Comparing features in metallurgical interaction when applying different techniques of arc and plasma surfacing of steel wire on titanium

Korzhyk, Volodymyr; Khaskin, V.Yu.; Grynyuk, Andrii; Ganushchak, Oleg; Peleshenko, S.I.; Konoreva, O.V.; Demianov, Oleksii; Shcheretskiy, Volodymyr; Fialko, Nataliia

doi:10.15587/1729-4061.2021.238634

Cited by 11 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are also point-focusing systems that use a small amount of material to focus solar energy over a small area. For example, lenses or optical systems can direct solar energy to a small photocell or high-efficiency thermal receiver, providing high energy concentration and increased system efficiency [69], [70], [71]. However, it should be considered that solar concentrators often require tracking the movement of the sun, which can be complex and require additional mechanisms.…”

Section: Discussionmentioning

confidence: 99%

Ukraine’s energy supply in the defense sector: The first lessons of war

Rabocha,

Maslii,

Robochyi

et al. 2023

Sustainable Engineering and Innovation

View full text Add to dashboard Cite

The terrible consequences of the Russian-Ukrainian war, which continues on the territory of the Ukrainian land, and the consequences of natural disasters indicate the need to create alternative (reserve or emergency) sources of energy supply for enterprises, institutions, and individual households, and objects of small forms of management, especially outside the points of permanent deployment. Ensuring an uninterrupted and stable electricity supply to all these forms is an extremely important problem for Ukraine as the country faced a large number of challenges regarding energy independence due to numerous missile strikes. The purpose of the study was to analyze the energy system and the level of damage to Ukraine after the Russian missile attacks, the impact on the state of energy supply of individual facilities and consumers of military camps, examine the possibilities of using emergency and backup energy sources and alternative energy, in particular, solar and wind. The study analyses the destruction of the energy system of Ukraine as a result of missile attacks and the possibilities of using emergency and backup energy sources and alternative energy, in particular, solar and wind, and the investigation of the potential and opportunities to attract investment in the field of alternative energy. Special attention is paid to small business facilities, including military camps. In the course of the study, it was determined that Ukraine has a geographical location that provides space for the installation of various alternative energy systems and the possibility of combining them to diversify and improve the stability and reliability of the Ukrainian energy system. The practical importance of the study lies in the ability to make more informed decisions regarding the implementation of programs aimed at switching to alternative and decentralized energy sources. This will make the country’s energy infrastructure more stable and allow better meeting the energy needs of small forms of management, individual farms, military units, formations, and infrastructure facilities.

show abstract

Section: Discussionmentioning

confidence: 99%

Ukraine’s energy supply in the defense sector: The first lessons of war

Rabocha,

Maslii,

Robochyi

et al. 2023

Sustainable Engineering and Innovation

View full text Add to dashboard Cite

show abstract

“…For butt welding of the abovementioned Q235 steel-Grade 2 titanium bimetal plates, edge preparation was performed (Figure 2) so that it was possible to first weld a layer of titanium (thickness δ = 2 mm). At this stage, plasma welding (PAW) was used, where the heat input (i.e., energy consumed in welding a unit of weld length [22]) was equal to 100-200 J/mm [23]. After this, a barrier layer from CuSi3Mn1 bronze (0.5. .…”

Section: Methodsmentioning

confidence: 99%

“…a unit of weld length [22]) was equal to 100-200 J/mm [23]. After this, a barrier layer from CuSi3Mn1 bronze (0.5…1.0 mm thick) was deposited on the welded titanium layer, which separated the titanium from the steel.…”

Section: Methodsmentioning

confidence: 99%

Features of Intermetallic Formation in the Solid Phase on a Steel–Titanium Bimetal Interface under the Conditions of Arc Welding

Korzhyk

Zhang

Khaskin

et al. 2023

Metals

View full text Add to dashboard Cite

The object of this study is the formation of intermetallic phases (IMPhs) in the heat-affected zone (HAZ) of joints of steel–titanium bimetal plates produced by arc welding. A titanium layer (2 mm) was welded by the plasma method (PAW), a barrier layer of Cusi3Mn1 bronze was deposited on it by the TIG method, the first steel layer was deposited by CMT, and Puls-MAG was used for filling the groove. Here, heating in the solid phase takes place in the HAZ, which may lead to undesirable formation of brittle IMPhs and further welded joint failure. Mathematical modeling was performed and metallurgical features formed during the processes of heating of the HAZ in bimetal steel–titanium plates were studied to identify the risk of IMPh formation. It was found that at a temperature increase from 900 to 1450 °C, a continuous intermetallic layer formed on the steel–titanium interface, which contained FeTi IMPh, and the width of which increased from 1 to 10 μm. In the temperature range 1300…1430 °C, an intermetallic TiFe2-type phase additionally formed from the titanium side. In the temperature range 1430…1450 °C, the TiFe2 phase was replaced by the TiXFe phase, which formed both from the steel side and from the titanium side. This phase consists of intermetallics (73–75% Ti + 27–25% Fe) and (80–85% Ti + 20–15% Fe), and it is close to the Ti2Fe-type phase. The interlayer of intermetallics, formed at temperatures of 900…1300 °C, has a continuous morphology (HV0.01–650…690). At temperatures rising above 1300 °C, the IMPh interlayer became more ramified (HV0.01–590…610) because of the formation of a larger number of pores and microcracks within it. In the temperature range 900…1450 °C, solid-phase diffusion proceeded in the steel–titanium bimetal near the interface of the two metals. A zone of iron diffusion, 5–10 μm to 40–60 μm in width, formed in titanium. In steel, a zone of titanium diffusion 15–20 μm to 120–150 μm in width formed, starting from 1300 °C and higher. It is recommended to perform industrial welding of steel–titanium bimetal in modes, for which the heat input is equal to 200…400 J/mm. Here, during the period 10–12 s, the heating temperature of the HAZ 1.5–3.5 mm in width is equal to 900–1150 °C. It promotes formation of an intermetallic FeTi-type interlayer of up to 1–2 μm width.

show abstract

“…Fatigue fractures are especially dangerous in that they can develop under the action of stresses that are much lower than the ultimate strength and yield strength (Borisov et al, 1987;Stepnov, 1985;Suleimenov et al, 2022). It is noted that more than 80% of all cases of operational failure occurs as a result of cyclic loading (Bekbauov et al, 2017;Korzhyk et al, 2021;Lei et al, 2021). Due to the long duration, and, consequently, the high cost, fatigue tests to determine the endurance limit of samples are often carried out not until destruction, but for the determination of operating time, a certain test base NB.…”

Section: Introductionmentioning

confidence: 99%

Using the linear damage summation hypothesis in determining the endurance limit of titanium alloy

Скворцов

Gnatyuk²,

Sklemina³

et al. 2023

JART

View full text Add to dashboard Cite

The presented paper is relevant, as it presents the results of fatigue tests of titanium alloy. The purpose of the article is to describe the use of the hypothesis of linear damage summation when processing the results of fatigue tests. In the study, the authors used empirical methods such as indirect observation of the object under study, description, and measurement of technical influences exerted on it by an artificial means. The linear regression analysis to establish the relationship between stress and durability was also used. The endurance limit of the titanium alloy was determined, which lies in the range from 460 to 480 MPa with the number of cycles from 105 to 108. It was concluded that the use of the linear damage summation hypothesis in processing the results of fatigue tests entails a satisfactory practical accuracy of the calculation of endurance limit

show abstract

Comparing features in metallurgical interaction when applying different techniques of arc and plasma surfacing of steel wire on titanium

Cited by 11 publications

References 14 publications

Ukraine’s energy supply in the defense sector: The first lessons of war

Ukraine’s energy supply in the defense sector: The first lessons of war

Features of Intermetallic Formation in the Solid Phase on a Steel–Titanium Bimetal Interface under the Conditions of Arc Welding

Using the linear damage summation hypothesis in determining the endurance limit of titanium alloy

Contact Info

Product

Resources

About