2016): 726–31. http://dx.doi.org/10.1080/10667857.2016.1213550.

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Dissertations / Theses on the topic "Magnesium rare-earth alloys"

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Griffiths, David Glyndwr John. "Understanding texture weakening in magnesium rare earth alloys." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/understanding-texture-weakening-in-magnesium-rare-earth-alloys(3823f6a8-bba7-415f-9326-adc1b1655c8c).html.

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Magnesium has the lowest density of any structural metal making it a strong candidate for weight savings in the aerospace and automotive industries. However, strong crystallographic textures combine with anisotropic deformation modes to severely limit formability in wrought magnesium alloys. Recently improved formability has been achieved by the addition of small concentrations of solute rare earth elements which reduce the intensity of recrystallisation textures. Developing a mechanistic understanding of this effect is critical in leading alloy design towards a new class of highly formable wrought magnesium alloys. In this study the static recrystallisation mechanism of rolled magnesium rare earth alloys, which causes the texture weakening, is examined with a particular emphasis on the contrasting texture weakening effects in binary and tertiary magnesium rare earth alloys. In binary magnesium-rare earth alloys the `rare-earth' texture is simply a weakened deformation texture, while recrystallisation of magnesium-zinc-rare earth alloys produces unique `rare-earth' texture components. In the binary alloys weakened recrystallisation textures are attributed to the generation of `off-basal' orientations within regions of high strain localisation during deformation. These orientations recrystallise and subsequently dominate the recrystallised texture. Texture weakening by this mechanism is also thought to be observed in non-rare earth magnesium alloys where dynamic recrystallisation is suppressed by cold rolling. The unique rare-earth texture components in magnesium-zinc-rare earth alloys are found to be determined by the orientation of shear bands in the material. Similarly to texture weakening in the binary alloys, nuclei for these orientations are thought to develop during deformation as a result of strain incompatibilities within shear bands. The mechanism forming these orientations remains unclear, however it is postulated that a complex change in recovery behaviour within shear bands, as a result of rare earth and zinc additions, may be the cause. Retarded dynamic recrystallisation is suggested to be of critical importance in the texture weakening mechanisms of all magnesium alloys, both rare earth and non-rare earth. In rare earth alloys dynamic recrystallisation is suppressed by the segregation of rare earth atoms to grain boundaries. A combination of high resolution TEM and EDX shows rare earth atoms form clusters approximately 2nm in diameter on grain boundaries which are expected to retard dynamic recrystallisation through a solute drag mechanism.
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Freeney, Timothy Alan. "Friction stir processing of cast magnesium alloys." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.mst.edu/thesis/pdf/Freeney_09007dcc804a9022_3_09007dcc8055e79b.pdf.

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Thesis (M.S.)--University of Missouri--Rolla, 2007.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed June 17, 2008) Includes bibliographical references.
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Yong, Ming S. "Process optimisation of squeeze cast magnesium-zinc-rare earth alloys and short fibre composites." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/15363.

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The work reported in this thesis demonstrates the potential of the squeeze casting process for the production of castings using magnesium aIloys and its composites. In particular, the studies involving composites are focused on fabrication through squeeze infiltration. These show the ability of the squeeze casting process to produce castings of high metallurgical integrity. The work offers a clear understanding of a number of key parameters for the squeeze casting process which are prerequisites for the production of high strength castings of magnesium aIloys and composites. A better understanding of the behaviour of the squeeze cast material tested at both ambient and elevated temperature has been achieved. A methodology, which aIlows the identification of optimum squeeze casting conditions, has been developed. This has been successfully used in the identification of casting conditions which produce the best tensile properties at both test temperatures. Two casting programmes, namely: primary and secondary programmes, were designed to evaluate the controlling parameters for squeeze cast magnesium alloys and composites. The investigation was conducted with two magnesium alloys: ternary RZ5DF (Mg-4.2o/oZn-RE) alloy and commercial RZ5 (MgZn- RE-Zr) alloy. Different preform systems were investigated during the primary casting programme and the results showed that 14% volume fraction alumina fibres with 5 % silica binder provided the most satisfactory results in terms of ease of fabrication, improvement in strength and cost. Applied pressures of 0.1 to 120 MPa were studied with and without the addition of fibre reinforcement. Pressures of 60 MPa and 80 MPa were found to yield optimum tensile properties in the RZ5DF alloy and its composite respectively. It was also found that a preform temperature of 600°C or above was necessary to achieve minimum resistance to magnesium infiltration at the preform surface. Other process settings, such as applied pressure duration, were also investigated. The influence of pouring and die temperature on the tensile properties was studied during the secondary casting programme. It was found that a higher pouring and intermediate die temperature provided the highest tensile properties. The mechanical properties of castings were tested at both ambient and elevated temperatures. It was found that fibre reinforcement improved the mechanical properties of the materials at ambient temperature but the most significant improvement was observed at 250°C. The effect of grain refinement (zirconium) addition on the squeeze cast magnesium alloys and composites was also investigated. The results indicated that the tensile properties in the zirconium-free RZ5DF alloy were comparable to those of the RZ5 alloy grain refined with zirconium. The influence of zirconium addition on the tensile properties of RZ5DF and RZ5 MMC was similarly reported. Heat treatment improved the properties of the alloys by a small margin and adversely affected the properties of the composite. The overall results showed that there is an opportunity to achieve a significant saving in material and process cost when producing Mg-Zn-RE alloys and composites by the squeeze casting process.
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Shekhe, Ahmad Mustafa Abussalam b. "Microstructure and corrosion characteristics of excimer laser melted elektron 21-T6 rare-earth magnesium alloy." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/microstructure-and-corrosion-characteristics-of-excimer-laser-melted-elektron-21t6-rareearth-magnesium-alloy(e352ad12-9362-41e2-bd0c-a1eebc3f4e92).html.

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The present study concerns the application of LSM using an excimer laser to enhance the corrosion resistance of rare-earth Elektron 21 magnesium alloy. The alloy has been treated by an excimer laser to produce a highly homogeneous and refined microstructure for improvement of corrosion resistance. The laser surface treatment was applied on two different prepared surfaces of the alloy; i) a ground surface up to 1200 SiC grit; ii) a chemically cleaned surface using CrO3 +AgNO3 boiling solution. The intermetallic phases within the α-matrix that are believed to initiate corrosion have been dissolved by two methods. The first is by the excimer laser, where they were dissolved in the melted layers. The second is by a chemical dissolution prior LSM. Variation of the laser parameters such as changed laser influence (low, medium and high) and increased number of pulses, resulted in formation of thicker melted layers, but promoted the formation of porosity and micro-cracks particularly at overlap regions. The initial stage of this study was aimed at optimising the laser conditions for production of a uniform microstructure, with an increase in the corrosion resistance of the alloy being determined by potentiodynamic polarization measurements in sodium chloride solution. A laser fluence of 6 and 7 J/cm2 with 10, 20, 25, 40 and 50 pulses with a different overlap ratio of 7%, 20% and 50% were subsequently selected as the optimum condition to treat the surface of the alloy. After laser treatment, the top surfaces and the cross-sections of the alloy showed a relatively homogenous melted layer and a significant reduction in the number of large intergranular Mg-Zn-RE phase was achieved resulting in a significant improvement of the corrosion resistance of the alloy. This work also investigated the mechanism of corrosion and the interaction between the intergranular Mg-Zn-RE phase, the Zr-rich regions within the grains and the bulk Mg-rich matrix. The results obtained by scanning electron microscopy (SEM) / energy-dispersive X-ray (EDX) and scanning Kelvin prop forced microscopy (SKPFM) potential map measurements as well as transmission electron microscopy (TEM) / energy-dispersive X-ray (EDX) have shown the importance of the microstructure in the initiation of corrosion in 3.5 wt% NaCl solution, where the Zr-rich regions played a distinct role in the early stages of corrosion in this alloy. However, the obtained results have demonstrated that such laser melted layers improved the corrosion resistance of the alloy, but further work is still needed to obtain the fully understanding of such behaviour which can better the research results, particularly the selectively chemical dissolution of the second phases prior LSM.
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Basu, Indranil [Verfasser], Günter [Akademischer Betreuer] Gottstein, and Brita Daniela [Akademischer Betreuer] Zander. "Recrystallization mechanisms in wrought magnesium alloys containing rare-earth elements / Indranil Basu ; Günter Gottstein, Brita Daniela Zander." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1130871770/34.

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Silva, Campos Maria del Rosario [Verfasser]. "The role of intermetallic phases in the corrosion of magnesium-rare earth alloys / Maria del Rosario Silva Campos." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2016. http://d-nb.info/1114820385/34.

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Apps, Peter Joseph. "The effects of the rare earth elements yttrium, gadolinium and dysprosium on the microstructure and properties of precipitation hardening magnesium alloys." Thesis, University of Manchester, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488095.

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ZARPELON, LIA M. "Estudo das características eletroquímicas e microestruturais de eletrodos de hidreto metálico à base de LaNi com adições de elementos de liga." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/27133.

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Submitted by Mery Piedad Zamudio Igami (mery@ipen.br) on 2017-03-10T15:20:01Z No. of bitstreams: 1 22060.pdf: 3959215 bytes, checksum: 0a58b276270c30e02d2f6935bafba229 (MD5)
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Neste trabalho avaliou-se a ação positiva da substituição de lantânio por praseodímio e de lantânio por magnésio na performance eletroquímica de eletrodos de ligas de armazenamento de hidrogênio em estado bruto de fusão e com tratamento térmico. O La foi substituído por Mg nas ligas La0,7-xMgxPr0,3Al0,3Mn0,4Co0,5Ni3,8 (x=0,0-0,7) e por Pr nas ligas La0,7-yPryMg0,3Al0,3Mn0,4Co0,5Ni3,8 (y=0,0-0,7). Os parâmetros eletroquímicos analisados foram ativação, capacidade de descarga, retenção da capacidade de descarga, autodescarga e alta taxa de descarga. As ligas apresentaram comportamento passivo em relação à corrosão. As análises por MEV/EDS e por DRX com refinamento por Rietveld revelaram a presença majoritária de fases similares às fases LaNi5, PrNi5, LaMg2Ni9 e PrMg2Ni9 em função das composições das ligas estudadas. Os parâmetros de rede e os volumes da célula unitária das fases diminuíram com a substituição crescente de La por Mg e de La por Pr. As capacidades de descarga máxima decresceram com a substituição crescente de La por Mg e de La por Pr, acompanhando o decréscimo da abundância da fase similar à fase LaNi5 e o aumento da abundância da fase similar à fase LaMg2Ni9. Comparativamente, menores taxas de autodescarga e maior estabilidade cíclica foram observadas para o eletrodo da liga na condição x=0,1, ao passo que o eletrodo da liga na condição y=0,0 apresentou maiores valores de alta taxa de descarga, indicando melhor performance cinética.
Tese (Doutorado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
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Buzolin, Ricardo Henrique. "Mechanical properties and corrosion behaviours of the as-cast ZK40 alloys modified with individual additions of CaO, Gd, Nd and Y." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-13012017-093623/.

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The effect of individual additions of calcium oxide (CaO), Gd, Nd and Y was investigated on the microstructure, mechanical properties and corrosion resistance of the as-cast ZK40 alloy. The microstructural features were analised using optical, scanning and transmission electron microscopy, X-ray diffraction and Scanning Kelvin Atomic Probe Force Microscopy. The compressive and tensile behaviours of the as-cast alloys at room temperature were investigated. Electrochemical Impedance Spectroscopy, hydrogen evolution and weight loss under immersion in 0.5 wt.% NaCl solution were used to evaluate the corrosion behaviour. The results of the mechanical and corrosion tests were correlated with the microstructures. The 2 wt.% Gd addition enhanced the ductility, while the Nd addition resulted in deterioration in mechanical properties. The addition of 2 wt.% Gd and 1 wt.% Y resulted in the improvement of the ductility. The addition of CaO did not affect the mechanical properties while the 2 wt.% Nd deteriorate it. The 1 wt.% Y addition enhanced the ductility. The CaO addition did not caused enhancement in mechanical properties. The corrosion behaviour was enhanced with the addition of CaO and Gd. The modification of ZK40 with Gd opens up new perspectives in the development of Mg-Zn based alloys.
O efeito da adição individual de óxido de cálcio (CaO), Gd, Nd e Y foi investigado na microestrutura, propriedades mecânicas e resistência à corrosão de ligas ZK40 fundidas. As características microestruturais foram analisadas via microscopia óptica, microscopia eletrônica de varredura, microscopia eletrônica de transmissão, difração de Raios-X e \"Scanning Kelvin Atomic Probe Force Microscopy\". O comportamento à compressão e à tração das ligas à temperatura ambiente foi investigado. Espectroscopia eletroquímica de impedância, evolução de hidrogênio e ensaios de imersão em solução de 0.5% em peso de NaCl foram utilizados para avaliar a resistência à corrosão. Os resultados dos ensaios mecânicos e corrosão foram relacionados com a microestrutura. A adição de 2% em peso de Gd melhorou a ductilidade, ao passo que a adição de Nd resultou na piora das propriedades mecânicas. A adição de 2% em peso de Gd e 1% em peso de Y resultou na melhora da ductilidade. A adição de 1% em peso de Y causou uma melhora na ductilidade e a adição de CaO não teve impacto benéfico nas propriedades mecânicas. A resistência à corrosão foi melhorada com a adição de CaO e Gd. A modificação da liga ZK40 com a adição de Gd abre novas perspectivas no desenvolvimento de ligas Mg-Zn.
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Brownsmith, Tomas. "Thermomechanical processing of magnesium alloy Elektron 43." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/thermomechanical-processing-of-magnesium-alloy-elektron-43(460a4e6e-1744-4f6f-b056-ba8f93920a04).html.

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Elektron 43 (WE43C) is a modern magnesium rare earth alloy (Mg-RE) with potential light-weighting applications in wrought civil aerospace components. Rare earth elements are known to improve mechanical properties and weaken texture of wrought Mg-RE alloys, but for Elektron 43 the parameters of thermomechanical processing (TMP) that produce optimum microstructure development are not well understood. A large data-set of Elektron 43 flow stress data was collected in an extensive range of hot compression tests at typical TMP temperatures (350-500°C) and strain rates (0.001-100\s). Friction parameters were determined in a ring compression study. Material data was corrected for friction, strain rate and temperature variations. Parameters were fit for a sinh constitutive equation. The corrected material data and used to develop an initial finite element model in the commercial software package QForm. Further work to calibrate the heat transfer parameters is required. The effect of two extrusion parameters (temperature and ram speed) on microstructure and mechanical properties was explored. Extrusion of 60 mm diameter Elektron 43 billets to 20 mm diameter rods (ER=9.92) was conducted at three temperatures (380°C, 420°C and 460°C) and a range of ram speeds (~0.1-15 mm/s). An approximate extrusion limit diagram was formed from empirical relations for extrusion load and hot cracking. Extruded microstructures were bi-modal consisting of dynamically recrystallised (DRX) grains and elongated deformed grains. The typical `prismatic' deformation texture (extrusion direction ED||) was weakened by increasing DRX fraction, concomitant of increased ram speed and temperature. Small DRX grains at low temperature/ram speed had very weak preferences for the 'RE component' with ED||. Increase in ram speed/temperature resulted in a rarely reported 'c-axis' RX texture (ED||) becoming increasingly prominent. This texture dominated at high temperatures and speeds. C-axis grains were larger than those of the RE and prismatic orientations, with the relative difference increasing with DRX fraction. Thus a growth advantage of c-axis grains has been demonstrated: it is postulated these grain boundaries have higher boundary mobility (considering the 90° misoreintation with the deformation texture) and driving pressure (as they are not well oriented for basal slip). Suppression of all RE texture modification followed extrusion at 460°C, 0.16 mm/s. The RX texture was typical of non-RE Mg alloys: ED||. It is argued that at this condition solute segregation is suppressed. Extrusions showed low ambient yield asymmetry. The highest measured yield stresses were correlated with partial RX. These two observations can be explained by a balance of texture, Hall-Petch strengthening and work hardening. One unexplained observation of note is that the maximum observed yields generally correspond to a reversed yield asymmetry.
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Books on the topic "Magnesium rare-earth alloys"

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Magnesium alloys containing rare earth metals: Structure and properties. London: Taylor & Francis, 2003.

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Rokhlin, L. L. Magnesium Alloys Containing Rare Earth Metals: Structure and Properties. Taylor & Francis Group, 2003.

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Rokhlin, L. L. Magnesium Alloys Containing Rare Earth Metals: Structure and Properties. Taylor & Francis Group, 2003.

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Yong, Ming Shyan. Process optimisation of squeeze cast magnesium-zinc-rare earth alloys and short fibre composites. 1999.

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Book chapters on the topic "Magnesium rare-earth alloys"

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Saji, Viswanathan S. "Rare-Earth Conversion Coatings." In Conversion Coatings for Magnesium and its Alloys, 185–98. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-89976-9_8.

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Easton, Mark, Serge Gavras, Mark Gibson, Suming Zhu, Jian-Feng Nie, and Trevor Abbott. "Hot Tearing in Magnesium-Rare Earth Alloys." In Magnesium Technology 2016, 123–28. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48114-2_25.

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Easton, Mark, Serge Gavras, Mark Gibson, Suming Zhu, Jian-Feng Nie, and Trevor Abbott. "Hot Tearing in Magnesium-Rare Earth Alloys." In Magnesium Technology 2016, 121–28. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119274803.ch25.

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Curtin, W. A., Rasool Ahmad, Binglun Yin, and Zhaoxuan Wu. "Design of Ductile Rare-Earth-Free Magnesium Alloys." In Magnesium Technology 2020, 19–24. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36647-6_5.

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Easton, Mark, Mark A. Gibson, Suming Zhu, Trevor Abbott, Jian-Feng Nie, Colleen J. Bettles, and Gary Savage. "Development of Magnesium-Rare Earth Die-Casting Alloys." In Magnesium Technology 2018, 329–36. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72332-7_50.

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Pastorek, Filip. "Biodegradable Magnesium Alloys with Aluminum, Lithium and Rare Earth Additions." In Magnesium and Its Alloys, 229–45. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, [2020] | Series: Metals and alloys: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045476-7.

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Yang, Zhiqing, and Hengqiang Ye. "Dislocations in Mg Alloys with Rare-Earth Element Addition." In Magnesium Technology 2018, 181–86. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72332-7_28.

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AbdelGawad, M., B. Mansoor, and A. U. Chaudhry. "Corrosion Characteristics of Two Rare Earth Containing Magnesium Alloys." In Magnesium Technology 2018, 43–53. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72332-7_9.

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Rokhlin, L. L. "Advanced Magnesium Alloys with Rare-Earth Metal Additions." In Advanced Light Alloys and Composites, 443–48. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9068-6_58.

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Javaid, A., F. Czerwinski, R. Zavadil, M. Aniolek, and A. Hadadzadeh. "Solidification Characteristics of Wrought Magnesium Alloys Containing Rare Earth Metals." In Magnesium Technology 2014, 197–202. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48231-6_39.

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Conference papers on the topic "Magnesium rare-earth alloys"

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pegnfei, fei, and chao zhang. "International trends analysis for subject of rare earth-magnesium alloys." In International Conference on Statistics, Data Science, and Computational Intelligence (CSDSCI 2022), edited by Grigorios N. Beligiannis. SPIE, 2023. http://dx.doi.org/10.1117/12.2656890.

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Rawles, Jessica, Svitlana Fialkova, Zhigang Xu, and Jagannathan Sankar. "Effect of Alloying Elements Concentration and Processing Parameters on the Structural and Mechanical Properties of Lightweight Magnesium Alloys." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24598.

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Abstract Magnesium is utilized as a light-weight metal in the aerospace and automotive industries, and recently draws a lot of attention in biomedical research due to its biodegradable and biocompatible properties [1–3]. With Zinc being a biocompatible element, magnesium-zinc alloys have been very attractive for such applications. Mechanical properties including yield strength, tensile strength and hardness values of magnesium alloys are reported to be improved with the adding of alloying elements such as Zn, Zr, Al, Y and some rare earth elements. In our study we observe the improvement of mechanical properties Vicker’s Hardness (VH) for Mg-Zn-Ca alloys with a fixed content of calcium and varying amounts of zinc alloying elements. Potential Outcome: Potentially new developed alloys could be used for lightweight materials for aerospace, automotive, and biomedical application.
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Aune, Terje Kr, Håkon Westengen, and Thomas Ruden. "The Effects of Varying Aluminum and Rare-Earth Content on the Mechanical Properties of Die Cast Magnesium Alloys." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1994. http://dx.doi.org/10.4271/940777.

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Basner, Timothy G., Mike Evans, and Daniel J. Sakkinen. "The Effect of Extended Time Aging on the Mechanical Properties of Vertical Vacuum Cast Aluminum-Manganese and Aluminum-Rare Earth Magnesium Alloys." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1993. http://dx.doi.org/10.4271/930419.

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McGhee, Paul, Devdas Pai, Sergey Yarmolenko, Jagannathan Sankar, Zhigang Xu, Sudheer Neralla, and Yongjun Chen. "Directional-Tribological Investigation of Magnesium Alloys Under As-Cast and Hot Extrusion Conditions." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51920.

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In recent years, magnesium (Mg) and its alloy are being studied for their potential use in orthopedic implants with the novel ability to biodegrade after the implant serves its therapeutic function. Pure Mg, by itself, would not be suitable for use in a load-bearing implant application, due to its high corrosion rate and poor tribological properties. However, through proper alloying, this degradable metal is capable of achieving good mechanical properties reasonably similar to bone, a retarded rate of corrosion and enhanced biocompatibility. Previous studies have shown that alloying Mg with aluminum, lithium, rare earth (RE), zinc (Zn), and calcium (Ca) result in lower corrosion rates and enhanced mechanical properties. Despite the growing popularity of Mg and it alloys, there is relatively little information in the literature on their wear performance. In this paper, we report on an investigation of the directional tribological properties of Mg and Mg-Zn-Ca-RE alloy fabricated via two different manufacturing processing routes: as-cast and hot-extruded after casting, with extrusion ratios of 10 and 50. Pure Mg was cast 350°C. After casting, Mg-Zn-Ca-RE alloy was heat-treated at 510°C. Another Mg-Zn-Ca-RE alloy was hot-extruded at 400°C. Dry sliding wear tests were performed on as-cast and hot-extruded pure Mg and Mg-Zn-Ca-RE alloys using a reciprocating test configuration. Wear rate, coefficient of friction and wear coefficient were measured under applied loads ranging from 0.5–2.5N at sliding frequency of 0.2 Hz for 120 cycles, using microtribometery. Wear properties of the extruded specimen were measured in cross-section and longitudinal section. In the longitudinal section studies, wear properties were investigated along the extrusion direction and the transverse direction. Hardness properties were evaluated using microindentation. Cross-section and longitudinal section were indented with a Vickers indenter under applied load of 2.94 N. Alloying and extrusion enhanced the mechanical properties significantly, increased hardness by 80% and wear resistance by 50% compared to pure Mg. Despite the low hardness in both Mg and the Mg alloy cross-sections, the cross-sections for both displayed higher wear resistance compared to the longitudinal section. In the longitudinal section, wear resistance was higher along the transverse direction of the longitudinal section for both Mg and the Mg alloy. The wear coefficient was used to evaluate how the wear behavior of the material varied with respect to alloying, fabrication process, and direction of wear. The wear coefficient of pure Mg decreased as the extrusion ratio increased, thus, increasing the specific wear rate. The opposite behavior was found in the Mg alloy: as the wear coefficient increases, the specific wear rate decreases. The active wear mechanisms observed on the worn surface of Mg were fatigue, abrasive, adhesive and delamination wear. The same wear mechanisms were observed in the Mg alloy except for fatigue wear. Surface microstructure and topographical characterization were conducted using optical microscopy, scanning electron microscopy mechanical stylus profilometry, and optical profilometry.
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Kumari, Meena, Priya Yadav, Shashank Nautiyal, and U. P. Verma. "Ab – initio study of rare earth magnesium alloy: TbMg." In 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5033036.

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Kumari, Meena, Suman Banger, Priyanka Rajpoot, and U. P. Verma. "Ab-initio study on ‘Zn’ doped rare earth magnesium alloy." In DAE SOLID STATE PHYSICS SYMPOSIUM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017368.

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JIANG, BIN, ZHIKUN QU, RUIZHI WU, and MILIN ZHANG. "EFFECTS EVALUATION FOR DIFFERENT RARE EARTH ELEMENTS IN MAGNESIUM-LITHIUM ALLOY." In Proceedings of the 6th International Conference on ICAMP. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814322799_0039.

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Wang, Yuqing, Haifeng Liu, Yingchun Guan, and Shilin Nie. "Biocompatibility enhancement of rare earth magnesium alloy by laser surface processing." In International Conference on Optical Instruments and Technology 2017: Advanced Laser Technology and Applications, edited by Liquan Dong, Chunqing Gao, Pu Wang, Zhiyi Wei, Franz X. Kärtner, and Jayanta Kumar Sahu. SPIE, 2018. http://dx.doi.org/10.1117/12.2291880.

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Moreno, Ian P., Keun Yong Sohn, J. Wayne Jones, and John E. Allison. "Bolt-Load Retention Behavior of a Die Cast Magnesium-Rare Earth Alloy." In SAE 2001 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-0425.

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