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Документ Alloying and modification of stainless steels by powerful plasma streams(Національний науковий центр "Харківський фізико-технічний інститут", 2016) Makhlaj, V. A.; Aksenov, N. N.; Byrka, O. V.; Chunadra, A. G.; Herashchenko, S. S.; Malykhin, S. V.; Mikhailov, I. F.; Sereda, K. N.; Surovitskiy, S. V.; Garkusha, I. E.Документ Alloying and modification of stainless steels by powerful plasma streams(2016) Makhlaj, V. A.; Aksenov, N. N.; Byrka, O. V.; Chunadra, A. G.; Herashchenko, S. S.; Malykhin, S. V.; Mikhailov, I. F.; Sereda, K. N.; Surovitskiy, S. V.The stainless steel surfaces coated of tungsten have been alloyed and modified with powerful QSPA Kh-50 plasma streams. The plasma streams exposures result in modification of steel-based materials and formation of re-solidified layers. The changes of substrate texture were also registered. Phase characterized by body-centered cubic lattice appeared due to recrystallization of affected material. Thus, the favorable conditions were created for penetration of tungsten into the stainless steel bulk. Growth of lattice parameter was observed as result of plasma irradiation of coated samples. It's indication of tungsten penetration into the depth of substrates.Документ Erosion features of tungsten surfaces under combined steady-state and transient plasma loads(Національний науковий центр "Харківський фізико-технічний інститут", 2016) Herashchenko, S. S.; Makhlaj, V. A.; Girka, O. I.; Aksenov, N. N.; Bizyukov, I. A.; Malykhin, S. V.; Surovitskiy, S. V.; Sereda, K. N.; Bizyukov, A. A.The paper presents the experimental research on damage of the tungsten surfaces under combined plasma exposures. Steady-state hydrogen exposures (particle flux of 2×10²² mˉ² sˉ¹, heat flux of 1.7 MW/m², fluence of 10²⁶ mˉ², average ion energy of 2 keV) were provided by FALCON ion source. The pulsed plasma loads below the tungsten melting threshold (hydrogen plasma streams with surface heat load of 0.45 MJ/m² and the pulse duration of 0.25 ms) were performed by means of QSPA Kh-50 device. The behavior of structure, sub- structure and stress-state of tungsten samples have been studied after each cycle of pulsed and steady-state plasma loads.