EventsThe 4th International Online Conference on Crystals
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This submission belongs to the session S7. Crystalline Metals and Alloys of the event The 4th International Online Conference on Crystals
Published date
18 Sep, 2024
Academic Editor
author-avatarPetrica Vizureanu
Citation
Galina Kuzmicheva, Andrey Dolgov, Ivan Pavlov, Experimental and Computational Methods for Determining the Composition of Commercial Titanium and Aluminum Alloys, in Proceedings of The 4th International Online Conference on Crystals, 18 September–20 September 2024, MDPI: Basel, Switzerland
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Experimental and Computational Methods for Determining the Composition of Commercial Titanium and Aluminum Alloys

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Galina Kuzmicheva 1
Andrey Dolgov 2
Ivan Pavlov 3
1. MIREA - Russian Technological University, Russia
2. MIREA - Russian Technological University, Vernadsky pr., 78, Moscow, 119454, Russian Federation, Russia
3. Kurchatov Complex of Crystallography and Photonics, National Research Center "Kurchatov Institute", Leninsky pr., 59, Moscow, 119333, Russian Federation, Russia
Abstract

Commercial alloys of Al-1 (wt.%) (91.9 -94.6Al, 4.8-5.8Mg, 0.5 Si =Fe, 0.1Cu, 0.05-0.08Mn, 0.005Be), Al-2 (90.8-94.7Al, 1.2-1.8Mg, 0.5Si = Fe, 3.8-4.9Cu, 0.3-0.9Mn, 0.1Ni), and Ti (94.2-96.9Ti, 1.0-2.5Al, 0.15Si, 0.3Fe, 0.3Zr, 0.7-2.0Mn, 0.15O, 0.3X) contain impurities, but bear no indication of their composition and structure, on which the performance characteristics of the materials depend. The purpose of this work was to develop an method and program for determining the alloys’ composition. The use of a complex of X-ray phase and elemental (EDX) analyses, crystal chemical calculations (the theory of closest packing—CP, metal radii—r(M)Å, and Vegard’s—V or Retger’s—R rules) allowed us to determine the compositions of these alloys.

Al-1. Substitutional solid solution (SSS) (Al1-xMgx) (sp.gr. Fm3m; аexp=4.088(7)Å) with type (ST) of Cu (98%) + impurities (2%): aCP(Al)=4.045Å, “aCP(Mg)”=4.526Å - (Al0.90Mg0.10)CP+V (~350°C) [1]; EDX (wt.%): 91Al, 8Mg, 0.2Fe, 0.3Si, 0.5Mn.

Al-2. SSS (Al1-xCux) (STCu; аexp=4.036(4)Å): aexp(Al)=4.049Å, aexp(Cu)=3.615Å; aCP(Al)=4.045Å, aCP(Cu)=3.620Å - (Al0.97Cu0.03)V =(Al0.98Cu0.02)CP+V (~500°C) [2]; EDX (wt.%): 98.3Al, 0.7Mg, 0.3Fe, 0.4Si, 0.1Mn, 0.1Cu, 0.1Ni.

Ti. SSS (Ti1-xAlx) (sp.gr. P63 /mmc; aexp=2.942, cexp=4.678Å, c/a=1.590, V=35.064Å3) with ST derived from Mg (c/a=1.633): aexp(Ti)=2.950Å, cexp(Ti)=4.684Å, V=35.300Å3; aCP(Ti)=2.940Å, cCP(Ti)=4.675Å, VCP=34.994Å3; “aCP(Al)”=2.860Å, “cCP(Al)”=4.547Å, VCP=32.208Å3 - (Ti0.92Al0.08)CP+R; “aCP(Mn)”=2.540Å, “cCP(Mn)”=4.039Å, VCP=22.566Å3 - (Ti0.98Mn0.02)CP+R; (Ti1.00-0.80Al0-0.12Mn0-0.08) (700°С) [3]; EDX (wt.%): 84.6Ti, 2.5Al, 1.0Mn, 0.2Si, 0.1Fe, 11.6О.

Thus, the composition of Al-1, Al-2, and Ti alloys are different from those indicated by the certificates.

Funding: Ministry of Science and Higher Education of the Russian Federation grant № FSFZ-2024-0003.

[1] R. Mola et al. Archivae of Foundryengineering. 2008. V.8. P.127

[2] W. Bedjaoui et al. Int. J. Automot. Mech. Eng. 2022. V.19. P.9734

[3] X.M. Huang et al. J. of Alloys and Compounds 2021. V.861. P. 158578

Keywords
Al alloy
Ti alloy
composition
structure
Poster
POSTER Kuzmicheva, Dolgov, Pavlov MDPI.pdf
POSTER Kuzmicheva, Dolgov, Pavlov MDPI.pdf
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