Obrabotka Metallov 2015 No. 4

ОБРАБОТКА МЕТАЛЛОВ № 4 (69) 2015 100 МАТЕРИАЛОВЕДЕНИЕ Abstract The experimental research of the structural state of the powder components under the influence of γ-irradiation on the powder mixture Ti + Al, and the mixture of the same composition after preliminary mechanical activation treatment is carried out. Samples of selected powder mixtures were irradiated by γ-rays in small dose. To investigate the parameters of fine structure the method X-ray diffraction is used. The dependence between preliminary mechanical activation treatment of the powder mixture and its structural parameters also as the fine structure (size of coherent scattering regions, microstrain) after influence γ-irradiation is established. The influence γ-irradiation on the structural condition of mechanically activated mixture is different. From calculation of the fine structure of the two components in mechanically activated mixture follows that the applicable dose of γ-irradiation parameters affect the fine structure of components in different ways. For example, for Ti after γ-irradiation the value of crystal lattice significantly reduced ROC, and slightly increases the microstrains in the crystal lattice. It was found that preliminary mechanical activation treatment of the powder mixture Ti +Al is a stimulator for the radiation-induced state of the components even at low doses of γ-irradiation. In the sample of preliminary mechanical activation powder mixture, which was irradiated by γ-rays, are formed radiation-induced states of components, which is not observed in the sample of non-mechanical activation powder mixture. Increasing the value of microhardness of irradiated sample in comparison non-mechanical activation powder mixture, wherein the mechanical properties are correlated with the structural changes. Keywords : powder mixture, aluminum, titanium, mechanical activation, γ-irradiation, X-ray diffraction, structural parameters, crystalline lattice, grain, microstrains. DOI: 10.17212/1994-6309-2015-4-93-101 References 1. Lomovskii O.I., ed. Mekhanokompozity – prekursory dlya sozdaniya materialov s novymi svoistvami [Mecha- nocomposites – precursors for the creation of materials with new properties]. Novosibirsk, SB RAS Publ., 2010. 424 p. ISBN 978-5-7692-1108-9 2. Grigor’eva T.F., Barinova A.P., Lyakhov N.Z. Mekhanokhimicheskii sintez v metallicheskikh sistemakh [Mech- anochemical synthesis in metallic systems]. Novosibirsk, Parallel’ Publ., 2008. 312 p. 3. Filimonov V.Yu., Sitnikov A.A., Afanas’ev A.V., Loginova M.V., Yakovlev V.I., Negodyaev A.Z., Schreifer D.V., Solov’ev V.A. Microwave-assisted combustion synthesis in mechanically activated 3Ti + Al powder mixtures: structure formation issues. International Journal of Self-Propagating High-Temperature Synthesis , 2014, vol. 23, iss. 1, pp. 18–25. doi: 10.3103/S1061386214010038 4. Mukasyan A.S., Khina B.B., Reeves R.V., Son S.F. Mechanical activation and gasless explosion: nanostruc- tural aspects. Chemical Engineering Journal , 2011, vol. 174, iss. 2–3, pp. 677–686. doi: 10.1016/j.cej.2011.09.028 5. Filimonov V.Yu., Sytnikov A.A., Yakovlev V.I., Loginovа M.V., Afanasyev A.V., Negodyaev A.Z. The features of structure formation in mechanically activated powder mixture 3Ti + Al in the thermal explosion mode. Applied Mechanics and Materials , 2014, vol. 621, pp. 71–76. doi: 10.4028 /www.scientific.net/AMM.621.71 6. Voevodin V.N., Ozhigov L.S., Laptev I.N., Bryk V.V., Neklyudov I.M., Parkhomenko A.A. Kooperativnye mody radiatsionnogo okhrupchivaniya [Cooperation modes of the radiation embrittlement]. Voprosy atomnoi nauki i tekhniki. Seriya: Fizika radiatsionnykh povrezhdenii i radiatsionnoe materialovedenie – Problems of atomic science and technology. Series: Physics of Radiation Effect and Radiation Materials Science , 2012, no. 5 (81), pp. 51–6 1 . 7. Parkhomov V.A., Dmitriev A.V., Bazarzhapov A.D. Spatial features of current systems of SFE-flares ac- companied by gamma radiation. Geomagnetism and Aeronomy , 2010, vol. 50, iss. 8, pp. 1003–1014. doi: 10.1134/ S0016793210080116 8. Stoller R.E., Walker F.J., Specht E.D., Nicholson D.M., Barabash R.I., Zschack P., Ice G.E. Diffuse X-ray scat- tering measurements of point defects and clusters in iron. Journal of Nuclear Materials , 2007, vol. 367–370, pt. A, pp. 269–275. doi:10.1016/j.jnucmat.2007.03.019 9. Li D., Imasaki K., Miyamoto S., Horikawa K., Amano S., Mochizuki T. Positron generation through la- ser Compton scattering gamma ray. Applied Physics Letters , 2009, vol. 94, iss. 9, pp. 091112-1–091112-3. doi: 10.1063/1.3094882