Effect of Mechanical Activation and Gamma-Irradiation on Structural-Phase State of Ti-Al-C Powder Reagents

2021 ◽  
Vol 410 ◽  
pp. 674-679
Author(s):  
Aleksei V. Sobachkin ◽  
Alexander A. Sitnikov ◽  
Andrey Yu. Myasnikov
Keyword(s):  
Gamma Irradiation ◽  
Mechanical Activation ◽  
Phase State ◽  
Structural Parameters ◽  
Structural Phase ◽  
Crystal Lattices ◽  
Structural Phase State ◽  
Diffuse Background ◽  
Ratio Of Components ◽  
Accumulated Dose

The influence of mechanical activation and gamma-irradiation on the structural-phase state of Ti-Al-C powder reagents was studied. The following compositions were used for research: 1) 78% Ti + 14% Al + 8% C; 2) 80% Ti + 12% Al + 8% C; 3) 81% Ti + 10% Al + 9% C. Mechanical activation of these compositions leads to an increase in the diffuse background, a decrease in the intensity of diffraction reflections of mixture components and a broadening of peaks, as well as micro-deformations. Depending on the ratio of components, the structural parameters can either increase in comparison with the initial ones, or decrease. The effect of gamma radiation with a dose rate of 1 Gy/s and accumulated dose of 3·104 Gy on the mechanocomposites of the Ti-Al-C system causes unsystematic change in crystal lattices of elements, which can be explained by radiation-stimulated diffusion. Gamma-irradiation also reduces micro-deformations that occur after mechanical activation, while crystallites of the components remain nanoscale.

Influence of composition on the structural-phase state, electrophysical and magnetotransport properties of alloy thin films based on Co and Cu

Vacuum ◽  
2021 ◽  
Vol 187 ◽  
pp. 110141
Author(s):  
I.O. Shpetnyi ◽  
I.Yu Protsenko ◽  
S.I. Vorobiov ◽  
V.I. Grebinaha ◽  
L. Satrapinskyy ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase State ◽  
Structural Phase ◽  
Structural Phase State

Influence of ball milling duration on the morphology, features of the structural-phase state and microhardness of 3Ni-Al powder mixture

2021 ◽  
Author(s):  
Ivan A. Ditenberg ◽  
Denis A. Osipov ◽  
Michail A. Korchagin ◽  
Ivan V. Smirnov ◽  
Konstantin V. Grinyaev ◽  
...  
Keyword(s):  
Ball Milling ◽  
Powder Mixture ◽  
Phase State ◽  
Structural Phase ◽  
Structural Phase State ◽  
Milling Duration ◽  
Al Powder

Effect of Alloying Elements on the Structural Phase State of Hadfield Steel

2021 ◽  
Vol 33 (11) ◽  
pp. 04021324
Author(s):  
Almira Zhilkashinova ◽  
Mazhyn Skakov ◽  
Madi Abilev ◽  
Dossym Yerbolatuly
Keyword(s):  
Phase State ◽  
Structural Phase ◽  
Alloying Elements ◽  
Hadfield Steel ◽  
Structural Phase State ◽  
Effect Of Alloying

scholarly journals Influence of electrolytic plasma nitriding mode on structural phase state of pearlitic steel

2018 ◽  
Vol 143 ◽  
pp. 03004
Author(s):  
Natalya Popova ◽  
Lyudmila Erygina ◽  
Elena Nikonenko ◽  
Mazhin Skakov
Keyword(s):  
Phase State ◽  
Plasma Nitriding ◽  
Water Solution ◽  
Lath Martensite ◽  
Structural Phase ◽  
Pearlitic Steel ◽  
Parallel Plates ◽  
Structural Phase State ◽  
Original State ◽  
Α Phase

The paper describes results of studies of phase transitions in structural phase state occurring in the type 0.34C-1Cr-1Ni-1Mo-Fe steel under electrolytic plasma nitriding in nitrogen-containing water solution. The nitriding voltages considered in the given study were 550 and 600 V. The research was conducted by means of X-ray diffraction electron microscopy. The specimens were studied in two states : 1) before modification (original state) and 2) after nitriding in the surface layer of the specimen. The study was conducted on thin foils. It was found that nitriding lead to significant changes in the structure of steel, namely in its phase composition and in the number of existing phases. In the original state the structure of steel was given as lamellar pearlite, ferritic carbide mix and fragmented ferrite. After 550 V nitriding it was lath martensite, plates of α-phase, with colonies of thin parallel plates of γ-phase and coarse grains of α-phase, containing γ-phase grains which were different in size and shape and were various-directional. Increase in nitriding voltage up to 600 V lead to change in the structure given as a lamellar non-fragmented pearlite and fragmented ferrite. The original state was marked by presence of particles of M3C cementite, after nitriding irrespective of the voltage it had the particles of M3C alloyed cementite, Fe3Mo3N nitride and Cr2C0.61N0.39 carbonitride. The sizes, volume fractions and locations of particles were dependent on nitriding voltage.

The structural-phase state and magnetoresistive properties of thin film alloys obtained by co-evaporated Cu and Co

2019 ◽  
Vol 474 ◽  
pp. 624-631 ◽  
Author(s):  
I.O. Shpetnyi ◽  
D.M. Kondrakhova ◽  
S.I. Vorobiov ◽  
B. Scheibe ◽  
V.I. Grebinaha ◽  
...  
Keyword(s):  
Thin Film ◽  
Phase State ◽  
Structural Phase ◽  
Structural Phase State
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