Artykuły w czasopismach: „Mg-Li based alloys”

1

Sikdar, Koushik, Shashank Shekhar i Kantesh Balani. "Fretting wear of Mg–Li–Al based alloys". Wear 318, nr 1-2 (październik 2014): 177–87. http://dx.doi.org/10.1016/j.wear.2014.06.012.

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Jun, Joong Hwan, Ki Duk Seong, Jeong Min Kim, Ki Tae Kim i Woon Jae Jung. "Influence of Microstructural Change on Damping Capacity of Mg-X%Li Alloys". Materials Science Forum 539-543 (marzec 2007): 1764–68. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1764.

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The Effects of Li content and annealing treatment on microstructure and damping capacity for Mg-X%Li alloys have been investigated, based on experimental results from X-ray diffractometry (XRD), optical microscopy (OM), hardness tests and vibration damping tests in a flexural mode. The Mg-X%Li alloys containing Li of 3%, 8% and 13% consist of α (HCP) single phase, (α + β (BCC)) dual phases and β single phase, respectively. In as-rolled state, the damping capacity for Mg-Li alloys shows a similar level regardless of Li content. The annealing treatments at 200oC and 400οC give rise to an enhancement of damping capacity only for the Mg-3%Li and Mg-8%Li alloys containing α phase, and at the same annealing temperature, the Mg-3%Li alloy with fully α structure exhibits higher damping capacity. This result indicates that the damping capacity of Mg-Li alloys depends principally on α phase, and that the annealing treatment is necessary to improve its damping capacity.

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Król, Mariusz. "Solidification Characteristics of Mg-Li-Al Alloys". Solid State Phenomena 275 (czerwiec 2018): 41–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.275.41.

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The six Mg-Li and Mg-Li-Al alloys in as-cast state namely Mg-4.5%Li, Mg-9%Li, Mg-12%Li, Mg-4.5%Li-1.5%Al, Mg-9%Li-1.5%Al and Mg-12%Li-1.5%Al were prepared and analysed. These alloys have been subjected to the thermal analysis (thermal derivative-analysis and dilatometry study), and the subsequent thermal assessment, mechanical properties and microstructures were studied. The heating and cooling dilatometric curves characterise by a linear reduction (alloys with 12wt.% of Li) and linear increase (alloys with 4.5wt.% of Li) in coefficient of linear thermal expansion as a function of temperature. No transitions in the solid state occur. Based on results of thermal derivative analysis a crystallisation process of Mg-Li and Mg-Li-Al alloys was proposed. Addition of aluminium in ultra-light Mg-Li alloys shows considerably improved strengthening without a reduction in grain size. Increasing the lithium content causes in an increase of hardness.

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Okafor, Chiamaka, i Norman Munroe. "The Promise of Mg-Li Based Alloys for Biomedical Implant Materials". Materials Science Forum 1085 (20.04.2023): 139–48. http://dx.doi.org/10.4028/p-55j9e9.

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Lithium is an attractive element for Mg alloys for several reasons. It can improve room temperature ductility by transforming the single-phase hcp microstructure of Mg to a duplex phase followed by a single-phase bcc structure. With a solubility of ~5 wt.% Li, α-Mg is less prone to localized corrosion due to the absence of intermetallics. Furthermore, the strength of Mg-Li based alloys can be enhanced by alloying and thermomechanical processing. However, grain refinement has proven to be an effective mechanism in offsetting a compromise in ductility. It is for these reasons that Mg-Li based alloys have been the focus of great interest as a biomaterial where high strength, appreciable ductility and uniform corrosion behavior are required.

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Kumar, Vinod, Govind, Kempe Philippe, Rajiv Shekhar i Kantesh Balani. "Processing and Nano-mechanical Characterization of Mg-Li-Al based Alloys". Procedia Materials Science 5 (2014): 585–91. http://dx.doi.org/10.1016/j.mspro.2014.07.303.

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Cao, Dianxue, Xue Cao, Guiling Wang, Lin Wu i Zhanshuang Li. "Electrochemical discharge performance of Mg-Li based alloys in NaCl solution". Journal of Solid State Electrochemistry 14, nr 5 (2.06.2009): 851–55. http://dx.doi.org/10.1007/s10008-009-0865-7.

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Muga, C. O., i Z. W. Zhang. "Strengthening Mechanisms of Magnesium-Lithium Based Alloys and Composites". Advances in Materials Science and Engineering 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/1078187.

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Mg-Li based alloys are widely applied in various engineering applications. The strength of these alloys is modified and enhanced by different strengthening mechanisms. The strengthening mechanisms of these alloys and their composites have been extensively studied during the past decades. Important mechanisms applied to strengthening the alloys include precipitation strengthening, solution strengthening, grain and subgrain strengthening, and dislocation density strengthening. Precipitation and solution strengthening mechanisms are strongly dependent on composition of the alloys and thermal treatment processes, whereas grain and subgrain and dislocation density strengthening mechanisms majorly depend on thermomechanical processing. In this paper, recent studies on conventional processes for the strengthening of Mg-Li based alloys are summarized as they are critical during the alloys design and processing. Main strengthening mechanisms are objectively reviewed, focusing on their advantages and drawbacks. These can contribute to enhancing, initiating, and improving future researches for alloys design and suitable processing selection.

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Yoo, Hyo-Sang, Yong-Ho Kim i Hyeon-Taek Son. "Effect of Li on Mechanical Properties and Electrical Conductivity of the Al–Zn–Cu–Mg Based Alloys". Journal of Nanoscience and Nanotechnology 21, nr 9 (1.09.2021): 4897–901. http://dx.doi.org/10.1166/jnn.2021.19268.

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In this study, changes in the microstructure, mechanical properties, and electrical conductivity of cast and extruded Al–Zn–Cu–Mg based alloys with the addition of Li (0, 0.5 and 1.0 wt.%) were investigated. The Al–Zn–Cu–Mg–xLi alloys were cast and homogenized at 570 °C for 4 hours. The billets were hot extruded into rod that were 12 mm in diameter with a reduction ratio of 38:1 at 550 °C. As the amount of Li added increased from 0 to 1.0 wt.%, the average grain size of the extruded Al alloy increased from 259.2 to 383.0 µm, and the high-angle grain boundaries (HGBs) fraction decreased from 64.0 to 52.1%. As the Li content increased from 0 to 1.0 wt.%, the elongation was not significantly different from 27.8 to 27.4% and the ultimate tensile strength (UTS) was improved from 146.7 to 160.6 MPa. As Li was added, spherical particles bonded to each other, forming an irregular particles. It is thought that these irregular particles contribute to the strength improvement.

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Jiang, D. M., i B. D. Hong. "Deformation and fracture behavior of an Al-Li-Cu-Mg-Zr alloy 8090". Proceedings, annual meeting, Electron Microscopy Society of America 48, nr 4 (sierpień 1990): 974–75. http://dx.doi.org/10.1017/s0424820100178008.

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Aluminum-lithium alloys have been recently got strong interests especially in the aircraft industry. Compared to conventional high strength aluminum alloys of the 2000 or 7000 series it is anticipated that these alloys offer a 10% increase in the stiffness and a 10% decrease in density, thus making them rather competitive to new up-coming non-metallic materials like carbon fiber reinforced composites.The object of the present paper is to evaluate the inluence of various microstructural features on the monotonic and cyclic deformation and fracture behaviors of Al-Li based alloy. The material used was 8090 alloy. After solution treated and waster quenched, the alloy was underaged (190°Clh), peak-aged (190°C24h) and overaged (150°C4h+230°C16h). The alloy in different aging condition was tensile and fatigue tested, the resultant fractures were observed in SEM. The deformation behavior was studied in TEM.

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Klobes, Benedikt, Danny Petschke, Frank Lotter, Vasily Potapkin i Torsten E. M. Staab. "The Li stance on precipitation in Al–Li-based alloys: an investigation by X-ray Raman spectroscopy". Journal of Materials Science 57, nr 11 (marzec 2022): 6157–66. http://dx.doi.org/10.1007/s10853-022-07018-w.

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AbstractDecomposition and precipitation processes in a binary Al–Li alloy and a technical Al–Li–Cu–Mg alloy were investigated using differential scanning calorimetry and X-ray Raman spectroscopy (XRS). The formation of $$\delta $$ δ ’ and T1 precipitates in the Al–Li and the T8 heat-treated Al–Li–Cu–Mg alloy, respectively, was confirmed using DSC. The XRS measurements complemented by simulated spectra allowed for probing specifically Li and its environment within the Al matrix. Based on linear combination fits of the XRS spectra, the relative contributions of $$\delta '$$ δ ′ and T1 precipitates were quantified. These results are in agreement with estimates of the relative amount of Li taking part in the precipitation process. Difficulties and limitations of the application of XRS to Al alloy systems are also discussed.

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Becerra, A., i M. Pekguleryuz. "Effects of zinc, lithium, and indium on the grain size of magnesium". Journal of Materials Research 24, nr 5 (maj 2009): 1722–29. http://dx.doi.org/10.1557/jmr.2009.0205.

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The grain size of magnesium solid-solution alloys with lithium, indium, and/or zinc has been determined. Lithium, indium, and zinc additions decreased the grain size, D, of magnesium solid-solution alloys cast in a copper mold. The most effective grain refinement was obtained by zinc. In binary Mg–Zn alloys, grain size is related to the growth restriction factor, Q as D = 94 + 312/Q. In Mg–Li and Mg–In binary alloys, grain size versus growth relationships described as D = a + b/Q indicated that these alloys have lower numbers of nucleants but with higher potency than the Mg–Zn binary system. For Mg–Li and especially Mg–In, grain size could be related to growth restriction as D = 383Q−n with higher R2. Ternary and quaternary alloys based on Mg–Zn with Li and/or In additions also follow the D = a + b/Q relationship with the parameters indicating a larger number of lower potency nucleants than the Mg–Zn binary alloys. Electron probe microanalysis showed that Mg–Zn alloys exhibit pronounced and persistent grain-boundary enrichment of Zn, pointing toward Scheil solidification.

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Wang, Guan-Zhong, Yao Liu, De-Bin Ji, Ling-Yue Zhu, De-Qiang Ji, Dan-dan Yuan, Mi-Lin Zhang i Hong-Jun Wu. "Electrochemical preparation and properties of a Mg–Li–Y alloy via co-reduction of Mg(ii) and Y(iii) in chloride melts". RSC Advances 11, nr 23 (2021): 13839–47. http://dx.doi.org/10.1039/d1ra01349a.

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Kumar, Vinod, Govind, Rajiv Shekhar, R. Balasubramaniam i Kantesh Balani. "Microstructure evolution and texture development in thermomechanically processed Mg–Li–Al based alloys". Materials Science and Engineering: A 547 (czerwiec 2012): 38–50. http://dx.doi.org/10.1016/j.msea.2012.03.074.

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Wang, S. C., i M. J. Starink. "Precipitates and intermetallic phases in precipitation hardening Al–Cu–Mg–(Li) based alloys". International Materials Reviews 50, nr 4 (sierpień 2005): 193–215. http://dx.doi.org/10.1179/174328005x14357.

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Sun, Siqiang, Yingcai Pan, Guoqing Wu, Xuanbo Wang, Peng Zeng, Lijie Hei i Liqiang Wang. "Corrosion characteristics and protection of fiber metal laminates based on Mg-Li alloys". Materials Research Express 5, nr 9 (10.08.2018): 096517. http://dx.doi.org/10.1088/2053-1591/aad44d.

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Zhang, Lunyong, Yongjiang Huang, Ming Wu, Chao Xu, Zhiliang Ning, Fuyang Cao i Jianfei Sun. "Intermediate-Temperature Tensile Behavior of a Hot-Rolled Mg-Li-Al-Cd-Zn Alloy". Materials 15, nr 5 (24.02.2022): 1686. http://dx.doi.org/10.3390/ma15051686.

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Developing light structure materials that work stably at elevated temperatures is a long-standing challenge for many application fields, particularly in the development of aerospace equipment. Zn/Cd alloying elements were prospected to improve the stability of the lightest Mg-Li based alloys; however, little is known about the intermediate-temperature mechanical properties of such alloys. The present work investigated the tensile behaviors of a cold-rolled Mg-Li-Al-Cd-Zn alloy in a temperature range of 30–150 °C. The results indicate that the alloy can host a tensile strength σUTS of 108~121 MPa, a yield strength σYP of 97~109 MPa and elongation εB of 14–15 % at 150 °C, dependent on the tensile direction. The mechanical properties intensively are modulated by temperature through the competition between work hardening and softening. Work hardening due to dislocation blocking by the precipitated MgLi2X phase dominated the deformation at low temperatures, while softening that resulted from dynamic recrystallization was the main effect at high temperatures. Correspondingly, a quasi-cleavage mechanism dominated the fracture at temperatures near room temperature, and microvoid coalescence worked at high temperatures above 100 °C. Our results offer a new experimental understanding of the elevated-temperature mechanical behaviors of Mg-Li alloys and will advance the development of new light magnesium alloys with high stability.

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Ji, Yan-li, Tie Tao Zhou i Pei Ying Liu. "Thermodynamics-Based Constituent Design of Lithium Containing 7000 Series Aluminum Alloys". Materials Science Forum 475-479 (styczeń 2005): 325–28. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.325.

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The influence of Zn content and Zn/Mg ratio on the equilibrium phase amounts of major ageing strengthening phase η’ (MgZn2) in lithium containing 7000 series aluminum alloys has been investigated by means of thermodynamic calculations. The results show that, comparing with Li-free 7000 series aluminum alloys, Zn/Mg ratio is no longer the determinant for the amount of η’ and only increasing Zn content that can increase the amount of η’. And the results were discussed with existing experiments.

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Grydin, Olexandr, Mykhailo Stolbchenko, Mirko Schaper, Sára Belejová, Rostislav Králík, Lucia Bajtošová, Barbora Křivská, Michal Hájek i Miroslav Cieslar. "New Twin-Roll Cast Al-Li Based Alloys for High-Strength Applications". Metals 10, nr 8 (22.07.2020): 987. http://dx.doi.org/10.3390/met10080987.

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Al-Li based alloys are attractive materials for the aerospace industry. The twin-roll casting of such materials could provide properties not achievable by conventional direct-chill casting and downstream processing methods due to significantly higher solidification rates. An Al-Li-Cu-Mg-Zr alloy was twin-roll cast with the same alloy containing a small addition of Sc. The microstructure of as-cast materials and the influence of Sc on the behavior of the alloy at elevated temperatures were studied by means of light and electron microscopy and by resistivity measurements. A fine-grained structure was formed during twin-roll casting, but several surface and internal defects were found on the strips, which should be suppressed by a further adjustment of the casting conditions. The addition of Sc had a positive effect on grain size uniformity and microstructure stabilization at elevated temperatures, as shown by the precipitation of a fine dispersion of coherent Sc- and Zr-containing precipitates.

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Miyakita, Naoya, Natsuki Tanigaki, Taiki Morishige i Toshihide Takenaka. "Effect of Voltage on Mg-Li-Al Alloy Anodic Oxide Film". Materials Science Forum 941 (grudzień 2018): 1194–97. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1194.

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Anodic oxidation of Mg-Li-Al alloys using phosphoric acid-based bath were processed to obtain the corrosion-proof surface coating. The specimen oxidized at low voltage anodically dissolved without the formation of oxidized film. Anodic oxidation film could be formed at higher voltage due to thin layer preferentially formed on tthe active surface, this layer develops to stable thick film. There were no significant differences in film thickness between LA141 and LA143 alloys.

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Gao, Q., H. Zhang, R. Yang, Z. Fan, Y. Liu, J. Wang, X. Geng i in. "Effect of alloying elements on the stacking fault energies of dilute al-based alloys". Journal of Mining and Metallurgy, Section B: Metallurgy 54, nr 2 (2018): 185–96. http://dx.doi.org/10.2298/jmmb180107007g.

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A systematic study of the stacking fault energy (?SF) for the dilute Al-based alloys (Al23X, Al47X and Al71X, where X = Al, Ag, Be, Ca, Cd, Co, Cu, Cr, Fe, Ga, Ge, Hf, In, K, La, Li, Mn, Mg, Ni, Na, Pb, Sc, Sn, Sr, Si, Ti, V, Zn, and Zr) has been performed by means of first-principles calculations. Alias shear deformation is adopted in the present investigations. The presently calculated ?SF for Al is in favorable accordance with experimental and other theoretical data. For the targeted elements, the calculations indicate that Na, Si, K, Ca, Sc, Ga, Ge, Sr, Zr, In, Sn, La, Hf, and Pb, in any concentration we considered, decrease the ?SF of Al, while Ag, Be, Cd, Co, Cu, Cr, Fe, Li, Mn, Mg, Ni, Ti, V, and Zn increase the ?SF of Al, when the concentration of alloying elements is 1.39 at. % in the system. With increasing concentration of alloying elements, Li, Mg, V, Ti, and Cd change from increasing the ?SF of Al to decreasing it, based on present investigations. Among the alloying elements, which decrease the ?SF of Al, La decreases the ?SF most significantly. It is also found that the ?SF of Al-X generally decreases with the increase of equilibrium volume. The results obtained in the present work provide an insight into the design of Al based alloys.

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Wu, Liang, Yanchi Chen, Xianfeng Li, Naiheng Ma i Haowei Wang. "Rapid hardening during natural aging of Al-Cu-Li based alloys with Mg addition". Materials Science and Engineering: A 743 (styczeń 2019): 741–44. http://dx.doi.org/10.1016/j.msea.2018.11.119.

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WU, Li-bin, Xu-he LIU, Rui-zhi WU, Chong-liang CUI, Jing-huai ZHANG i Mi-lin ZHANG. "Microstructure and tensile properties of Mg–Li–Al–Zn based alloys with Ce addition". Transactions of Nonferrous Metals Society of China 22, nr 4 (kwiecień 2012): 779–85. http://dx.doi.org/10.1016/s1003-6326(11)61245-4.

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Ivanov, R., A. Deschamps i F. De Geuser. "Clustering kinetics during natural ageing of Al-Cu based alloys with (Mg, Li) additions". Acta Materialia 157 (wrzesień 2018): 186–95. http://dx.doi.org/10.1016/j.actamat.2018.07.035.

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Song, Jenn-Ming, Yi-Hua Lin, Chien-Wei Su i Jian-Yih Wang. "Mechanical Responses of Superlight β-Based Mg-Li-Al-Zn Wrought Alloys under Resonance". Metallurgical and Materials Transactions A 40, nr 5 (31.03.2009): 1026–30. http://dx.doi.org/10.1007/s11661-009-9819-z.

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Williams, D. B. "Aluminum-lithium alloys: A solution looking for a problem?" Proceedings, annual meeting, Electron Microscopy Society of America 50, nr 1 (sierpień 1992): 182–83. http://dx.doi.org/10.1017/s0424820100121314.

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For over a decade, Al-Li base alloys have been described as “the next generation of aerospace alloys”, although to date not much metal is actually flying. The addition of up to 3 wt. % (11 at.%) Li to Al results in decreased density (for obvious reasons) and increased modulus (for unknown reasons). This combination of decreased density and increased stiffness translates into millions of dollars saved in aircraft operation (whether military or civilian) and as a result the aerospace and aluminum industries have invested tens of millions of dollars in an attempt to produce commercial Al-Li based alloys. Electron microscopy and microanalysis have played a major role in the understanding of the physical metallurgy of these alloys, which have yet to see significant service. Their future is uncertain, although there is some limited use for alloys of Al-Li-Cu-Mg-Zr.

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Cheng, Yingwen, Yuyan Shao, Ji-Guang Zhang, Vincent L. Sprenkle, Jun Liu i Guosheng Li. "High performance batteries based on hybrid magnesium and lithium chemistry". Chem. Commun. 50, nr 68 (2014): 9644–46. http://dx.doi.org/10.1039/c4cc03620d.

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Fu, M. W., H. P. Yang, P. Chen, X. Zhang i G. C. Wang. "Study on the Enhanced Superplasticity of Mg-Li Based Alloy by a Stepped Deformation Method". Defect and Diffusion Forum 385 (lipiec 2018): 103–8. http://dx.doi.org/10.4028/www.scientific.net/ddf.385.103.

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A two-step deformation approach is proposed for the superplastic deformation (SPD) of Mg-9Li-1Al (LA91) alloy. This method has been successfully applied to titanium alloys and has induced enhanced superplasticity, and the feasibility of the method for the Mg-Li based alloy is explored. In a previous research, single-step SPD of LA91 alloy has been investigated, and the highest elongation of 563.7% was obtained by using the 8-pass equal channel angular extruded material, by the maximum strain rate sensitivity (Maxm) mode deformation. While in this research, the raw material in the as-extruded state is utilized. Constant velocity (Constv) and constant strain rate (CSR) modes are adopted for the first step of the deformation, respectively, with the elongation of the first step from 50% to 150%. The Maxm mode, in which the strain rate sensitivity m is always kept to be the maximum value, is applied to the second step. In addition, single-step tests by Constv, CSR and Maxm modes until fracture are conducted. The experimental temperature is 300°C, which was proved to be the optimum temperature for the SPD of this material in the previous research. The result shows that the 2-step method can greatly improve the superplasticity of the LA91 alloy, especially for the CSR mode deformation, and the maximum elongation obtained is 535.3%, by the CSR-Maxm mode, which is comparable to the optimum result in the previous research.

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OW, Abodunrin. "The Difference between the Chemical Short Range Orders of Binary Liquid Alloys Using Different Models". Physical Science & Biophysics Journal 5, nr 2 (2021): 1–6. http://dx.doi.org/10.23880/psbj-16000180.

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The thermodynamic models based on cluster of two and four atoms were considered to obtain the thermodynamic properties of liquid binary alloys. The four liquid alloys are candidates of homo-coordination / self-coordination. The values of chemical short range order, Concentration fluctuation and excess stability functions and the differences in models computed for Cu-Pb, Li-Mg, Cd-Ga and Bi-Cd binary liquid alloys are presented.

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El'cov, R. "DEVELOPMENT OF A TECHNOLOGICAL PROCESS FOR MANUFACTURING WELDED STRUCTURES". Construction Materials and Products 4, nr 5 (22.10.2021): 35–44. http://dx.doi.org/10.34031/2618-7183-2021-4-5-35-44.

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the main goal of this article is to obtain welded permanent joints of modern thermally hardened aluminum and aluminum-lithium alloys made by laser welding, having mechanical characteristics (temporary tensile resistance, yield strength, elongation at break) and structural-phase composition close to or equal to the base alloy. It is shown for the first time that by controlling the parameters of heat treatment of samples with a welded joint of all studied aluminum-lithium alloys, it is possible to purposefully influence the formation of the specified mechanical properties of the weld by changing the structural and phase composition of the weld. The evolution of the struc-tural and phase composition of welded joints of thermally hardened aluminum and aluminum-lithium alloys has been investigated using modern independent diagnostic methods: for the first time, the use of synchrotron radia-tion diffractometry in combination with high-resolution transmission, scanning electron and optical microscopy. The dependences of the increment of deformation under cyclic loading with amplitudes exceeding the elastic limit on temperature are established. For untreated welded joints, it was found that at +85 C, the inhomogeneity of the deformation increment increases, and its speed increases by 8 times for alloy 1461, 5 times for alloy 1420 and 1.5 times for alloy 1441. At a temperature of -60 0C, alloys 1420 and 1461 have hardening stages, during which the value of deformation decreases at given boundary stress values. At +20 0C, there is a uniform increment of defor-mation and an increase in the amplitude of deformation with an increase in the amplitude of stress. At +85 0C, the strain amplitude does not change with increasing stress amplitude, its value is 0.55-0.5 of the strain amplitude at +20 0C. Based on the research results, technological techniques have been developed that allow obtaining me-chanical characteristics and structural-phase compositions of welded joints close to the main alloy during laser welding of aviation thermally hardened aluminum and aluminum-lithium alloys of the Al-Mg-Cu. Al-Mg-Li, Al-Cu-Mg-Li, Al-Cu-Li systems.

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Liu, Xuan, Jilai Xue i Shizhe Liu. "Discharge and corrosion behaviors of the α-Mg and β-Li based Mg alloys for Mg-air batteries at different current densities". Materials & Design 160 (grudzień 2018): 138–46. http://dx.doi.org/10.1016/j.matdes.2018.09.011.

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Ji, Hao, Guohua Wu, Wencai Liu, Xiaolong Zhang, Liang Zhang i Mingxu Wang. "Origin of the age-hardening and age-softening response in Mg-Li-Zn based alloys". Acta Materialia 226 (marzec 2022): 117673. http://dx.doi.org/10.1016/j.actamat.2022.117673.

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Wu, Guoqing, Qingqing Zhang i Meijuan Zhang. "Progress in the research of super-light high-strength Mg-Li based alloys and composites". Procedia Engineering 27 (2012): 1257–63. http://dx.doi.org/10.1016/j.proeng.2011.12.580.

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Phasha, M. J., P. E. Ngoepe, H. R. Chauke, D. G. Pettifor i D. Nguyen-Mann. "Link between structural and mechanical stability of fcc- and bcc-based ordered Mg–Li alloys". Intermetallics 18, nr 11 (listopad 2010): 2083–89. http://dx.doi.org/10.1016/j.intermet.2010.06.015.

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Ablakatov, I. K., B. M. Baiserikov, M. B. Ismailov i M. R. Nurgozhin. "Aluminum-lithium alloys: types, properties, application, and production technologies. Overview". Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 323, nr 4 (23.05.2022): 5–14. http://dx.doi.org/10.31643/2022/6445.34.

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The article provides a brief overview of the aluminum industry development in Kazakhstan and the possibility of obtaining high-strength structural aluminum-lithium alloys. The country's enterprises produce aluminum of technical purity and aluminum alloys of low and medium strength of 6060, 6063, 6463, 6082, AK5M2, ADS-12, AD-31, AD-35, which are available materials for the construction industry. In Kazakhstan, there is progressive development of mechanical engineering which requires stronger alloys of 300-400 MPa, and for special engineering (defense, aerospace, and other advanced industries) - strengths above 415 MPa. High-strength structural aluminum alloys are based on Al-Cu-Mg, Al-Zn-Mg-Cu, Al-Li systems. Among these systems, relatively new Al-Li alloys are of great interest, having a great potential for further improvement of characteristics. The Al-Li system alloys with record-high specific strengths, corrosion-resistant, and good welded joints are widely used in the aerospace industry, where they are used for the production of power elements and housings. The article provides an overview of the known aluminum-lithium alloys, as well as the main technological stages of their production.

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Zhang, Mingquan, Jinghuai Zhang, Ruizhi Wu, Hongwei Cui, Ertuan Zhao, Shujuan Liu, Pengfei Qin i Qing Ji. "The Effect of Y/Er and Zn Addition on the Microstructure and Mechanical Properties of Mg-11Li Alloy". Materials 12, nr 19 (20.09.2019): 3066. http://dx.doi.org/10.3390/ma12193066.

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Although body-centered cubic (BCC) structural magnesium–lithium (Mg-Li) alloys have lower density and better formability than common hexagonal close-packed (HCP) Mg alloys, their applications remain limited due to their low strength. The purpose of this study is to investigate the effect of Y/Er and Zn addition on the microstructure and tensile properties of Mg-11Li alloy with a BCC structural matrix by comparing Mg-11Li, Mg-11Li-4Y-2Er-2Zn, and Mg-11Li-8Y-4Er-4Zn (wt %) alloys. The results indicate that the addition of Y/Er and Zn at a ratio of 3:1 cannot promote the formation of long-period stacking ordered structure in Mg-11Li alloy such as that in Mg-Y-Er-Zn alloys and the dominant intermetallic phases formed are BCC Mg24RE5 and face-centered cubic (FCC) Mg3RE2Zn3 phases. With an increase of the content of Y/Er and Zn in an as-cast alloy, the fraction of intermetallic particles increases and the grain size decreases. The addition of Y/Er, as well as Zn, dramatically promotes the refinement of dynamic recrystallization (DRX) during extrusion. The initial intermetallic phases induced by Y/Er and Zn addition are broken into relatively fine particles during extrusion, and this contributes to refining the dynamic recrystallized (DRXed) grains mainly by the particle stimulated nucleation mechanism. The as-extruded Mg-11Li-4Y-2Er-2Zn and Mg-11Li-8Y-4Er-4Zn alloys exhibit much higher tensile strength as compared with as-extruded Mg-11Li alloy, which is mainly ascribed to the refined DRXed grains and numerous dispersed intermetallic phase particles. It is suggested that further refinement of intermetallic particles in these extruded Mg-11Li-based alloys may lead to higher quality alloy materials with low density and excellent mechanical properties.

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Hao, Min, Liang Wang, Jun-Zhou Chen, Ren Wang i Guo-Ai Li. "Intrinsic Fatigue Crack Growth in Al-Cu-Li-Mg-Zr Alloys: The Effect of the Iron Constituent Particles". Metals 11, nr 1 (7.01.2021): 110. http://dx.doi.org/10.3390/met11010110.

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The influence of iron (Fe)-containing constituent particles on the behavior of fatigue crack initiation and propagation of Al-Cu-Li-Mg-Zr alloys has been studied using fatigue crack growth (FCG) tests and in-situ fatigue testing and detailed metallographic examination based on scanning electron microscopy. Experimental results show that the alloy with a low level of Fe content (2A97-T3 sheet) exhibited a lower density, accompanying equivalent tensile strength and FCG rate compared to the damage-tolerant 2524-T3 sheet. It was found that the fatigue b growth of both alloys is dominated by transgranular mode, accompanied by intergranular expansion, and the high level of Fe content alloy presents more characteristics of intergranular. Coarse constituent particles were detrimental to the resistance against FCG. It is postulated here that the micro-cracks formed around the coarse Fe-containing particles are merged with the primary crack to produce a bridging effect, accelerating the growth of fatigue cracks in the alloy with a high level of Fe content.

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Hao, Min, Liang Wang, Jun-Zhou Chen, Ren Wang i Guo-Ai Li. "Intrinsic Fatigue Crack Growth in Al-Cu-Li-Mg-Zr Alloys: The Effect of the Iron Constituent Particles". Metals 11, nr 1 (7.01.2021): 110. http://dx.doi.org/10.3390/met11010110.

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The influence of iron (Fe)-containing constituent particles on the behavior of fatigue crack initiation and propagation of Al-Cu-Li-Mg-Zr alloys has been studied using fatigue crack growth (FCG) tests and in-situ fatigue testing and detailed metallographic examination based on scanning electron microscopy. Experimental results show that the alloy with a low level of Fe content (2A97-T3 sheet) exhibited a lower density, accompanying equivalent tensile strength and FCG rate compared to the damage-tolerant 2524-T3 sheet. It was found that the fatigue b growth of both alloys is dominated by transgranular mode, accompanied by intergranular expansion, and the high level of Fe content alloy presents more characteristics of intergranular. Coarse constituent particles were detrimental to the resistance against FCG. It is postulated here that the micro-cracks formed around the coarse Fe-containing particles are merged with the primary crack to produce a bridging effect, accelerating the growth of fatigue cracks in the alloy with a high level of Fe content.

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Król, M., T. Mikuszewski, D. Kuc, T. Tański i E. Hadasik. "Thermal Assessment of Modified Ultra-Light Magnesium-Lithium Alloys". Archives of Metallurgy and Materials 62, nr 4 (1.12.2017): 2433–40. http://dx.doi.org/10.1515/amm-2017-0358.

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AbstractThe paper presents the results of the influence of commercial TiBor and AlSr10 master alloys on the refine the grains size, hardness and crystallisation process based on the thermal-derivation analysis of light cast magnesium-lithium-aluminium alloys. The effects of TiBor and AlSr10 content on the characteristic parameters of the crystallisation process of Mg-Li-Al alloys were investigated by thermal-derivative analysis (TDA). Microstructural evaluations were identified by light microscope, X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy.The results showed that the addition of TiBor master alloy reduced the grain size of Mg-9Li-1.5Al cast alloy from 900 μm to 500 μm, while the addition of AlSr10 master alloy reduced the grain size of investigated cast alloy from 900 μm to 480 μm. Moreover, an addition of TiBor and AlSr10 simultaneously reduced the grain size from 900 μm to 430 μm.Results from the thermal-derivative analysis showed that the addition of grain refinement causes a decrease in nucleation temperature and solidus temperature.

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Sun, Xiang, Senlin Leng, Hong Zhang, Zhenli He i Zhicheng Li. "Electrical properties and temperature sensitivity of Li/Mg modified Ni0.7Zn0.3O based ceramics". Journal of Alloys and Compounds 763 (wrzesień 2018): 975–82. http://dx.doi.org/10.1016/j.jallcom.2018.05.210.

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MUGA, Charles, Hao GUO, Yun ZOU, Songsong XU i Zhongwu ZHANG. "Effects of holmium and hot-rolling on microstructure and mechanical properties of Mg-Li based alloys". Journal of Rare Earths 34, nr 12 (grudzień 2016): 1269–76. http://dx.doi.org/10.1016/s1002-0721(16)60163-1.

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Li, C. Q., D. K. Xu, S. Yu, L. Y. Sheng i E. H. Han. "Effect of Icosahedral Phase on Crystallographic Texture and Mechanical Anisotropy of Mg–4%Li Based Alloys". Journal of Materials Science & Technology 33, nr 5 (maj 2017): 475–80. http://dx.doi.org/10.1016/j.jmst.2016.10.003.

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Ji, Qing, Xiaochun Ma, Ruizhi Wu, Siyuan Jin, Jinghuai Zhang i Legan Hou. "BCC-Based Mg–Li Alloy with Nano-Precipitated MgZn2 Phase Prepared by Multidirectional Cryogenic Rolling". Metals 12, nr 12 (8.12.2022): 2114. http://dx.doi.org/10.3390/met12122114.

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In this study, we deformed the single β phase Mg–Li alloy, Mg–16Li–4Zn–1Er (LZE1641), with conventional rolling (R) and multi-directional rolling (MDR), both at cryogenic temperature. Results showed that the nano-precipitation phase MgZn2 appeared in the alloy after MDR, but this phenomenon was not present in the alloy after R. The finite element simulation result showed that the different deformation modes changed the stress distribution inside the alloy, which affected the microstructures and the motion law of the solute atoms. The high-density and dispersively distributed MgZn2 particles with a size of about 35 nm were able to significantly inhibit the grain boundary migration. They further hindered the dislocation movement and consolidated the dislocation strengthening and fine-grain strengthening effects. Compared with the compressive strength after R (273 MPa), the alloy compressive strength was improved by 21% after MDR (331 MPa). After 100 °C compression, the MgZn2 remained stable.

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Sharma, Sachin Kumar, Kuldeep Kumar Saxena, Vinayak Malik, Kahtan A. Mohammed, Chander Prakash, Dharam Buddhi i Saurav Dixit. "Significance of Alloying Elements on the Mechanical Characteristics of Mg-Based Materials for Biomedical Applications". Crystals 12, nr 8 (12.08.2022): 1138. http://dx.doi.org/10.3390/cryst12081138.

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Magnesium alloys are widely employed in various applications due to their high strength-to-weight ratio and superior mechanical properties as compared to unalloyed Magnesium. Alloying is considered an important way to enhance the strength of the metal matrix composite but it significantly influences the damping property of pure magnesium, while controlling the rate of corrosion for Mg-based material remains critical in the biological environment. Therefore, it is essential to reinforce the magnesium alloy with a suitable alloying element that improves the mechanical characteristics and resistance to corrosion of Mg-based material. Biocompatibility, biodegradability, lower stress shielding effect, bio-activeness, and non-toxicity are the important parameters for biomedical applications other than mechanical and corrosion properties. The development of various surface modifications is also considered a suitable approach to control the degradation rate of Mg-based materials, making lightweight Mg-based materials highly suitable for biomedical implants. This review article discusses the various binary and ternary Mg alloys, which are mostly composed of Al, Ca, Zn, Mn, and rare earth (RE) elements as well as various non-toxic elements which are Si, Bi, Ag, Ca, Zr, Zn, Mn, Sr, Li, Sn, etc. The effects of these alloying elements on the microstructure, the mechanical characteristics, and the corrosion properties of Mg-based materials were analyzed. The mechanical and corrosion behavior of Mg-based materials depends upon the percentage of elements and the number of alloying elements used in Mg. The outcomes suggested that ZEK100, WE43, and EW62 (Mg-6% Nd-2% Y-0.5% Zr) alloys are effectively used for biomedical applications, having preferable biodegradable, biocompatible, bioactive implant materials with a lower corrosion rate.

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Yan, M. Y., F. Sun, X. P. Liu, J. H. Ye, H. P. Yuan, S. M. Wang i L. J. Jiang. "Experimental study on hydrogen storage properties of Li–Mg–N–H based tank". Journal of Alloys and Compounds 603 (sierpień 2014): 19–22. http://dx.doi.org/10.1016/j.jallcom.2014.03.054.

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Son, Hyeon-Taek, Yong-Ho Kim, Dae-Won Kim, Jung-Han Kim i Hyo-Sang Yu. "Effects of Li addition on the microstructure and mechanical properties of Mg–3Zn–1Sn–0.4Mn based alloys". Journal of Alloys and Compounds 564 (lipiec 2013): 130–37. http://dx.doi.org/10.1016/j.jallcom.2013.02.157.

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Fridlyander, I. N., O. E. Grushko, B. S. Denisov i V. A. Varganov. "The Die Forgings of High Corrosion Resistance, Wieldable, Super Light 1420 Aluminium Alloy". Materials Science Forum 519-521 (lipiec 2006): 973–78. http://dx.doi.org/10.4028/www.scientific.net/msf.519-521.973.

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The increase of weight efficiency and flight-technical characteristics of the aircraft engineering is presently the actual task, requiring the constant search for new materials. The aluminum alloys low density (< 2500 kg/m3) based on Al-Mg-Li system developed allowed to solve the problem of creating the pressurized sections of the aircraft airframe, where the basic semiproduct are die forgings 1420 alloy. The tensile mechanical properties, low cycle fatigue at axial loading (LCF), the critical stress intensity factor under plain strain (K1C), fatigue crack growth (FCGR) were determined in forgings of 1420 alloy and its weldments.

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Mendis, C. L., K. Oh-ishi, T. Ohkubo i K. Hono. "Effect of Li additions on the age hardening response and precipitate microstructures of Mg–2.4Zn–0.16Zr based alloys". Materials Science and Engineering: A 535 (luty 2012): 122–28. http://dx.doi.org/10.1016/j.msea.2011.12.051.

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Asadi, Hamid, Austin Duncan i Ramaraja Ramasamy. "Anti-Corrosive and Anti-Bacterial Polymeric Coatings Consisting of PCL and Lawsone". ECS Meeting Abstracts MA2022-02, nr 10 (9.10.2022): 681. http://dx.doi.org/10.1149/ma2022-0210681mtgabs.

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The clinical application of magnesium (Mg)-based alloys as biodegradable orthopedic implants is highly restricted because of their rapid corrosion rate in the physiological environment [1]. Polymeric coatings have been recognized as one of the most effective methods to tailor the corrosion rate of Mg alloys without changing their bulk properties, while providing them with other functionalities such as enhanced biocompatibility and antibacterial properties [2]. In this study, a bi-layered anti-corrosive polymeric coating based on polycaprolactone (PCL) and lawsone, a natural corrosion inhibitor extracted from the leaves of Lawsonia inermis plant, was fabricated on AZ31 Mg alloy to improve its corrosion resistance. The result of electrochemical and in vitro immersion studies clearly demonstrated the corrosion inhibitory effect of lawsone and the enhanced corrosion resistance of AZ31 alloy by almost two orders of magnitude (inhibition efficiency of 98.3%) after being coated with PCL-lawsone. Moreover, coated AZ31 substrates exhibited significantly hampered local alkalization and excessive H2 generation. Apart from the corrosion inhibition properties, incorporation of lawsone imparted a strong antibacterial activity to the coating, which is helpful in the prevention of microbial infection and early implant failure. While most of the commonly used corrosion inhibitors are known to be toxic and have limited biomedical applications, no cytotoxic effect was observed for lawsone-containing coating toward human fetal osteoblast cells (viability of > 85%). The findings of this work highlighted the great potential of lawsone as a natural corrosion inhibitor for fabrication of corrosion protective, antibacterial, and biocompatible coatings on Mg-based biodegradable implants. References Wang, Jia‐Li, et al. "Biodegradable magnesium‐based implants in orthopedics—a general review and perspectives." Advanced science 7.8 (2020): 1902443. Asadi, Hamid, et al. "A multifunctional polymeric coating incorporating lawsone with corrosion resistance and antibacterial activity for biomedical Mg alloys." Progress in Organic Coatings 153 (2021): 106157.

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Yang, Huabao, Liang Wu, Bin Jiang, Wenjun Liu, Jiangfeng Song, Guangsheng Huang, Dingfei Zhang i Fusheng Pan. "Clarifying the roles of grain boundary and grain orientation on the corrosion and discharge processes of α-Mg based Mg-Li alloys for primary Mg-air batteries". Journal of Materials Science & Technology 62 (styczeń 2021): 128–38. http://dx.doi.org/10.1016/j.jmst.2020.05.067.

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Ovsyannikov, Boris, Olga Chikova i Pavel Reznik. "The Study of Ingots and Deformed Semi-Finished Products of Al-Mg-Sc and Al-Cu-Li Alloys Using Diffraction Methods". Materials Science Forum 877 (listopad 2016): 471–76. http://dx.doi.org/10.4028/www.scientific.net/msf.877.471.

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The influence of Al-Mg-Sc ingots and Al-Cu-Li semi-finished products heat treatment modes on structure, phase composition, and crystal structure was studied. Based on EBSD and EDS data, the difference of the sample microstructures was detected and the most favorable annealing mode for further deformation was presumed.

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