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The change in the structural-phase state and microhardness of the 67CoNi5Nb alloy while ion and electron beams processing

Authors: Скаков Мажын Канапинович, Рахадилов Бауыржан Корабаевич, Зарва Денис Борисович, Гулькин Александр Владимирович

Keywords: ионная имплантация, электронно-лучевая обработка, микротвердость, сплав

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The article shows the influence of ion implantation of nitrogen and electron-beam processing on structural-phase state and microhardness of a dispersion-hardening 67CoNi5Nb alloy. It is established that at the surface treatment of electronic and ion beams is the place to morphological changes, and changes in the elemental composition of the 67CoNi5Nb alloy. It is determined that in the result of treatment by nitrogen ions and electrons on the surface of a dispersion-hardening 67CoNi5Nb alloy formed fine inclusion due to surface segregation of niobium. It is shown that the
ion implantation leads to an increase in the microhardness to 10–50%, depending from dose of irradiation. It is determined that the surface microhardness of the 67CoNi5Nb alloy after electron irradiation increases almost to 2 times.

Thermal resistant coating obtained from zirconium and aluminum oxides by detonation method

Authors: Плотников С.В., Кантай Н., Рахадилов Бауыржан Корабаевич, Абилев М., Пашковский М.

Keywords: микротвердость, 12Х18Н10Т, детонационный метод

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The aim of this work was to study coatings deposited by the detonation method on the surface of stainless steel 12X18H10T. CCDS detonation complex, Xpert Pro X-ray analysis (U = 40 kV, I = 30 mA CuKα), Phenom ProX scanning electron microscope (SEM) and DuraScan-20 microstructure detection methods were used. The surface of the steel was covered by Al2O3 and ZrO2 powders in 500 and 1100 μm thick. The thickness of the coating was measured and the elemental analysis was performed. Based on literary reviews and research, it was found that the covering of the metal with different coatings increases the physico-mechanical and tribological properties.

Modification of TiN coatings by electron irradiation

Authors: Журерова Л., Рахадилов Бауыржан Корабаевич, Кенесбеков А.Б., Кожанова Р.

Keywords: облучение, микротвердость, TiN

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This work presents the experimental results of structural and phase changes research study in TiN coatings under thermal and electron irradiation. Continuous electron irradiation of coated samples was performed on the ELV-4 accelerator. It was determined that electron irradiation with an electron energy of 1.3 MeV and an integral irradiation dose of 0.52·1019 e − /cm2 leads to an increase in the microhardness of TiN coatings by 20%. It has been established that the main factor in increasing the microhardness of the coating after electron irradiation in the above regimes is the formation of new phases, in particular the intermetallide of Co2Ti.

Effect of the fluence of high-energy crypton ions irradiation on Ni-Ti alloy hardening

Authors: Сатпаев Д.А., Полтавцева В.П., Партыка Я.

Keywords: микротвердость, сплав, Ni-Ti

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The patterns of changes in microhardness and phase composition of Ni-Ti alloy in the austenitic structural-phase state have been experimentally studied depending on the fluence of irradiation with 84Kr15+ ions with the energy of 147 MeV. It was established that hardening with a maximum in the range of the projected range Rp and in the out-of-range region (h > Rp) increases with the growth of the irradiation fluence up to 5·1019 ion/m2 . It was shown that the reason of hardening is formation of the radiation-introduced hardened defective structures. The formation of nano-sized particles of the martensitic R-phase and the decrease in Ni-Ti phase content with the B2 structure are also characteristic in the process of irradiation up to maximum fluence due to radiation effects.