Structure and magnetic properties of a nickel-based superalloy after deformation

Abstract

16Davydov D.I. et al. / Structure and magnetic properties of a nickel-based superalloy after deformation.http://dream-journal.org page 16÷28 The structure and magnetic properties of ChS-70 nickel-based superalloy samples have been compared after different types of deformation. The different behavior of the magnetic properties is governed by the difference in the structure resulting from deformation. High-temperature tensile tests and shear deformation under high pressure have been performed for ChS-70 alloy samples. Samples cut from different parts of a turbine blade after operation under forced conditions have been examined. The deformation of the Chs-70 alloy under operation increases magnetic susceptibility, which is due to the formation of complex defects of the crystalline structure inside the intermetallic particles (Ni 3 Al). Dynamical recovery during the high-temperature tensile tests leads to relaxation, elimination of crystal lattice defects, and the magnetic properties remain unchanged. Shear under high pressure causes a nanocrystalline structure in the alloy, a significant decrease in the degree of the long-range order in the intermetallic phase and the preservation of the paramagnetic state. Testing, 2007, vol. 43, iss. 7, pp. 427-435. DOI: 10.1134/S1061830907070029. 3. STRUCTURE AND MAGNETIC PROPERTIES OF A NICKEL-BASED SUPERALLOY AFTER DEFORMATION KeywordsRhee Joo Yull, Kudryavtsev Y.V., Lee Y.P. Optical, magneto-optical, and magnetic properties of stoichiometric and off-stoichiometric '-phase Ni 3 Al alloys. Physical Review B, 2003, vol. 68, iss. 4, pp. 045104-1-045104-8. DOI: 10.1103/PhysRevB.68.045104. 4.Idzikowski Bogdan, Kudryavtsev Yuri V., Hyun Young-Hoon, Lee Young-Pak, Klenke Jens. Magnetic effects of structural disorder in the itinerant ferromagnet Ni 3 Al studied by magnetic and neutron methods on stoichiometric and off-stoichiometric samples. Journal of Alloys and Compounds, 2006, vol. 423, iss. 1-2, pp. 267-273. DOI: 10.1016/j.jallcom.2006 Zeng Q., Baker I. The effect of local versus bulk disorder on the magnetic behavior of stoichiometric Ni 3 Al. Intermetallics, 2007, vol. 15, iss. 3, pp. 419-427. DOI: 10.1016/j.intermet.2006. Umakoshi Y., Hiroyuki Y., Toshifumi Y. Quantitative analysis of  (gamma) precipitate in cyclically deformed Ni 3 (Al, Ti) single crystals using magnetic technique. Proc. MRS Fall Meeting, November 28-December 3, 2004, Boston, USA, 2004 Stepanova N.N., Davydov D.I., Nichipuruk A.P., Rigmant M.B., Kazantseva N.V., Vinogradova N.I., Pirogov A.N., Romanov E.P. The structure and magnetic properties of a heatresistant nickel-base alloy after a high-temperature deformation.