Begell House Inc.
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
HTM
1093-3611
21
1
2017
DEPTH PROFILING OF ELEMENTAL COMPOSITION OF SPRAYED LAYERS USING LASER-INDUCED BREAKDOWN SPECTROSCOPY
1-12
10.1615/HighTempMatProc.2017019888
E.
Ershov-Pavlov
B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Belarus
V. V.
Kiris
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezalezhnasti Ave., Minsk, 220072, Belarus
S.
Selifanov
Physical Technical Institute, National Academy of Sciences of Belarus, Minsk, Belarus
I. P.
Smyaglikov
Physical Technical Institute, National Academy of Sciences of Belarus, Minsk, Belarus
Nikolai V.
Tarasenko
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus,
68 Nezalezhnasti Ave., Minsk, 220072, Belarus
coating
metal substrate
elemental composition
depth profiling
laser-induced breakdown spectroscopy
The modern industry needs materials having high consumer properties. The performance of materials can be highly increased by using various coatings that allow obtaining high quality surfaces and considerably decreasing consumption and loading of materials. Information on chemical elemental composition and its distribution in coatings and within coating−material interface layers is very important for the coating development and application. In the present work, laser-induced breakdown spectroscopy (LIBS) is applied to analyze chemical composition of the coatings prepared by physical vapor deposition (PVD) of a micrometer range thickness and the coating formed by powder spraying in a short DC arc at atmospheric pressure with the thickness of millimeter range. The LIBS measurements for solids give obvious surface composition data: the surface is irradiated by focused laser beams inducing erosion plumes, emission spectra of which are used for the analysis. Here, the LIBS technique is used to measure the elemental composition of sprayed layers on metal samples to obtain the composition evolution from the sample surface deep into the material.
NITRIDING OF COMMERCIAL PURE TITANIUM IN THE PLASMA OF FREQUENCY-PULSED NON-SELF-SUSTAINED GLOW DISCHARGE WITH A HOLLOW CATHODE AT LOW PRESSURE
13-23
10.1615/HighTempMatProc.2017020052
Yurii F.
Ivanov
National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk, 634050, Russia; Institute of High Current Electronics, Siberian Branch of the Russian Academy
of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia
A. P.
Laskovnev
Presidium of the National Academy of Sciences of Belarus, Minsk, Belarus
Vladimir V.
Denisov
Institute of High Current Electronics, Siberian Branch of the Russian
Academy of Sciences (IHCE SB RAS), Tomsk, Russia
Vladimir V.
Uglov
Belarusian State University, Minsk, 220030, Belarus; National Research Tomsk State University, Tomsk, 634050, Russia
E. A.
Petrikova
Institute of High Current Electronics, Siberian Branch of the Russian Academy
of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia
Olga V.
Krysina
Institute of High Current Electronics, Siberian Branch of the Russian Academy
of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia
Vitali I.
Shymanski
Belarusian State University, 4 Nezavisimost Ave., Minsk, 220030, Belarus; National Research Tomsk State University, 2a Lenin Ave., Tomsk, 634028, Russia
Nikolai N.
Cherenda
Belarusian State University, Physics Faculty, 4 Nezavisimost Ave., Minsk, 220030, Belarus; South Ural State University, 76 Lenin Ave., Chelyabinsk, 454080, Russia
Nikolay N.
Koval
Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia; National Research Tomsk State University, 36 Lenin Ave., Tomsk, 634050, Russia
titanium
nitriding
plasma
frequency-pulsed glow discharge
structure
properties
Nitriding of commercial pure titanium surface in a frequency-pulsed mode of non-self-sustained glow discharge with a hollow cathode at the temperatures 600−700°C for 3 h was carried out. By means of X-ray diffraction and transmission electron microscopy the change in the phase composition of titanium after nitriding has been revealed. Increase in the nitriding temperature from 600 to 700°C results in the rising of the volume fraction of nitride phase TiN, Ti2N, and TN0.3. The results showed the threefold increase in the microhardness and the twentyfold increase in the wear resistance as compared to untreated titanium.
DETERMINATION OF THE MECHANICAL THRESHOLD STRESS IN RELATION TO AUSTENITIC STAINLESS STEEL 00H21AN16G5M4Nb
25-35
10.1615/HighTempMatProc.2017019344
Leslaw
Kyzioł
Faculty of Marine Engineering, Gdynia Maritime University, 81–87 Morska Str., 81–225 Gdynia, Poland
austenitic stainless steel
dislocations
high-speed strain
mechanical threshold stress
The article presents the results of investigation of austenitic steel 00H21AN16G5M4Nb aimed at determining the dynamic characteristics after static stretching and after stretching to 40 m·s-1. The knowledge of the dynamic characteristics of materials designed for marine structures is necessary for elucidating the behavior of materials on impact loading. At large strain rates the mechanism of plastic strain changes. The influence of nitrogen on the austenitic stainless steel properties was evaluated on
the example of steel 00H21AN16G5M4Nb. Austenitic steels demonstrate low stacking fault energy
values (SFE) due to the nitrogen content. More effective blocking of dislocations by nitrogen rather than carbon is significant in the processes of shaping the functional properties of austenitic stainless steels. The line graph presenting the dependence of stress on the temperature and strain rate allows graphical representation of change in the yield strength. On the basis of experimental studies, the mechanical threshold stress for steel 00H21AN16G5M4Nb has been determined.
POST-PROCESSING OF CERAMIC OXIDE AND METALLIC COATED SURFACES USING MICROWAVE GLAZING
37-52
10.1615/HighTempMatProc.2017020399
Mohammed
Yunus
Department of Mechanical Engineering, College of Engineering and Islamic
Architecture, Umm Al-Qura University, Makkah, Al-Abdiah, 24231, Kingdom
of Saudi Arabia
Mohammad S.
Alsoufi
Department of Mechanical Engineering, College of Engineering and Islamic
Architecture, Umm Al-Qura University, Makkah, Al-Abdiah, 24231, Kingdom
of Saudi Arabia
microwave irradiation
plasma spray deposition
HVOF
cutting tools
thermal barrier coatings
structural densification porosity
wear resistance
microhardness
alumina
In the material environment configuration, where the mechanical components and cutting tools are facing higher performance requirements, but are often restricted by their surface properties, these can be enhanced by applying industrial ceramics and/or metallic coatings. Thermal plasma
spraying is one such pragmatic coating technique for ceramics and their oxides (TBC), and a highvelocity oxyfuel (HVOF) method for metallic coatings. Inherent presence of defects due to the cohesive strength, ultra-finely grained microstructure within the splates, porosity morphology, occurrence of cracks and defects calls for suitable modification of the coating microstructures in order to
improve the quality and performance. In microwave heating (MH), energy is directly transferred to the material through an interaction of electromagnetic waves with molecules leading to volumetric heating. At low temperatures, ceramics are transparent to microwaves and absorb them at high temperatures resulting in a change in their microstructure and material characteristics. In this study, MH has been used for post-processing of plasma-sprayed alumina–titania, partially stabilized zirconia TBC coatings on the steel substrate, and HVOF-sprayed tungsten cobalt oxide
metallic coatings on cemented carbide tools, and the resulting properties are evaluated. Results show a reduction in porosity, enhancement in microhardness, surface finish, and wear resistance of the glazed surfaces of coatings.
COMPLEX ELECTRON−ION PLASMA TREATMENT OF TITANIUM: METHODS, STRUCTURE, PROPERTIES
53-64
10.1615/HighTempMatProc.2017021265
Yurii F.
Ivanov
National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk, 634050, Russia; Institute of High Current Electronics, Siberian Branch of the Russian Academy
of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia
Olga V.
Krysina
Institute of High Current Electronics, Siberian Branch of the Russian Academy
of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia
E. A.
Petrikova
Institute of High Current Electronics, Siberian Branch of the Russian Academy
of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia
A. D.
Teresov
Institute of High-Current Electronics, Siberian Branch of the Russian Academy of Sciences, 2/3 Akademicheskiy Ave., Tomsk, 634055, Russia; National Research Tomsk State University, 36 Lenin Ave., Tomsk, 634050, Russia
V. V.
Shugurov
Institute of High-Current Electronics, Siberian Branch, Russian Academy of Sciences, 2/3 Akademicheskii Ave., Tomsk, 634055, Russia; National Research Tomsk State University, 36 Lenin Ave., Tomsk, 634050, Russia
O. S.
Tolkachev
Institute of High Current Electronics, Siberian Branch of the Russian Academy
of Sciences, 2/3 Akademichesky Ave., Tomsk, 634055, Russia
electron–ion plasma treatment
nitriding
coating deposition
electronbeam irradiation
titanium
wear resistance
modification
The paper analyzes the surface characteristics of commercially pure titanium exposed to complex electron–ion plasma treatment which includes nitriding, deposition of a hard nitride coating, and electron-beam irradiation in different sequences. The analysis demonstrates specific features of complex modification depending on its sequence.
AN EXPERIMENTAL INVESTIGATION OF FLAT WIRE ELECTRODES AND THEIR WELD BEAD QUALITY IN THE FCAW PROCESS
65-79
10.1615/HighTempMatProc.2017020308
sripriyan
karuthapandi
PSG College of Technology
Ramu
Murugan
Department of Mechanical Engineering, Amrita School of Engineering, Amirta Vishwa Vidyapeetham University, Coimbatore campus - 641112, India
FCAW process
modified electrode (flat wire)
weld quality
This paper proposes a flat wire electrode technique in the flux cored arc welding (FCAW) process. E70T1 electrode was selected for the study. Flat shaped electrode can improve the quality of weld, in terms of mechanical properties. It also enhances the heat input and penetration. For
this approach, experiments are carried out with varying size of flat wire electrodes. The result indicates that, the proposed technique of flat wire electrode can be used effectively to improve the weld bead quality. Mechanical properties are analyzed and compared with results produced
by regular electrode in FCA welding. It inferred that, use of flat wire electrode in FCA welding gives 12.5% greater bending strength, 11% of greater impact strength and 8.45% of less hardness over the regular electrode in FCA welding.
INFLUENCE OF THE ANODIZING TEMPERATURE ON THE MECHANICAL PROPERTIES OF HIGHLY POROUS ANODIC ALUMINA OBTAINED USING HIGH-VOLTAGE ELECTROCHEMICAL OXIDATION
81-90
10.1615/HighTempMatProc.2017021404
Daniel
Nmadu
Department of Electrical/Electronics Engineering, Faculty of Engineering and
Technology, Alex Ekwueme Federal University, Ndufu-Alike, Ikwo, Abakaliki,
Ebonyi State, P.M.B 1010, Nigeria
Alexander A.
Parshuto
SEC Plasmoteg, Physical-Technical Institute, National Academy of Science of
Belarus, Minsk, 220141, Belarus
aluminum
high-voltage electrochemical oxidation
oxide film
electrolyte
The aim of this paper is to study the influence of the electrolyte temperature on the porosity of the AMg2 (Al 5052) aluminum alloy and also to obtain a highly ordered porous anodic alumina (PAA) with adjustable pore sizes by using high-voltage electrochemical oxidation of the mixture of phosphoric, boric, and oxalic acids. The surface morphology and elemental composition of PAA are characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDS). Moreover,
the pore formation mechanism is also discussed. The results show that the nanopore arrays in all the PAA samples are in a highly regular arrangement and the pore size ranges between 50−240 nm. However, pore widening due to chemical dissolution of the oxide by the electrolyte led to films with cone-shaped pores (hexagonal shapes or a honeycomb-like structure). This phenomenon became more pronounced with increasing electrolyte temperature. EDS analysis suggests that the main elements of the PAA are oxygen, aluminum, and a small amount of phosphorus, carbon, sodium, and magnesium.