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Zeitschriftenartikel zum Thema „FeAlO“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 18. Februar 2022

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1

Tikhov, S. F., Yu N. Bespalko, V. A. Sadykov, A. N. Salanov und S. I. Reshetnikov. „Catalytic oxidation of methane on CuO/Al2O3/FeAlO/FeAl cermet catalysts“. Combustion, Explosion, and Shock Waves 52, Nr. 5 (September 2016): 535–43. http://dx.doi.org/10.1134/s001050821605004x.

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2

We, J. H., S. J. Kim und C. S. Kim. „Magnetic Properties on Ferromagnetic FeAlO$_3$“. IEEE Transactions on Magnetics 42, Nr. 10 (Oktober 2006): 2876–78. http://dx.doi.org/10.1109/tmag.2006.880382.

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3

USOLTSEV, V., S. TIKHOV, A. SALANOV, V. SADYKOV, G. GOLUBKOVA und O. LOMOVSKII. „Properties of porous FeAlO y /FeAl x ceramic matrix composite influenced by mechanical activation of FeAl powder“. Bulletin of Materials Science 36, Nr. 7 (Dezember 2013): 1195–200. http://dx.doi.org/10.1007/s12034-013-0594-5.

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4

Shmorgun, V. G., A. I. Bogdanov, O. V. Slautin und V. P. Kulevich. „PHASE COMPOSITION OF OXIDE FILMS FORMED ON THE SURFACE OF THE FE-CR-AL SYSTEM COATINGS“. IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, Nr. 6(241) (29.06.2020): 14–18. http://dx.doi.org/10.35211/1990-5297-2020-6-241-14-18.

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The phase composition of the oxide films on the surface of the Fe-Cr-Al system coatings is studied using glancing angle X-ray diffraction. It is shown that at 900 °С the formed oxide films consist of αAlO and (FeCr)O, to which FeAlO oxide is added during long-term exposure. An increase in temperature to 1100 °C intensifies the growth of oxide films, and an increase in the aluminum content ensures a stable growth of αAlO and FeAlO oxides. When the aluminum content in the coating is more than 10 at. % at large exposure times, metastable alumina δAlO is formed, the formation of which is associated with a decrease in the concentration of chromium in thin surface layers.

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5

Villafuerte-Castrejón, Maria Elena, E. Castillo-Pereyra, A. Ayala-Morales, J. Tartaj, C. Moure, Pedro Durán, José Andrés Matutes-Aquino und L. Fuentes. „Synthesis of FeAlO₃ by Coprecipitation“. Key Engineering Materials 206-213 (Dezember 2001): 1405–8. http://dx.doi.org/10.4028/www.scientific.net/kem.206-213.1405.

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6

Rahmawan, Yudi, Eung Ryul Baek und T. H. Kim. „Interfacial Characteristics of Iron Aluminides Intermetallic Layers on Al-Coated Steel Sheet“. Advanced Materials Research 26-28 (Oktober 2007): 193–96. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.193.

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The characteristics of Al-coating materials on low carbon steel sheets during high temperature oxidation process were investigated. The phases’ evolution and growth were systematically evaluated by SEM/EDS and XRD. The hardness distribution from the surface to the steel substrate was measured to check the brittleness of iron aluminides coating layers. The oxidation properties of coating materials were investigated using weight gain method. Intermetallic compound recognized as FeAl3 was initially formed on the interface between steel substrate and coating materials. After exposing the specimens at elevated temperature, FeAl3 layer was gradually transformed into Fe2Al5, FeAl2, and FeAl+Fe3Al. Oxidation rate increased fastly after α-Al in the coating completely transformed at 650 °C. The brittle FeAl3 and Fe2Al5 have the lower resistance to oxidation because the easier cracking during intermetallic reaction.

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7

Mohn, Chris E., und Reidar G. Trønnes. „Iron spin state and site distribution in FeAlO 3 -bearing bridgmanite“. Earth and Planetary Science Letters 440 (April 2016): 178–86. http://dx.doi.org/10.1016/j.epsl.2016.02.010.

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8

Scherf, A., A. Kauffmann, S. Kauffmann-Weiss, T. Scherer, X. Li, F. Stein und M. Heilmaier. „Orientation relationship of eutectoid FeAl and FeAl2“. Journal of Applied Crystallography 49, Nr. 2 (24.02.2016): 442–49. http://dx.doi.org/10.1107/s1600576716000911.

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Fe–Al alloys in the aluminium range of 55–65 at.% exhibit a lamellar microstructure of B2-ordered FeAl and triclinic FeAl2, which is caused by a eutectoid decomposition of the high-temperature Fe5Al8 phase, the so-called ∊ phase. The orientation relationship of FeAl and FeAl2 has previously been studied by Bastin et al. [J. Cryst. Growth (1978), 43, 745] and Hirata et al. [Philos. Mag. Lett. (2008), 88, 491]. Since both results are based on different crystallographic data regarding FeAl2, the data are re-evaluated with respect to a recent re-determination of the FeAl2 phase provided by Chumak et al. [Acta Cryst. (2010), C66, i87]. It is found that both orientation relationships match subsequent to a rotation operation of 180° about a 〈112〉 crystallographic axis of FeAl or by applying the inversion symmetry of the FeAl2 crystal structure as suggested by the Chumak data set. Experimental evidence for the validity of the previously determined orientation relationships was found in as-cast fully lamellar material (random texture) as well as directionally solidified material (∼〈110〉FeAl || solidification direction) by means of orientation imaging microscopy and global texture measurements. In addition, a preferential interface between FeAl and FeAl2 was identified by means of trace analyses using cross sectioning with a focused ion beam. On the basis of these habit planes the orientation relationship between the two phases can be described by ({\overline 1}01)FeAl || (114)_{{\rm FeAl}_2}^{\rm Chumak} and [111]FeAl || [1\overline{1}0]_{{\rm Fe Al}_2}^{\rm Chumak}. There is no evidence for twinning within FeAl lamellae or alternating orientations of FeAl lamellae. Based on the determined orientation and interface data, an atomistic model of the structure relationship of Fe5Al8, FeAl and FeAl2 in the vicinity of the eutectoid decomposition is derived. This model is analysed with respect to the strain which has to be accommodated at the interface of FeAl and FeAl2.

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9

Haney, Richard L., Elizabeth B. Haney, R. Daren Harmel, Douglas R. Smith und Mike J. White. „Evaluation of H3A for Determination of Plant Available P vs. FeAlO Strips“. Open Journal of Soil Science 06, Nr. 11 (2016): 175–87. http://dx.doi.org/10.4236/ojss.2016.611017.

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10

Ma, Y. G., Y. Liu, C. Y. Tan, Z. W. Liu und C. K. Ong. „Magnetic anisotropy and high frequency permeability of multilayered nanocomposite FeAlO thin films“. Journal of Applied Physics 100, Nr. 5 (September 2006): 054307. http://dx.doi.org/10.1063/1.2337777.

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11

De, Chandan, Ángel M. Arévalo‐López, Fabio Orlandi, Pascal Manuel, J. Paul Attfield und Athinarayanan Sundaresan. „Isovalent Cation Ordering in the Polar Rhombohedral Perovskite Bi 2 FeAlO 6“. Angewandte Chemie International Edition 57, Nr. 49 (03.12.2018): 16099–103. http://dx.doi.org/10.1002/anie.201810122.

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12

Tao, Yong, Wenqin Zhang, Neng Li, Fazhou Wang und Shuguang Hu. „Atomic occupancy mechanism in brownmillerite Ca 2 FeAlO 5 from a thermodynamic perspective“. Journal of the American Ceramic Society 103, Nr. 1 (06.08.2019): 635–44. http://dx.doi.org/10.1111/jace.16711.

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13

Li, Lu-Lu, Yanqing Su, Irene J. Beyerlein und Wei-Zhong Han. „Achieving room-temperature brittle-to-ductile transition in ultrafine layered Fe-Al alloys“. Science Advances 6, Nr. 39 (September 2020): eabb6658. http://dx.doi.org/10.1126/sciadv.abb6658.

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Fe-Al compounds are of interest due to their combination of light weight, high strength, and wear and corrosion resistance, but new forms that are also ductile are needed for their widespread use. The challenge in developing Fe-Al compositions that are both lightweight and ductile lies in the intrinsic tradeoff between Al concentration and brittle-to-ductile transition temperature. Here, we show that a room-temperature, ductile-like response can be attained in a FeAl/FeAl2 layered composite. Transmission electron microscopy, nanomechanical testing, and ab initio calculations find a critical layer thickness on the order of 1 μm, below which the FeAl2 layer homogeneously codeforms with the FeAl layer. The FeAl2 layer undergoes a fundamental change from multimodal, contained slip to unimodal slip that is aligned and fully transmitting across the FeAl/FeAl2 interface. Lightweight Fe-Al alloys with room-temperature, ductile-like responses can inspire new applications in reactor systems and other structural applications for extreme environments.

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14

Kumamoto, Koki, Ikuo Shohji, Tatsuya Kobayashi und Muneyoshi Iyota. „Effect of Microstructure on Joint Strength of Fe/Al Resistance Spot Welding for Multi-Material Components“. Materials Science Forum 1016 (Januar 2021): 774–79. http://dx.doi.org/10.4028/www.scientific.net/msf.1016.774.

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The effects of welding conditions such as the electrode type and welding current were investigated on the microstructure and joint strength of the resistance weld of A5052 and GA590. The reaction layer formed at the joint interface was inferred to consist of Fe-Al based intermetallic compounds (IMCs) which are FeAl, FeAl2, Fe2Al5 and FeAl3 by quantitative analysis. Although the thickness of the IMCs layer decreased from the center of the nugget towards the edge of it. When the DR type electrode was used, the cross tensile force became higher than those of the joints formed with the R type one. This is because the thickness of the reaction layer formed at the nugget end of A5052 was thin in the case of the DR type electrode. Also, it was found that cross tensile force increases when the thickness of the reaction layer is thin by multiple regression analysis.

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15

Ali, Laila I., Sahar A. El-Molla, Nabil H. Amin, Anwer A. Ebrahim und Hala R. Mahmoud. „Effect of Ag-doping of nanosized FeAlO system on its structural, surface and catalytic properties“. Arabian Journal of Chemistry 9 (November 2016): S1242—S1251. http://dx.doi.org/10.1016/j.arabjc.2012.01.009.

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16

Majzlan, J., A. Navrotsky und B. J. Evans. „Thermodynamics and crystal chemistry of the hematite-corundum solid solution and the FeAlO 3 phase“. Physics and Chemistry of Minerals 29, Nr. 8 (01.09.2002): 515–26. http://dx.doi.org/10.1007/s00269-002-0261-7.

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17

Frąckowiak, J. E., Artur Hanc, Grzegorz Dercz, Lucjan Pająk und Boleslaw Formanek. „Mössbauer and XRD Studies on Composite Powder with Phases from Fe-Al System Obtained by Mechanically Activated SHS Mehtod“. Solid State Phenomena 130 (Dezember 2007): 185–88. http://dx.doi.org/10.4028/www.scientific.net/ssp.130.185.

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The systematic studies of non-stoichiometric phases from Fe-Al system obtained by selfpropagating high-temperature synthesis (SHS) were the aim of the present work. Investigations were performed using 57Fe transmission Mössbauer spectroscopy. The presence of nonsteichiomertic FeAl, FeAl2 and Fe2Al5 phases was found. It is can be concluded that the studied powder material is in non-equilibrium state. As the result of milling process the contents of FeAl phase increase whereas of FeAl2 and Fe2Al5 ones decrease. The determined crystal structure parameters and the hyperfine interaction parameters are presented and discussed.

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18

Badaruddin, Mohammad, und Chaur Jeng Wang. „Microstructure and High Temperature Oxidation of the Hot-Dipping Al-Si Coating on Low Carbon Steel in Ethanol, Water Vapor and Air at 700°C“. Advanced Materials Research 79-82 (August 2009): 1775–78. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1775.

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Low carbon steel was coated by hot-dipping into a molten Al-10%Si bath. The high-temperature oxidation was performed at 700oC for 1 h to 49 h in air, air +100% H2O, and air + 30% ethanol under atmospheric pressure. An elemental composition distribution, morphologies of the aluminide layer and the oxide scale were characterized by OM, XRD, and SEM/EDS. After hot-dipping treatment, the coating layers consisted of Al, Si, FeAl3, τ5-Fe2Al8Si, and Fe2Al5. The results of high temperature oxidation tests showed the oxidation rate were parabolic law in three different atmospheres. The polyhedral τ1-(Al,Si)5Fe3 formed at a short time oxidation completely transformed to FeAl2 and FeAl due to the composition gradient and the chemical diffusion. The effect of water vapor on the oxidation resistance of the Al-Si coating may be attributed to increase in Al and Fe ions transport, leading to loss of protective aluminide layer by formation of iron oxide nodules on the coating surface and at interface between aluminide layer and the steel substrate.

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19

Jing, Zhang, Qi Zhi Cao, Guo Hua Huang und Jin Li Huang. „Effect of Ni Addition on Formation of Nanocrystalline Phase during Mechanical Alloying of (Fe Al)-40(60) at.% Ni and (Fe Al₃)-10(30) at.% Ni Powders“. Applied Mechanics and Materials 275-277 (Januar 2013): 1814–17. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.1814.

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Al-Fe-Ni ternary powder mixtures containing (FeAl)-40(60) at.% Ni and (FeAl3)-10(30) at.% Ni were mechanically alloyed by a high-energry planetary ball mill. The structural evolution of the powders during milling was studied by X-ray diffraction technique (XRD). During milling of (FeAl)-40(60) at.% Ni system, Al and Fe solid solutions formed at the early stage change to FeAl, AlNi3 and FeNi3 intermetallic compounds. However, the Al and Fe solid solutions observed at the early stage transform into Al3Ni2, AlFe3 and AlFe0.23Ni0.77 intermetallic compound at last. The experimental results showed that the last milling products were decided by the proportion of atom between Al and Fe in the powder and the Ni content in the power had not affected to the last products.

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20

Romero-Romero, J. R., J. Luis López-Miranda, R. Esparza, M. A. Espinosa-Medina und G. Rosas. „Phase Evaluation and its Hydrogen Correlation of the FeAl₃ and FeAl₂ Intermetallic Alloys during Mechanical Ball-Milling with Water“. Materials Science Forum 793 (Mai 2014): 143–49. http://dx.doi.org/10.4028/www.scientific.net/msf.793.143.

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FeAl3 and FeAl2 intermetallic alloys composition was produced by conventional casting technique. Typically these intermetallic alloys are susceptible to hydrogen environment embrittlement. In this process, water vapor in the air induced cleavage fracture of intermetallic alloys. In order to take advantage of this phenomenon, we evaluate the embrittlement reaction during ball-milling of the pre-alloyed intermetallic material and water under different milling times. During the corrosion reaction, the amount of hydrogen releases was correlated to the amount of aluminum hydroxide formation. The obtained results were based on X-ray diffraction and scanning and transmission electron microscopy. It was observed that as the milling time increased the amount of hydrogen liberated is increased. The intermetallic FeAl3 the 72.95 wt. % reacted with water and the hydrogen release was 0.7769 L and is near the theoretical values that can be obtained.

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21

Lou, Jin, und Cheng Xiang Ruan. „Cyclic Oxidation Resistance of Hot-Dipping Aluminized Steel“. Materials Science Forum 852 (April 2016): 9–13. http://dx.doi.org/10.4028/www.scientific.net/msf.852.9.

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0Cr18Ni10Ti stainless steel was coated by hot-dipping in a molten aluminum bath, and then diffusing annealing at 950 °C for 2h. Aluminized steel was composed of three layers: outer layer FeAl2 phase and FeAl phase, intermediate layer FeAl phase, and inner solid solution with Al. The cyclic oxidation resistance of aluminized steel with outer layer and aluminized steel without outer layer were tested at 900 °C for 24 cycles using resistance furnace. Morphology, and phase composition, element distribution of the oxide scale were characterized by XRD, SEM and EDS. The oxidation result showed that weight loss on aluminized steel with outer layer was observed at early stage, weigh gain was obtained slowly at later stage, while the weight gain was observed on aluminized steel without outer layer during 24 cycles. The weigh gain of both samples was about 0.7mg/cm2 after 24 cycles. It was found that cracks on aluminized steel with outer layer were more than aluminized steel without outer layer due to thicker FeAl layer on aluminized steel with outer layer. A thin NiAl phase layer was found between FeAl layer and inner solid solution layer on both samples decrease the depletion rate of aluminum.

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22

Алтунин, Р. Р., Е. Т. Моисеенко und С. М. Жарков. „Структурные фазовые превращения при твердофазной реакции в двухслойной тонкопленочной наносистеме Al/Fe“. Физика твердого тела 62, Nr. 1 (2020): 158. http://dx.doi.org/10.21883/ftt.2020.01.48754.543.

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Phase formation processes at a solid state reaction between Fe and Al nanolayers were studied using in situ electron diffraction. The process of solid state reaction on the interface of the Fe and Al nanolayers was established to begin at ≈100 °C with the formation of a disordered solid solution of Al in a-Fe. It was shown that in the process of further heating, intermetallic phases of FeAl6 and/or Fe2Al5, FeAl, Fe3Al were successively formed.

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23

Ye, Hong, Shi Xin Peng, Zhong Lin Yan und Xiao Bin Zhang. „Microstructure and Properties of Laser Cladding Fe-Al Intermetallics“. Advanced Materials Research 659 (Januar 2013): 39–42. http://dx.doi.org/10.4028/www.scientific.net/amr.659.39.

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Fe-Al intermetallics coatings are prepared on an aluminum alloy ZL114A by laser cladding pure Fe and Al powders. The microstructure and hardness of the coatings are analyzed by using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and microhardness testing machines. The results show that a fine surface quality can be obtained under a suitable process parameter of laser. The laser cladding layers are mainly consisted of FeAl, FeAl3, Fe2Al5 and Fe3Al phases. The two cladding layers (60Fe-40Al, 90Fe-10Al) have high microhardness, which achieve HV520 and HV890.

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24

Hsieh, C. C., M. Y. Jian, H. W. Chang, X. G. Zhao und W. C. Chang. „Magnetic properties and high frequency characteristics of sputtered FeAl and FeAlB“. Journal of Physics: Conference Series 266 (01.01.2011): 012031. http://dx.doi.org/10.1088/1742-6596/266/1/012031.

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25

Lu, Chen Jing, Shu Xia Ren, Jian Lei Wang und Gang Yu. „Mechanism of Synthesizing Al₂O₃/Fe-Al Composites with Nano Al₂O₃ Fibers by In Situ Process“. Key Engineering Materials 562-565 (Juli 2013): 837–41. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.837.

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In-situ composite of Al2O3/Fe-Al with Al2O3 fibers were prepared by partial oxidation of oxygen to Fe powder and Al power, crystal phase composition and elemental composition were analyzed by XRD, NORAN. The results indicated that, the crystal composition is determined by Aluminum content, when the content is enough, FeAl3, Al and Al2O3 will be gain, on the contrary, Fe2Al, FeAl, Fe3Al and Al2O3 will be gain; Al2O3 fibers were synthesized via VLS process, the quantity of Al2O3 fibers increased with the Al content, the whisker’s diameter was improved with increasing of sintering temperature.

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26

Ye, Hong, Shi Xin Peng, Zhong Lin Yan und Xiao Bin Zhang. „Laser Cladding Fe-Al Intermetallics Coatings on ZL114A Aluminum Alloy“. Key Engineering Materials 531-532 (Dezember 2012): 208–11. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.208.

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The mixed powders of 70%Fe and 30%Al were precoated, and Fe-Al intermetallics coatings were produced on an aluminum ZL114A alloy by means of laser cladding. The microstructure and hardness of the coatings are analyzed by using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and microhardness testing machines. The results show that a fine surface quality can be obtained under a suitable process parameter of laser. The laser cladding layers are mainly consisted of phases of FeAl3, Fe3Al, FeAl with lump-like, granular, equiaxial and needle-like. The highest microhardness of the cladding layer achieved HV614 and raised 5~6 times in comparison to substrate.

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27

Zienert, Tilo, Andreas Leineweber und Olga Fabrichnaya. „Heat capacity of Fe-Al intermetallics: B2-FeAl, FeAl2, Fe2Al5 and Fe4Al13“. Journal of Alloys and Compounds 725 (November 2017): 848–59. http://dx.doi.org/10.1016/j.jallcom.2017.07.199.

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28

Wang, Haoren, Rui Kou und Kenneth S. Vecchio. „Design, fabrication and optimization of FeAl–FeAl2 eutectoid metallic-intermetallic laminate (MIL) composites“. Materialia 13 (September 2020): 100859. http://dx.doi.org/10.1016/j.mtla.2020.100859.

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29

Schmitt, A., K. S. Kumar, A. Kauffmann und M. Heilmaier. „Microstructural evolution during creep of lamellar eutectoid and off-eutectoid FeAl/FeAl2 alloys“. Intermetallics 107 (April 2019): 116–25. http://dx.doi.org/10.1016/j.intermet.2019.01.015.

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30

Li, Lulu, Irene J. Beyerlein und Weizhong Han. „Interface-facilitated stable plasticity in ultra-fine layered FeAl/FeAl2 micro-pillar at high temperature“. Journal of Materials Science & Technology 73 (Mai 2021): 61–65. http://dx.doi.org/10.1016/j.jmst.2020.09.018.

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31

Baddorf, A. P., und S. S. Chandavarkar. „Identification of an incommensurate FeAl2 overlayer on FeAl(110) using X-ray diffraction and reflectivity“. Physica B: Condensed Matter 221, Nr. 1-4 (April 1996): 141–44. http://dx.doi.org/10.1016/0921-4526(95)00916-7.

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32

Lutiyatmi, Lutiyatmi, und Tri Daryanto. „Pengaruh Proses Degassiing pada Peleburan Aluminium dengan Tungku Peleburannya“. Automotive Experiences 1, Nr. 03 (19.12.2018): 70–76. http://dx.doi.org/10.31603/ae.v1i03.2360.

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Porositas gas adalah salah satu masalah yang paling serius dalam pengecoran logam aluminium. Ada beberapa metode degassiing yang telah dipelajari dalam proses pengecoran. Selama peleburan aluminium, senyawa intermetalik (IMC) dapat dibentuk pada antarmuka antara aluminium cair dan baja padat dari lapisan tungku krusibel. Dalam penelitian ini, efek penambahan degassiing dari formasi IMC dipelajari dan diteliti. Spesimen uji berbentuk silinder direndam dalam bak aluminium cair. Perendaman spesimen uji berada di kisaran waktu antara 10 sampai 15 menit. Dua penggunaan degassiing yaitu degassiing garam dapur grasak dan degassiing Natrium Clorida (NaCl) dilakukan untuk menyelidiki efek pada pembentukan IMC. IMC itu diperiksa di bawah miskroskop elektron serta kekerasan IMC dengan mikrovickers hardness. Karena tingginya kandungan hidrogen, spesimen uji yang direndam dalam aluminium cair tanpa degasser memiliki lapisan IMC yang lebih tebal daripada yang lain. Proses degassiing NaCl lebih efektif daripada degassiing garam Grasak untuk mengurangi pertumbuhan IMC. Selanjutnya, fase yang muncul pada daerah IMC yaitu senyawa FeAl dan FeAl3 terbentuk pada spesimen dengan proses tanpa degassiing dan menggunakan degassiing NaCl.

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Iizuka, Takashi, und Ryo Itani. „Observation of Welded Interface of SPCC/A1100-O Tailored Blanks Made by Butt Laser Welding“. Key Engineering Materials 504-506 (Februar 2012): 405–10. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.405.

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Welding properties and formabilies of a tailored blank which consists of dissimilar metals are interesting because of the possible benefits for lightening of materials. Especially, the combination of mild steel and aluminum or aluminum alloy is expected as a representative of such a light hybrid material. Until now, some successful examples about welding of steel and aluminum using friction stir welding and laser roll welding have been reported. Recently, our research team has developed a butt laser welding method using CO2 laser. It was already confirmed that, by using this method, it was possible to obtain SPCC/A1100 O-tailored blanks with almost equal joint strength to the tensile strength of base aluminum. However, it has not been reported what was made in welded interfaces of the hybrid sheets. In this study, the welded interface of SPCC/A1100-O tailored blank obtained by butt laser welding was observed and analyzed using FE-SEM and EDS. Furthermore, fractured site in some formability tests were also observed, and it was identified where fracture occurred. In the experiments, the welded interface of steel/aluminum tailored blank, which has joint strength of 80MPa-90MPa, was observed. In the observation of low magnification, no clear intermetallic compound layers were seen. In the observation of higher magnification, it was confirmed that some intermetallic layers existed. From results of EDS analysis, it was indicated that this intermetallic compound layer consisted of FeAl3, Fe2Al5, FeAl, Fe2Al and Fe3Al. Thin Fe2Al5 layers of about 3 micro meters mainly existed between steel side and aluminum side. From this layer, some dendritic FeAl3 layers appeared into the aluminum side. In the steel side, relatively wide FeAl layers and Fe3Al layers were seen in turn. According to references, because welded sheet of steel and aluminum with good mechanical properties has intermetallic layers less than 4 micro meters, it was confirmed that butt laser welding method developed by our team had possibility to provide good steel/aluminum tailored blanks. In the fractured site by Erichsen test, Fe2Al5 layered were left in both steel side and aluminum side. Thus, it was indicated that a crack spread along the Fe2Al5 layer. From results of these experiments, it was confirmed that butt laser welding method developed by our team provided steel/aluminum tailored blanks with thin Fe2Al5 layers of about 3micro meters. And, it was indicated that this Fe2Al5 layer brought about early fracture.

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KAWASAKI, Toshisuke, Tatsuro ADACHI, Hiroaki OHFUJI und Yasuhito OSANAI. „FeAlO₃ under ultrahigh–temperature metamorphic conditions: Experimental evidence from the sillimanite–Fe₂O₃ and sillimanite–Fe₃O₄ systems“. Journal of Mineralogical and Petrological Sciences 114, Nr. 5 (2019): 238–51. http://dx.doi.org/10.2465/jmps.190509.

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Ren, Jiang Wei, Dong Li und Ai Dang Shan. „Interface Microstructure of Diffusion Bonded Fe₃Al/Al with Ultrafine Grain Layer“. Materials Science Forum 667-669 (Dezember 2010): 1171–75. http://dx.doi.org/10.4028/www.scientific.net/msf.667-669.1171.

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The influence of ultrafine grains produced by severe plastic deformation technology on the weldability of Fe3Al and Al dissimilar materials was investigated. An ultrafine grain layer was produced on Fe3Al intermetallic compound by surface mechanical attrition treatment. Then the SMATed Fe3Al was diffusion bonded with 1060Al at 550°C for 90 min in the vacuum of 10-3 Pa. The microstructures of surface ultrafine grain layer and transition zone at the interface of SMATed-Fe3Al/Al joint were observed by scanning electron microscopy. The grain size of surface ultrafine grains was characterized by X-ray diffractometry. The elements distribution at the interface and the phase constituents of transition zone were measured by energy disperse spectroscopy. The results showed that a deformed layer about 10-20 μm wide and surface nanocrystallines about 35nm were produced after 15 min surface mechanical attrition. SMATed Fe3Al was well bonded with Al and 11-30 µm wide transition zone formed. The transition zone consisted of FeAl and FeAl3 phases. The surface nanocrystallines helped the atom diffusion and the formation of diffusion bonded joint with rough surface and lower pressure.

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Li, Xiaolin, Anke Schmitt, Martin Heilmaier und Frank Stein. „The effect of the ternary elements B, Ti, Cr, Cu, and Mo on fully lamellar FeAl + FeAl2 alloys“. Journal of Alloys and Compounds 722 (Oktober 2017): 219–28. http://dx.doi.org/10.1016/j.jallcom.2017.06.106.

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Jiang, Tao. „Investigation of Phase Composition and Microstructure of the FeAl/Al₂O₃ Composites Fabricated by Mechanical Alloying and Plasma Active Sintering Process“. Advanced Materials Research 284-286 (Juli 2011): 226–29. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.226.

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The FeAl/Al2O3composites were fabricated by plasma active sintering process in this research. The FeAl intermetallics compounds powders were fabricated by mechanical alloying and heat treatment process. The FeAl intermetallics compounds powders and Al2O3powders were mixed and the FeAl/Al2O3composite powders were prepared. The FeAl/Al2O3composites bulks were fabricated by plasma active sintering process at 1200°C for 5min under the pressure of 30MPa. The phase composition and microstructure of the FeAl/Al2O3composites sintered bulks were investigated. The XRD patterns results showed that the Fe-Al intermetallics compounds powders were fabricated by mechanical alloying for 60h. The FeAl intermetallics compounds powders were fabricated by heat treatment at 800°C, 900°C and 1000°C. The microstructure showed that the mean particles size of the FeAl intermetallics compounds powders produced by mechanical alloying and heat treatment process was rather fine and about 4-5μm. The XRD patterns results showed that there existed the FeAl phase and Al2O3phase in the sintered composites. The FeAl/Al2O3composites sintered bulks exhibited the homogenous and compact microstructure. The microstructure of the FeAl/Al2O3composites became more compact and homogenous with the increase of FeAl content. The mean particles size of FeAl was about 2-3μm and the mean particles size of Al2O3was about 2-3μm. The density and relative density of the FeAl/Al2O3composites increased gradually with the increase of FeAl content.

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Jiang, Tao. „Investigation of Phase Composition and Microstructure of the FeAl/Al₂O₃ Composites Fabricated by Mechanical Alloying Process and Pressureless Sintering Process“. Advanced Materials Research 239-242 (Mai 2011): 968–71. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.968.

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The FeAl/Al2O3composites were fabricated by pressureless sintering process. The FeAl intermetallics compounds powders were fabricated by mechanical alloying and heat treatment process. The FeAl intermetallics compounds powders and Al2O3powders were mixed and the FeAl/Al2O3composite powders were prepared. The FeAl/Al2O3composites bulks were fabricated by pressureless sintering process at 1600°C for 2h. The phase composition and microstructure of FeAl intermetallics compounds powders produced by mechanical alloying and heat treatment were investigated. The phase composition and microstructure of the FeAl/Al2O3composites sintered bulks were investigated. The XRD patterns results showed that the Fe-Al intermetallics compounds powders were fabricated by mechanical alloying for 60h. The FeAl intermetallics compounds powders were fabricated by heat treatment at 800°C, 900°C and 1000°C. The microstructure showed that the mean particles size of the FeAl intermetallics compounds powders produced by mechanical alloying and heat treatment process was rather fine and about 4-5μm. The XRD patterns results showed that there existed the FeAl phase and Al2O3phase in sintered composites. The FeAl/Al2O3composites bulks exhibited the homogenous and compact microstructure. The mean particles size of FeAl was about 4-5μm and the mean particles size of Al2O3was about 5-10μm. The density and relative density of the FeAl/Al2O3composites increased gradually with the increase of FeAl content.

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Jiang, Tao. „Investigation of Phase Composition and Microstructure of the FeAl/Al₂O₃ Composites Fabricated by Mechanical Alloying and Hot-Pressing Process“. Advanced Materials Research 311-313 (August 2011): 323–26. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.323.

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The FeAl/Al2O3composites were fabricated by hot-pressing process in this research. The Fe-Al intermetallics compounds powders were fabricated by mechanical alloying and heat treatment. The FeAl powders and Al2O3powders were mixed and the FeAl/Al2O3composite powders were prepared. The FeAl/Al2O3composites bulks were fabricated by hot-pressing process at 1300°C for 2h under the pressure of 35MPa. The phase composition and microstructure of the FeAl intermetallics compounds powders produced by mechanical alloying and heat treatment were investigated. The phase composition and microstructure of the FeAl/Al2O3composites produced by hot-pressing process were investigated. The XRD patterns results showed that the Fe-Al intermetallics compounds powders were fabricated by mechanical alloying for 60h. The FeAl intermetallics compounds powders were fabricated by heat treatment at 800°C, 900°C and 1000°C. The microstructure showed that the mean particles size of the FeAl intermetallics compounds powders produced by mechanical alloying and heat treatment was rather fine and about 4-5μm. The XRD patterns results showed that there existed FeAl phase and Al2O3phase in sintered composites. The FeAl/Al2O3composites bulks exhibited the homogenous and compact microstructure. The mean particles size of FeAl was about 4-5μm and the mean particles size of Al2O3was about 4-5μm. The microstructure of the FeAl/Al2O3composites became more homogenous and compact with the increase of FeAl content.

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Jain, S., K. Chandra und V. Agarwala. „Microstructure and Mechanical Properties of Vacuum Hot Pressed P/M Short Steel Fiber Reinforced Aluminum Matrix Composites“. ISRN Materials Science 2014 (04.05.2014): 1–9. http://dx.doi.org/10.1155/2014/312908.

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Commercial purity aluminum powder of irregular shape and ligamental morphology having average particle size of 75 µm was blended with medium carbon steel short fibers having average diameter of 100 µm and maximum length up to 1000 µm. The green compacts of pure aluminum and reinforced compositions were hot-pressed in 10−3 torr vacuum, at 723 K, 773 K, and 823 K for 5, 10, and 15 min durations under 50 MPa axial stress on Gleeble 3800 simulator. Microstructures of the sintered composites have been studied by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX). The sintered compacts were characterized for densification behavior, hardness, and growth of FexAly reaction interface. Positive densification parameter was achieved for up to 10 wt.% reinforcement fraction. The maximum hardness of 51 Hv was achieved for 10 wt.% at 823 K for 15 min sintering time. The reaction interface was analysed by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX). The reaction interface was found to be composed of Fe3Al, FeAl2, Fe2Al, Fe3Al, Fe4Al, Fe2Al5, and FeAl intermetallics. Growth of the reaction interface was diffusion-controlled which followed a nearly parabolic law with a rate constant of 1.41 × 10−12 m2 s−1 at 823 K.

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Bozzi, S., A. L. Etter, T. Baudin, A. Robineau und J. C. Goussain. „Mechanical Behaviour and Microstructure of Aluminum-Steel Sheets Joined by FSSW“. Texture, Stress, and Microstructure 2008 (02.06.2008): 1–8. http://dx.doi.org/10.1155/2008/360617.

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At the prospect of a lightening of the automobile structures, welded spots have been realized on a stacking of two sheets (a 6008 aluminum alloy on steel) Friction Stir Spot welding (FSSW). Different process parameters have been tested, but only the influence of the dwell time will be described in the present paper. The dwell time corresponds to the time during which the probe stays in rotation at its bottom location before extracting. A study of the microstructures and textures associated to mechanical tests (tensile shear tests) allowed determining the best set of welding parameters. The recrystallized area around the welding spot has been characterized by electron back-scattered diffraction (EBSD). A mechanism of continuous dynamic recrystallization has been identified since the misorientation of subboundaries increases close to the weld, and this is for all the dwell times tested. Elsewhere, the increase of the dwell time induced a larger recrystallized zone. It has also been found that a long dwell time induced a larger welded area but also a higher quantity of intermetallic compounds (especially FeAl, Fe2Al7, and FeAl2) with high-microhardness values (up to 800 Hv). Thus, the dwell time must not exceed a certain value, otherwise it can weaken the weld.

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Purwanto, Sigit Edy, Mustakim Mustakim, Triyono Triyono und Nurul Muhayat. „PENGARUH WAKTU PENGELASAN TERHADAP REAKSI ANTARMUKA PADA SAMBUNGAN ALUMINIUM AL6061 DAN BAJA GALVANIS“. KURVATEK 4, Nr. 2 (21.12.2019): 25–36. http://dx.doi.org/10.33579/krvtk.v4i2.1147.

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AbstrakBahan bakar merupakan kebutuhan yang sangat penting bagi alat transportasi. Saat ini, cadangan bahan bakar fosil semakin berkurang. Untuk menghemat bahan bakar diperlukan alat transportasi yang ringan. Konstruksi yang ringan dapat diperoleh dengan menggabungkan dua atau lebih jenis material. Jenis sambungan yang sesuai untuk mendapatkan konstruksi yang ringan adalah sambungan las. Penelitian ini bertujuan untuk mengetahui sifat mampu las antara baja galvanis dengan aluminium Al6061. Metode pengelasan yang digunakan adalah Resistance Spot Welding (RSW). Sifat mampu las dari kedua material dapat diketahui dari jenis senyawa intermetalik yang terbentuk pada antarmuka lasan. Hasil penelitian ini menunjukkan bahwa reaksi antarmuka yang terbentuk untuk waktu pengelasan 4 dan 5 siklus adalah senyawa intermetalik FeAl dengan ketebalan masing-masing 19,25 μm dan 10,52 μm, untuk waktu pengelasan 6 siklus adalah senyawa intermetalik FeAl3 dengan ketebalan 8,07 μm. Kekeraran tertinggi 623,1 HV0.1 dan kekerasan terendah 572,2 HV0.1. Kata kunci: Aluminium Al6061, Baja Galvanis, RSW, Senyawa Intermetalik AbstractFuel is a very important in transportation. Unfortunately, the amount of fossil fuel reserve is decreasing. Using lightweight material for vehicle is one way to save fossil fuel. Lightweight construction can be obtained by combining two or more types of material. The right type of connection to get a lightweight construction is a welded joint. This study aimed to determine the properties of weldability between galvanized steel and aluminum Al6061. The welding method used was Resistance Spot Welding (RSW). The weldability of the two materials could be seen from the types of intermetallic compounds formed at the weld interface. The results of this study indicated that the formed interface reaction was FeAl intermetallic compound layer with a thickness of 19,25 μm and 10,52 μm respectively for 4 and 5 cicles of welding time, and FeA3 intermetallic compound layer with a thickness of 8,07 μm for 6 cycles of the welding time The highest hardness was 623.1 HV0.1 and the lowest hardness was 572.2 HV0.1. Keywords: Aluminum, Galvanized Steel, RSW, Intermetallic Compound

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Caba, Anton Mac. „Feall ar fheall: Dúnmharú Martin O'Hagan: Feall an LVF agus Feall na Meán Cumarsáide“. Comhar 61, Nr. 11 (2001): 7. http://dx.doi.org/10.2307/25574292.

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Jiang, Tao. „Investigation of Phase Composition and Microstructure of the FeAl Intermetallics Compounds Bulks Fabricated by Mechanical Alloying Process and Hot-Pressing Process“. Advanced Materials Research 228-229 (April 2011): 899–904. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.899.

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The FeAl intermetallics compounds bulks were fabricated by hot-pressing process. The FeAl intermetallics compounds powders were fabricated by mechanical alloying and heat treatment process. The phase composition and microstructure of the FeAl intermetallics compounds powders produced by mechanical alloying and heat treatment were investigated. The phase composition and microstructure of the FeAl intermetallics compounds bulks fabricated by hot-pressing process were investigated. The XRD patterns results showed that the Fe-Al intermetallics compounds powders were fabricated by mechanical alloying for 60h. The FeAl intermetallics compounds powders were fabricated by heat treatment process at 800oC, 900oC and 1000oC. The microstructure showed that the mean particles sizes of the Fe-Al intermetallics compounds powders produced by mechanical alloying decreased remarkably with the increase of milling time. The microstructure showed that the mean particles size of the Fe-Al intermetallics compounds powders produced by mechanical alloying and heat treatment was rather fine and about 4-5μm. The FeAl intermetallics compounds bulks were fabricated by hot-pressing process at 1100oC for 2h under the pressure of 35MPa. The XRD patterns results showed that there existed the FeAl intermetallics compounds phase in sintered bulks. The FeAl intermetallics compounds bulks exhibited the homogenous and compact microstructure. The mean particles size of the FeAl intermetallics compounds was about 2-3μm. The FeAl intermetallics compounds bulks exhibited the high relative density. The FeAl intermetallics compounds bulks with the high relative density were fabricated by hot-pressing process.

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Shmorgun, Victor Georgievich, Artem I. Bogdanov und Vitaliy P. Kulevich. „Formation of Intermetallic Coating on 20880 Steel in the Liquid-Phase Inter-Reaction with Aluminum“. Solid State Phenomena 299 (Januar 2020): 914–19. http://dx.doi.org/10.4028/www.scientific.net/ssp.299.914.

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The inter-reaction mechanism of ingot iron with a molten aluminum is proposed and experimentally confirmed. It is shown that the three-layer coating is formed on the surface of ingot iron under the conditions of liquid-phase inter-reaction and consists of bund interlayers of Fe2Al5 and FeAl3 intermetallics and a heterogeneous structure based on solid solution and FeAl3. The micro-hardness of the structural components of the heterogeneous structure ranges from 1 (for Al (Fe)) to 6–9 GPA (for FeAl3+Al (Fe)). An increase in the exposure time during the heat treatment is accompanied by an increase of the quantity of structurally free FeAl3+Al (Fe) fragments in its composition.

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Wang, Hong Tao, Ruo Yu Wang, Xiao Chen, Xiao Bo Bai, Zeng Xiang Dong und Gang Chang Ji. „Characterization of Cold-Sprayed FeAl/WC Nanocomposite Coating“. Applied Mechanics and Materials 423-426 (September 2013): 63–66. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.63.

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A FeAl/WC nanocomposite coating was produced by cold spraying of mechanically alloyed Fe/Al/WC composite powder assisted with annealing treatment. The microstructure and grain size of FeAl/WC nanocomposite coating before and after annealing treatment were characterized. The results indicated that as-sprayed Fe (Al)/WC nanocomposite coating presented a dense microstructure with lamellar structure. The phase transformation from Fe (Al) solid solution to FeAl intermetallics within as-sprayed nanocomposite coating occurred when annealed at 550°C for 25 h. The annealed nanocomposite coating was composed of nanograins of size ranging from 50-100 nm and the grain size of FeAl increased with increasing the annealing time. Moreover, the effect of annealing temperature on the microstructure of the FeAl/WC nanocomposite coating was investigated.

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Sé, Breandán Ó., und Máirtín Ó. Corrbuí. „Fuath agus Feall“. Comhar 56, Nr. 1 (1997): 34. http://dx.doi.org/10.2307/25573192.

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Su, Shan, Shujun Chen, Yu Mao, Jun Xiao, Anupam Vivek und Glenn Daehn. „Joining Aluminium Alloy 5A06 to Stainless Steel 321 by Vaporizing Foil Actuators Welding with an Interlayer“. Metals 9, Nr. 1 (05.01.2019): 43. http://dx.doi.org/10.3390/met9010043.

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Direct aluminium–stainless steel joints are difficult to create by the vaporized foil actuator welding (VFAW) method because brittle intermetallic compounds (IMCs) tend to form along the interface. The use of an interlayer as a transition layer between the two materials with vast difference in hardness and ductility was proposed as a solution to reduce the formation of the IMCs. In this work, VFAW was used to successfully weld sheet aluminium alloy 5A06 to stainless steel 321 with a 3003 aluminium alloy interlayer. Input energy levels of 6 kJ, 8 kJ, 10 kJ, and 12 kJ were used and as a trend, higher energy inputs resulted in higher impact velocities, larger weld area, and better mechanical properties. In lap-shear and peel testing, all samples failed at the interface of the interlayer and target. At 10 kJ energy input, flyer velocities up to 935 m/s, lap-shear peak load of 44 kN, and peel load of 2.15 kN were achieved. Microstructure characterization and element distribution were performed, and the results show a wavy pattern created between the flyer and interlayer which have similar properties, and the interface between the interlayer and target was dominated by element diffusion and IMCs identified mainly as FeAl3 and FeAl. The results demonstrate VFAW is a suitable joining method for dissimilar metals such as aluminium alloy and stainless steel, which has a broad and significant application prospect in aerospace and chemical industry.

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Tang, Tao, Yi Liu, Qun Li, Jiang Li Cao, Yu Zhe Liu, Helen W. L. Chan und Yu Wang. „DC Magnetron Sputtering of B2 Phase Feal(111) Single-Crystal-Like Films and Hydrogen Damage Behavior“. Advanced Materials Research 853 (Dezember 2013): 131–34. http://dx.doi.org/10.4028/www.scientific.net/amr.853.131.

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B2 ordered FeAl intermetallic is an important candidate for high-temperaturestructural materials, and its hydrogen embrittlement problem has attracted wide attentions in recent decades. In this paper, we prepared single-crystal-like B2-FeAl (111) thin films on Si (111) substrate using the conventional magnetron sputtering method, and studied the phase composition and the influences of hydrogen on FeAl (111) films by X-ray diffraction (XRD), scanning electron microscopy (SEM), Atomic force microscope (AFM) and transmission electron microscope (TEM) analysis. The preffered growth mechanism of FeAl (111) film and its hydrogen induced modification were discussed.

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Kryder, M. H., S. Wang und K. Rook. „FeAlN/SiO2and FeAlN/Al2O3multilayers for thin‐film recording heads (invited)“. Journal of Applied Physics 73, Nr. 10 (15.05.1993): 6212–17. http://dx.doi.org/10.1063/1.352702.

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