Bibliografie tematiche / Nickel-aluminum alloys

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Letteratura scientifica selezionata sul tema "Nickel-aluminum alloys"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 11 febbraio 2022

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Articoli di riviste sul tema "Nickel-aluminum alloys"

1

Al nefawy, Mohamad Yehea, Fouad El dahiye e Mahmoud Al Assaad. "The Effect of Heat Treatments and Nickel Additive on The Microstructure and Tensile Properties of 7075 Aluminum Alloy". Association of Arab Universities Journal of Engineering Sciences 27, n. 2 (30 giugno 2020): 154–61. http://dx.doi.org/10.33261/jaaru.2020.27.2.014.

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Abstract (sommario):
The aluminum alloys of the 7xxx series consist of Al with Zn mainly, Mg and Cu. 7xxx aluminum alloys has high mechanical properties making it distinct from other aluminum alloys. The effect of adding Nickel and heat treatments on the microstructure, formed phases and tensile properties of the 7075 aluminum alloy were studied in this paper. Different percentages of nickel [0.1, 0.5, 1] wt% was added to 7075 Aluminum alloy, and various heat treatments (artificial aging T6 and Retrogression and re-aging RRA) was applied on the 7075 alloys that containing nickel. The results obtained by applying of RRA treatment were better than the results of T6 treatment, the tensile properties increased and the microstructure became softer by adding nickel to the studied alloys. The maximum tensile strength of 7075 aluminum alloy was (UTS = 437 Mpa) when RRA heat treatment was applied and 0.5% nickel was added.
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Alasad, Mahmoud, e Mohamad Yahya Nefawy. "The Effect of Heat Treatments and Nickel Additive on The Microstructure and Hardness of 7075 Aluminum Alloy". مجلة جامعة فلسطين التقنية خضوري للأبحاث 7, n. 2 (15 settembre 2019): 34–41. http://dx.doi.org/10.53671/ptukrj.v7i2.76.

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Abstract (sommario):
The aluminum alloys of the 7xxx series consist of Al with Zn mainly, Mg and Cu. 7xxx aluminum alloys has high mechanical properties making it distinct from other aluminum alloys. In this paper, we examine the effect of adding Nickel and heat treatments on the microstructure and hardness of the 7075 aluminum alloy. Were we added different percentages of nickel [0.1, 0.5, 1] wt% to 7075 Aluminum alloy, and applied various heat treatments (artificial aging T6 and Retrogression and re-aging RRA) on the 7075 alloys that Containing nickel. By applying RRA treatment, we obtained better results than the results obtained by applying T6 treatment, and we obtained the high values of hardness and a smoother microstructure for the studied alloys by the addition of (0.5 wt%) nickel to alloy 7075.
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Alasad, Mahmoud, e Mohamad Yahya Nefawy. "The Effect of Heat Treatments and Nickel Additive on The Microstructure and Hardness of 7075 Aluminum Alloy". مجلة جامعة فلسطين التقنية للأبحاث 7, n. 2 (15 settembre 2019): 34–41. http://dx.doi.org/10.53671/pturj.v7i2.76.

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Abstract (sommario):
The aluminum alloys of the 7xxx series consist of Al with Zn mainly, Mg and Cu. 7xxx aluminum alloys has high mechanical properties making it distinct from other aluminum alloys. In this paper, we examine the effect of adding Nickel and heat treatments on the microstructure and hardness of the 7075 aluminum alloy. Were we added different percentages of nickel [0.1, 0.5, 1] wt% to 7075 Aluminum alloy, and applied various heat treatments (artificial aging T6 and Retrogression and re-aging RRA) on the 7075 alloys that Containing nickel. By applying RRA treatment, we obtained better results than the results obtained by applying T6 treatment, and we obtained the high values of hardness and a smoother microstructure for the studied alloys by the addition of (0.5 wt%) nickel to alloy 7075.
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Hernández-Méndez, F., A. Altamirano-Torres, José G. Miranda-Hernández, Eduardo Térres-Rojas e Enrique Rocha-Rangel. "Effect of Nickel Addition on Microstructure and Mechanical Properties of Aluminum-Based Alloys". Materials Science Forum 691 (giugno 2011): 10–14. http://dx.doi.org/10.4028/www.scientific.net/msf.691.10.

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Abstract (sommario):
In this work a comparative study between microstructure and mechanical properties of aluminum-nickel alloys with different contents of nickel was carried out. Alloys were produced by powders metallurgy. Characterization results indicates that the microstructure of the aluminum-nickel alloys present a thin and homogeneous distribution of an intermetallic compound in the aluminum’s matrix, identified as Al3Ni. Furthermore, it was find out that the amount of intermetallic Al3Ni increase as the nickel content in the alloy rises. Regarding the mechanical properties evaluated; it was establishes that the hardness, compression and flexion resistances also were improved due to the presence of the intermetallic compound.
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Saadeddine, S., J. F. Wax, B. Grosdidier, J. G. Gasser, C. Regnaut e J. M. Dubois. "Structure Factors of Binary Aluminum-Nickel and Ternary Aluminum-Nickel-Silicon Liquid Alloys". Physics and Chemistry of Liquids 28, n. 4 (dicembre 1994): 221–30. http://dx.doi.org/10.1080/00319109408030252.

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Ramunni, Viviana P. "Diffusion behavior in Nickel–Aluminum and Aluminum–Uranium diluted alloys". Computational Materials Science 93 (ottobre 2014): 112–24. http://dx.doi.org/10.1016/j.commatsci.2014.06.039.

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Khakimov, Iskandar B., Firuz A. Rakhimov, Izatullo N. Ganiev e Ziyodullo R. Obidov. "OXIDATION KINETIC AND ANODIC BEHAVIOR OF Zn22Al ALLOY DOPED WITH NICKEL". IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 64, n. 6 (15 maggio 2021): 35–40. http://dx.doi.org/10.6060/ivkkt.20216406.6368.

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Abstract (sommario):
The article presents the results of the study of the oxidation kinetics and the anodic behavior of the zinc-aluminum alloy Zn22Al, doped with nickel, in various corrosive environments. The kinetic and energy parameters of the process of high-temperature oxidation of alloys are determined. It is shown that the process of high-temperature oxidation of samples of Zn22Al-Ni alloys is characterized by a monotonic decrease in the true oxidation rate and an increase in the effective activation energy at the content of the alloying component in the initial Zn0.5Al alloy up to 0.5 wt.%. It was found that nickel additives within the studied concentration (0.01-0.5 wt.% ) slightly increases the oxidability of the base alloy Zn22Al at temperatures of 523, 573 and 623 K. It is shown that the dependence of the corrosion potential of zinc-aluminum alloys on the nickel content in them is of the same type, i.e. the additives of the alloying component contribute to the displacement of the corrosion potential in the region of positive values. The influence of the aggressiveness of the corrosive medium on the anodic behavior of alloys when comparing concentrated electrolytes with the increasing concentration of chloride ions in the sodium chloride solution is established. It is determined that the potentials of pitting formation and repassivation of the initial alloys shift to a more positive region with an increase in the nickel concentration in the alloys. The greatest shift of these potentials to the positive region is observed when alloying alloys containing small nickel additives. It is shown that the corrosion products of the studied alloys consist of a mixture of protective oxide films Al2O3, ZnO, NiO, Al2O3·ZnO and Al2O3·Ni2O3. It was found that the alloying of zinc-aluminum alloys with nickel (in the range of 0.01–0.05 wt.%) reduces the corrosion rate of the base alloy by 2-3 times. The proposed alloy compositions can be used as an anode coating for corrosion protection of steel products and structures.
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Taher, Abulmaali M. "Effect of Alloying Elements on the Hardness Property of 90% Copper-10% Nickel Alloy". Materials Science Forum 872 (settembre 2016): 13–17. http://dx.doi.org/10.4028/www.scientific.net/msf.872.13.

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Abstract (sommario):
The objective of this study is to investigate the effect of adding some alloying elements (including iron, aluminum, chromium, cobalt, and titanium) to 90 wt. % copper – 10 wt. % nickel alloy on the hardness property. Copper-nickel synthetic alloys were prepared in an induction furnace, in an argon/7% vol. hydrogen atmosphere in cylindrical boron nitride crucibles. They were then homogenized at 950°C for 10 hours in the same protective atmosphere. Vickers hardness measurements, microstructure examination, and Energy Dispersive Spectrometry (EDS) mapping analysis were performed for all synthetic alloys. Hardness measurements results show that the addition of all the alloying elements used in this investigation improve the hardness of the 90 wt. % copper – 10 wt. % nickel alloy. It was concluded that the aluminum was the most effective alloying element on the hardness value for 90 wt. % copper – 10 wt.% nickel alloy.
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Rybalka, Konstantin V., Luiza A. Beketaeva, Vyacheslav S. Shaldaev, Nataliya G. Bukhan’ko e Alexey D. Davydov. "Electrochemical Behavior of Nickel-Aluminum Alloys in Sodium Chloride Solutions". Advanced Materials Research 138 (ottobre 2010): 7–20. http://dx.doi.org/10.4028/www.scientific.net/amr.138.7.

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Abstract (sommario):
The anodic and cathodic reactions involved in the corrosion process on several nickel-aluminum alloys including two intermetallic compounds NiAl and Ni3Al in the NaCl solutions are studied. A procedure of pretreatment of test specimens and measuring the anodic and cathodic voltammograms is developed. It enabled us to obtain reproducible results including Tafel portions of voltammograms. The corrosion potentials Ecorr and corrosion currents icorr are determined by the coordinates of the intersection of anodic and cathodic Tafel plots. The dependences of Ecorr and icorr on the alloy composition (the content of nickel in the binary nickel-aluminum alloys), on the concentration of NaCl, and рН of unbuffered NaCl solutions with the additions of HCl or NaOH are determined. The anodic behavior of the alloys in a wide potential range is studied using the potentiodynamic method and the method of stepwise raising anodic potential with an exposure of electrode at each potential for a certain time. The dependences of pitting potential on the concentration of solution are determined for two intermetallic compounds.
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Huang, Yuan Sheng. "Nickel-Diamond Compound Electroless Plating on Cast Aluminum Alloys". Advanced Materials Research 189-193 (febbraio 2011): 265–68. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.265.

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Abstract (sommario):
In order to improve both the hardness and the erosion resistance of cast aluminum alloys, nickel-diamond compound coatings were deposited on the alloys by a compound electroless plating process. The morphology, phase structure, hardness, erosion resistance and adhesion of the electroless coating were investigated. The results show that the pretreatment such as removing the silicon in the surface of the alloys, zinc dipping, alkali electroless nickel is necessary. The deposition of an electroless nickel coating without diamond prior to nickel-diamond electroless plating can improves the erosion resistance. A best nickel-diamond compound electroless plating process is found. The hardness of the nickel-diamond compound coating reaches 730 HV. Both the adhesion and erosion resistance of the compound coatings are very good.
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Tesi sul tema "Nickel-aluminum alloys"

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Coulter, Robert A. "Alloying effects on high temperature deformation behavior of nickel aluminide intermetallics". Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1382.

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Abstract (sommario):
Thesis (M.S.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains xi, 94 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 88-89).
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Jamison, Jay Dee. "Modeling of thermal and mechanical effects during friction stir processing of nickel-aluminum bronze". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sep%5FJamison.pdf.

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Rosemark, Brian P. "Friction stir processing parameters and property distributions in cast nickel aluminum bronze". Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FRosemark.pdf.

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Abstract (sommario):
Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, December 2006.
Thesis Advisor(s): Terry R. McNelley, Srinivasan Swaminathan. "December 2006." Includes bibliographical references (p. 49-50). Also available in print.
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Williams, Robert A. "A microstructural and mechanical property correlation of friction stir processed nickel aluminum bronze". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sep%5FWilliams%5FR.pdf.

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Wall, James J. "Reactive thermomechanical processing of aluminide intermetallics /". free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p1418074.

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Anand, Thangaraj Joseph Sahaya. "Synthesis and microstructure of NixAl1-x (0.5 x 1) thin films". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29533363.

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Ternes, J. Kevin. "Visualization and simulation of defect structures in the B2 phase of NiAl". Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07212009-040437/.

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Afrin, Nasima. "An investigation of deformation behaviour and creep properties of micron sized Ni3Al columns". Thesis, Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37005467.

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Ma, Longzhou. "Effects of NiAl-[beta] precipitates on crack growth behavior in INCONEL alloy 783". Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2102.

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Abstract (sommario):
Thesis (Ph. D.)--West Virginia University, 2001.
Title from document title page. Document formatted into pages; contains xix, 233 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 223-233).
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Vailhe, Christophe N. P. "Planar fault energies and dislocation core spreadings in B2 NiAl /". This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-12172008-063647/.

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Libri sul tema "Nickel-aluminum alloys"

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Ellis, David L. Hot corrosion of the B2 nickel aluminides. [Washington, DC]: National Aeronautics and Space Administration, 1993.

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Guha, Sumit. Improving the low temperature ductility of NiAl. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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Ansari, Iqbal. Irradiation-Induced Creep and Microstructural Development in Precipitation-Hardened Nickel-Aluminum Alloys. Julich, W. Ger: Zentralbibliothek der Kernforschungsanlage, 1985.

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Dunning, J. S. Effect of aluminum additives on sulfidation resistance of some Fe-Cr-Ni alloys. Washington, DC: Dept. of the Interior, 1989.

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Dunning, J. S. Effects of Al additions on sulfidation resistance of some Fe-Cr-Ni alloys. Washington, D.C: Bureau of Mines, U.S. Dept. of the Interior, 1989.

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6

C, Deevi Seetharama, ASM International. Materials Science Critical Technologies. e ASM International. Specialty Materials Critical Technologies Sector., a cura di. International Symposium on Nickel and Iron Aluminides: Processing, Properties, and Applications: Proceedings from Materials Week '96, 7-9 October 1996, Cincinnati Convention Center, Cincinnati, Ohio. Materials Park, OH: ASM International, 1997.

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de, Villiers H. L., a cura di. The physics of creep: Creep and creep-resistant alloys. London: Taylor & Francis, 1995.

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Kozubski, Rafał. "Order-order" reactions in Ni₃Al-based intermetallic compounds with L1₂-type superstructure. Kraków: Wyd. Uniwersytetu Jagiellońskiego, 1996.

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Whittenberger, J. Daniel. Elevated temperature creep properties of NiAl cryomilled with and without Y₂O₃. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., a cura di. The influence of chromium on structure and mechanical properties of B2 nickel aluminide alloys. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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Capitoli di libri sul tema "Nickel-aluminum alloys"

1

Nowak, M., A. Kozik, M. Karas, S. Boczkal e M. Gawlik. "Nickel Coatings with Submicrometric Hard Ceramic Particles on Aluminum Alloys". In Light Metals 2015, 397–401. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093435.ch66.

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Nowak, M., A. Kozik, M. Karaś, S. Boczkal e M. Gawlik. "Nickel Coatings with Submicrometric Hard Ceramic Particles on Aluminum Alloys". In Light Metals 2015, 397–401. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48248-4_66.

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Pak, Han-ryong, Y. Horie e R. A. Graham. "Synthesis of Nickel-Aluminum Alloys by Shock Compression of Composite Particles". In Shock Waves in Condensed Matter, 761–66. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2207-8_111.

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Kang, Suk Bong, Dong Bae Kim e Jaehyung Cho. "Effect of Nickel Variation and Thermomechanical Treatment on Microstructure and Properties in Aluminum Alloy Fin Stock for Heat Exchanger". In ICAA13: 13th International Conference on Aluminum Alloys, 1719–25. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch257.

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Jellinek, J., e E. B. Krissinel. "Nickel-Aluminum Alloy Clusters: Structural and Dynamical Properties". In ACS Symposium Series, 239–54. Washington, DC: American Chemical Society, 1997. http://dx.doi.org/10.1021/bk-1997-0679.ch018.

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Stadler, Florian, Helmut Antrekowitsch, Werner Fragner, Helmut Kaufmann e Peter J. Uggowitzer. "The Effect of Nickel on the Thermal Conductivity of Al-Si Cast Alloys". In ICAA13: 13th International Conference on Aluminum Alloys, 137–42. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch21.

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Kang, Suk Bong, Dong Bae Kim e Jaehyung Cho. "Effect of Nickel Variation and Thermomechanical Treatment on Microstructure and Properties in Aluminum Alloy Fin Stock for Heat Exchanger". In ICAA13 Pittsburgh, 1719–25. Cham: Springer International Publishing, 2012. http://dx.doi.org/10.1007/978-3-319-48761-8_257.

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Byrne, P., e C. A. Pickles. "Oxidation of nickel-aluminum alloys". In High-Temperature Oxidation and Sulphidation Processes, 222–36. Elsevier, 1990. http://dx.doi.org/10.1016/b978-0-08-040423-3.50022-7.

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"Approximate Composition of Materials". In Extrusion, 567–77. 2a ed. ASM International, 2006. http://dx.doi.org/10.31399/asm.tb.ex2.t69980567.

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Abstract This appendix contains tables listing the approximate composition of materials for the extrusion process. The materials covered are aluminum alloys, magnesium and magnesium alloys, copper and copper alloys, cobalt alloys, nickel and nickel alloys, iron alloys, steels, lead, tin, zinc alloys, molybdenum, niobium, tantalum, zirconium alloys, titanium, and titanium alloys.
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"Tribological Properties of Stainless Steel and Other Corrosion-Resisting Metals". In Tribomaterials, 227–70. ASM International, 2021. http://dx.doi.org/10.31399/asm.tb.tpsfwea.t59300227.

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Abstract This chapter covers the tribological properties of stainless steel and other corrosion-resistant alloys. It describes the metallurgy and microstructure of the basic types of stainless steel and their suitability for friction and wear applications and in environments where they are subjected to liquid, droplet, and solid particle erosion. It also discusses the tribology of nickel- and cobalt-base alloys as well as titanium, zinc, tin, aluminum, magnesium, beryllium, graphite, and different types of wood.
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Atti di convegni sul tema "Nickel-aluminum alloys"

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Naeem, Haider T., Kahtan S. Mohammad, Jamaludin Shamsul B., Khairel R. Ahmad e Wan M. H. Hussein. "The properties of aluminum alloys containing nickel, produced using powder metallurgy method". In INTERNATIONAL CONFERENCE ON MATHEMATICS, ENGINEERING AND INDUSTRIAL APPLICATIONS 2014 (ICoMEIA 2014). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4915731.

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Degtyar, L. A., K. V. Ovchinnikova, I. Y. Zhukova e A. A. Kuts. "ANODIC PROCESSES DURING ELECTRODEPOSITION OF NICKEL, ITS ALLOYS AND COMPOSITE COATINGS". In INNOVATIVE TECHNOLOGIES IN SCIENCE AND EDUCATION. DSTU-Print, 2020. http://dx.doi.org/10.23947/itno.2020.185-188.

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The results of investigations of the anodic processes of electrodeposition of nickel, nickel-boron alloy, composite coatings nickel-ultrafine diamond and nickel-cobalt-aluminum oxide are presented. It was shown that the oxidation of the boron-containing additive occurs at potentials much more positive than the oxidation potential of nickel, which means that oxidation of the boron compound is impossible under real conditions of electrodeposition. During the electrodeposition of CEC, the anode process proceeds without any complications and the dissolution of the anodes occurs in the same way as in nickel-plating electrolytes, and the composite additives of UDD and Al2O3 do not affect the anodic processes.
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Manfredi, D., e F. Calignano. "Laser powder bed fusion of aluminum, titanium and nickel based alloys: Materials and design investigations". In 2017 International Conference on Electromagnetics in Advanced Applications (ICEAA). IEEE, 2017. http://dx.doi.org/10.1109/iceaa.2017.8065546.

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Smith, D. F., D. J. Tillack e J. P. McGrath. "A Low-Expansion Superalloy for Gas-Turbine Applications". In ASME 1985 Beijing International Gas Turbine Symposium and Exposition. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-igt-140.

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A high-strength, low-expansion alloy can greatly increase the efficiency of gas turbines by permitting decreased clearances between rotating and stationary parts. This paper describes development work on a series of nickel-iron-cobalt alloys having the desired combination of high strength and low thermal expansion. The first attempts to develop alloys of this type resulted in materials that required extensive thermomechanical processing and were susceptible to the phenomenon of stress-accelerated grain-boundary oxygen embrittlement (SAGBO). Further development resulted in INCOLOY alloy 909, the first low-expansion superalloy combining good resistance to SAGBO with high mechanical properties achieved without restrictive thermomechanical processing. Those substantial improvements were brought about by the addition of 0.3% to 0.6% silicon to a low-aluminum, 38% nickel, 13% cobalt, 1.5% titanium, 4.7% niobium (columbium), balance iron composition.
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Ro¨ttger, Karsten, Terry L. Jacobs e Gerhard Wilcke. "Deep Rolling Efficiently Increases Fatigue Life". In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63093.

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Deep rolling is a manufacturing process that efficiently increases the fatigue life of dynamically loaded components. It combines three effects to enhance fatigue strength, tribological properties and corrosion of a surface. Deep rolling: • Smoothes the surface; • Induces deep compressive stress in the surface zone; • Work-hardens the surface zone. The technology has developed into a modern, widely applicable process that improves part performance and achieves lightweight design. It has successfully been applied on stainless steels, alloy steels, brass, tool steels, nickel alloys, cast and ductile irons, aluminum, magnesium and titanium alloys [1,2,3].
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Fang, Ning. "Sensitivity Analysis of the Material Flow Stress in Machining". In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41655.

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Among the effects of strain hardening, strain-rate hardening, and temperature softening, it has long been argued about which effect is predominant in governing the material flow stress in machining. This paper compares four material constitutive models commonly employed, including Johnson-Cook’s model, Oxley’s model, Zerilli-Armstrong’s model, and Maekawa et al.’s model. A new quantitative sensitivity analysis of the material flow stress is performed based on Johnson-Cook’s model covering a wide range of engineering materials, including plain carbon steels with different carbon contents, alloyed steels, aluminum alloys with different chemical compositions and heat treatment conditions, copper and copper alloys, iron, nickel, tungsten alloys, etc. It is demonstrated that the first predominant factor governing the material flow stress is either strain hardening or thermal softening, depending on the specific work material employed and the varying range of temperatures. Strain-rate hardening is the least important factor governing the material flow stress, especially when machining aluminum alloys.
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7

Leylavergne, M., A. Grimaud, P. Fauchais, T. Chartier e J. F. Baumard. "PTA Reclamation of Cast Iron and Aluminum Alloys Substrate with NiCu Film Deposited by Tape Casting". In ITSC 1998, a cura di Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0373.

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Abstract Plasma transferred arc (PTA) is now currently used for reclamation of worn materials or to provide wear or corrosion resistant coatings welded to the base material. However, the powder injection in the molten pool created at the coated part surface is a critical parameter. In order to avoid coating reproducibility problems induced by the powder feed rate, the way to coat substrate surface with powder before the PTA treatment has been studied. As the powder cannot simply be deposited onto the substrate because of the plasma flow which would blow it off before melting it, tape casting process was used to obtain an adherent powder layer on the material surface. In this paper, tape casting of NiCu particles is described and the different organic additives used to obtain a homogeneous nickel copper film on cast iron and AG3 aluminum alloys are presented. The first results of the treatment of these films by PTA reclamation are then shown.
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8

Kirsch, Kathryn L., Mst Kamru Nahar e Mirna Urquidi-Macdonald. "Data Mining of General Corrosion of Most Commonly Used Alloys Using Kohonen Mapping". In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77841.

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This study was developed to provide an optimum method for designing metal alloys. Information on general corrosion of the most commonly used alloys, namely nickel-, iron-, aluminum-, stainless steel-, copper- and carbon-based alloys, was obtained from the National Institute of Standards and Technology (NIST). Parameters such as pH, temperature, conductivity, and composition of the electrolyte used in each experiment (alloy in contact with an environment), along with alloy composition (UNS) and corrosion rates, were collected. The parameters in the collected data were the electrolyte characteristics, the alloy composition, and the general corrosion rates. The data consisted of over 4000 samples. The next task was to cluster the data by similarities of the parameters. A web-based, publicly available Kohonen mapping software was used to perform the clustering analysis; the two dimensional Kohonen map was chosen. The map is composed of a number of cells on a plane of two dimensions and each cell stores a sample prototype representing that cell. Kohonen maps have the ability to preserve the topological properties of the data; i.e. samples with similar “high corrosion rates” will cluster together in a given cell of the map, while samples with “low corrosion rates” will cluster in a different cell, far apart from the cell storing the “high corrosion rates” samples. Once the Kohonen map is trained to cluster the samples by their corrosion rates, each one of the parameters of the samples (representing the electrolyte characteristics, the alloy composition and the general corrosion rates) is drawn as a function of the (X,Y) map position of the cell where the samples were stored. In this paper, we present the results obtained with nickel alloy data for which 1369 samples (or independent experiments) were collected.
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9

Hahnlen, Ryan, e Marcelo Dapino. "Joining of Shape Memory NiTi to Structural Materials Using Ultrasonic Soldering". In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1425.

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Shape memory nickel-titanium (NiTi) alloys can recover up to 8% of induced strain allowing such alloys to be used in the creation of solid-state actuators. Despite the unique properties of NiTi alloys, their implementation in structural applications is expensive, complex, and in some cases unfeasible due to limitations of traditional joining techniques. This research investigates the joining of NiTi to itself, aluminum 2024, O1 tool steel, and 304 stainless steel by Ultrasonic Soldering (USS), a process that can solder difficult to wet materials without the use of flux. The USS joints were evaluated through strength testing, optical microscopy, and maximum calculated von Mises equivalent stresses developed during testing. Lap shear tests show NiTi/NiTi, NiTi/aluminum 2024, NiTi/O1 tool steel, and NiTi/304 stainless steel USS joints have average ultimate shear strengths of 30.9 MPa, 53.8 MPa, 37.2 MPa, and 40.6 MPa, respectively.
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Ling, Julia, Erin Antono, Saurabh Bajaj, Sean Paradiso, Maxwell Hutchinson, Bryce Meredig e Brenna M. Gibbons. "Machine Learning for Alloy Composition and Process Optimization". In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75207.

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The drive for greater efficiency in turbomachinery has led to increasingly stringent specifications for the materials used. Current methods for optimizing alloy composition and processing to meet these requirements typically rely on a combination of expert judgment and trial and error. Machine learning offers an alternative approach that leverages data resources to significantly accelerate the optimization timeline through systematic data-informed decision making. In this paper, we demonstrate the effectiveness of machine learning methods for three different alloys classes: aluminum alloys, nickel-based superalloys, and shape memory alloys. In the first two alloy classes, models are built for the alloy mechanical properties based on the composition and processing information. In the case of shape memory alloys, a model is trained to predict the austenite to marten-site transformation temperatures. In addition to achieving high baseline performance, we leverage recent methodological developments to provide well-calibrated, heteroscedastic uncertainty estimates with each prediction. By wrapping these models in an inverse design routine that takes full advantage of uncertainty information, we are able to demonstrate the feasibility of designing new alloys to meet prescribed specifications. The results indicate that this approach has the potential to fundamentally change how new structural and functional alloys are developed.
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Rapporti di organizzazioni sul tema "Nickel-aluminum alloys"

1

Garner, F. A., e H. R. Brager. Swelling of copper-aluminum and copper-nickel alloys in FFTF-MOTA at approximately 450/sup 0/C. Office of Scientific and Technical Information (OSTI), giugno 1986. http://dx.doi.org/10.2172/5349021.

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Jellinek, J., e E. B. Krissinel. Nickel-aluminum alloy clusters -- structural and dynamical properties. Office of Scientific and Technical Information (OSTI), agosto 1997. http://dx.doi.org/10.2172/541878.

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Farfan, E., T. Labone, G. Staack, Y. Cheng, Y. Zhou e T. Varallo. DETERMINATION OF IN-VITRO LUNG SOLUBILITY AND INTAKE-TO-DOSE CONVERSION FACTOR FOR TRITIATED LANTHANUM NICKEL ALUMINUM ALLOY. Office of Scientific and Technical Information (OSTI), novembre 2011. http://dx.doi.org/10.2172/1057749.

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