Effect of complex modification on properties and structure of nickel super alloy

Serhii Danylov, Dmytro Tоmkin, Valeriy Naumyk, Daria Tkach, Volodymyr Klochikhin, Oleksii Pedash

Abstract


In this work, a study of the influence of complex modification of the ZhS3DK-VІ nickel-based heat-resistant super alloy was conducted. The modification was performed out according to different technological schemes: with highly dispersed titanium carbonitrides Ti[Ti(C,N)] particles, with Ti [Ti(C,N)]+CoAl2O4 and Ti[Ti(C,N)]+CoAl2O4+Ni-Y complex that made it possible to investigate the specifics of the influence of the volume modifier Ti[Ti(C,N)] separately, and its complex effect with surface modifierCoAl2O4 and rare earth metals (with Ni-Y master alloy use) in the macro- and microstructure of a heat-resistant nickel alloy. It was shown that the use of modifiers allows for significant refining of macrograins, and the greatest effect was obtained with Ti[Ti(C,N)]+CoAl2O4 and Ti[Ti(C,N)]+Ni-Y+CoAl2O4complexes. Microstructure study allows to show that the value of interdendritic distances in both the case of modification with Ti[Ti(C,N)] and Ti[Ti(C,N)]+Ni-Y+CoAl2O4 complexes essignificantly decreased, from 100…130 μm to 80...120 μm, which is the result of many nuclei formation during crystallization in the volume of the alloy and with highly intense heat transfer from the melt by CoAl2Omodified ceramic mould after melt pouring. Based on the results of the influence of various types of modification on the microstructure of the alloy under study, it was established that modification according to all schemes allows obtaining carbides of smaller sizes, but grown sizes of carbonitrides was observed. Globular particles of carbide and carbonitrides are evenly located along the cross-section of the samples under study. In all cases of modification, a decrease in the value of the shrinkage microporosity was observed. The mechanical properties of the specimens after standard heat treatment shows, that modification with complexes under study allows provide mechanical properties that meet the specification requirements. The best complex of alloy mechanical properties at room temperature, fracture toughness and stress-rupture strength provides with Ti[Ti(C,N)]+Ni-Y+CoAl2O4 modifiers complex.

Keywords


heat-resistant nickel alloy; modifier; macrostructure; dendrites; carbonitrides; carbide; cobalt aluminate

References


Kablov, E. N. Lityye lopatki gazoturbinnykh dvigateley: splavy, tekhnologii, pokrytiya [Cast blades for gas turbine engines: alloys, technologies, coatings]. Moscow, Nauka Publ., 2006. 632 p.

Grekova, M. V., Kalinin, A. V., Dzhur, E. A., Nosova, T. V. Kompleksnoye modifitsirovaniye nogokomponentnykh splavov [Complex modification of multicomponent alloy]. Kosmíchna nauka í tekhnologíya – Space science and technology, 2019, vol. 25, no. 3, pp. 25-31. DOI: 10.15407/knit2019.03.025.

Lysenko, N. A., Klochikhin, V. V., Tomkin, D. A. Vliyaniye modifitsirovaniya karbonitridom titana na strukturu i svoystva zharoprochnogo splava ZHSZDK-VI s ponizhennym soderzhaniyem ugleroda [Influence of titanium carbonitride modification on the structure and properties of ZhSZDK-VI heat-resistant alloy with reduced carbon content]. Vestnik NTU «HPI»: sb. nauch. tr. Temat. vyp. : Jenergeticheskie i teplotehnicheskie processy i oborudovanie [Herald of NTU «HPI» Series: Energy and heat engineering processes and installations ], 2010, no. 3. pp. 113-120.

Boguslaev, O.V., Balushok, K. B., Klochikhin, V.V., Milonin, Ye.V., Naumyk, V.V., Shalomeiev, V. A. Resursozberigayuchi technologii vyrobnytztva lytva dlya aviatziynogo dvigunobuduvannya [Resourse-saving casting technologies for aero engines building]. Zaporizhzhya, Motor Sich JSC, 2021. 197 p.

Klochikhin, V. V., Danylov, S. N., Lysenko, N. A., Naumyk, V. V. Razrabotka technologii modifizirovaniia zharoprochnogo nikelevogo ultradispersnymi poroshkami karbonitrida titana [Development of modification technique ZhS3DK-VI superalloy with ultra-fine titanium carbonitrides powders]. Novi materialy i technologii v metalurgiyi ta mashinobuduvanni – New materials and technologies in metallurgy and machinebuilding, 2020, no. 2, pp. 37 – 44

Lysenko, T. B., Yasyukov, V. V., Voronova, O. I., Kozishkurt, Ye. N., Kreytser, K. A. Ispol'zovaniye nanotekhnologiy pri izgotovleni iotlivok [The use ofnanotechnology in the manufacture of castings]. Lit'ye i metallurgiya, 2019, no. 4, pp. 94-99. DOI: 10.21122/1683-6065-2019-4-94-99.

Bohuslaev, A. V., Klochykhyn, V. V., Lysenko, N. A., Naumyk, V. V. Yspolʹzovanye nanotekhnolohyy v lyteynom proyzvodstve [The use of nanotechnologies in foundry production]. Visnyk Donbasʹkoyi derzhavnoyi mashynobudivnoyi akademiyi – Herald of Donbas state machinebuilding academy, 2011, no. 4 (25), pp. 23-28

Kalynyna, N. E., Dzhur, E. A., Mamchur, S. Y., Shakhov, A. A. Vlyyanye lehyrovanyya i modyfytsyrovanyya na svoystva zharoprochnykh splavov[The influence of alloying and modification on the properties of heat-resistant alloys]. Systemne proektuvannya ta analiz kharakterystyk aerokosmichnoyi tekhniky – System design and characteristics analysis of aerospace technique, 2017, vol. XXIІІ, pp. 28-32

Boguslaev, A. V., Klochikhin, V. V., Lysenko, N. A., Dubrov, G. L., Temkin, D. A. Modifitsirovaniye zharoprochnykh splavov ul'tradispersnymi poroshkami [Modification of heat-resistant alloys with ultrafine powders]. Vestnik dvigatelestroeniya - Herald of aeroenginebuilding, 2008, no. 1, pp. 47-51

Kalinina, N. Ye., Kalinovskaya, A. Ye., Kalinin, V. T. Dudnikov, A. S. Osobennosti nanomodifitsirovaniya mnogokomponentnykh nikelevykh splavov [Features of nanomodification of multicomponent nickel alloys]. Aviacijno-kosmicna tehnika i tehnologia – Aerospace technic and technology, 2012, no. 7 (94), pp.23–26.

Kalinina, N. Ye., Yukhimenko, A. Ye., Kalinin, V. T. Kompleksnoye modifitsirovaniye slozhnolegirovannykh zharoprochnykh splavov [Complex modification of complexly alloyed heat-resistant alloys]. Vísnik dvigunobuduvannya - Herald of aeroenginebuilding, 2014, no. 2, pp. 181-185

Kalinina, N. E., Glushkova, D. B., Voronkov, A. I., Kalinin, V. T. Influence of nanomodification on structure formation of multicomponent nickel alloys. Funct. Mater., 2019, vol. 26, iss. 3, pp. 514-518. DOI: 10.15407/fm26.03.514.

Pedash, A. A., Tsivirko, E. I. Vliyaniye modifitsirovaniya odnorodnogo rasplava na strukturu I svoystva splava ZHS3LS-VI [Influence of modification of a homogeneous melt on the structure and properties of ZhS3LS-VI alloy]. Vestnik dvigatelestroyeniya - Herald of aeroenginebuilding, 2008, no. 2, pp. 171-177.

Pedash, A. A., Byalik, G. A., Tsivirko, E. I. Povysheniye teploprovodnosti liteynoy keramicheskoy formy alyuminatom kobal'ta [Increasing the thermal conductivity of a foundry ceramic mold with cobalt aluminate]. Aviacijno-kosmicna tehnika i tehnologia – Aerospace technic and technology, 2015, no. 10 (127), pp. 40–44.

Zhemanyuk, P. D., Pedash, A. A., Tsivirko, E. I., Pedash, A. F. Kombinirovannoye modifitsirovaniye pri poluchenii detaley turbin GTD [Combined modification during the production of GTE turbine parts]. Vestnik dvigatelestroyeniya – Herald of aeroenginebuilding, 2013, no. 1, pp. 75-58.




DOI: https://doi.org/10.32620/aktt.2022.4sup2.15