Controlling the Depth of Penetration in the Case of Surfacing with a Strip Electrode at an Angle to the Generatrix

Lavrova, Elena; Ivanov, V. P.

doi:10.4028/www.scientific.net/msf.938.27

Cited by 6 publications

(7 citation statements)

References 8 publications

(9 reference statements)

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“…The quality of a welding joint is also affected by the dynamic properties of a power source [12,13]. Given this, sources for pulse-arc welding are being developed [14].…”

Section: запропоновано схемне рішення і алгоритм управління зварювальmentioning

confidence: 99%

Impoving energy characteristics of the welding power sources for TIG-AC welding

Burlaka

Lavrova

2019

EEJET

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38 2. Literature review and problem statement The TIG-AC process (Tungsten Inert Gas-Alternating Current) is often used to weld aluminum alloys, in which the AC electric arc burns between a non-fusible tungsten electrode and an aluminum article. The voltage on a welding arc over one half-period may differ from the voltage over another half-period due to the different emission properties of the electrode and the article's metal. Because of this, a DC current component emerges in the welding circuit, which can be up to 70-80 % of the working welding current [2]. This component of the welding current causes the magnetization of the core of the welding transformer, which leads to the growth of the magnetization current and to overheating the transformer. The DC component of the secondary current of the welding transformer can be eliminated by including a capacitor battery into the welding circuit [3]. The advantage of this technique is the ease of implementation. The drawbacks of the technique: complexity of weldin 23 g current regulation, poor mass-size indicators, impossibility to ensure a quality welding process without the use of expensive equipment, low reliability of equipment (battery of electrolytic capacitors).

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“…The quality of a welding joint is also affected by the dynamic properties of a power source [12,13]. Given this, sources for pulse-arc welding are being developed [14].…”

Section: запропоновано схемне рішення і алгоритм управління зварювальmentioning

confidence: 99%

Impoving energy characteristics of the welding power sources for TIG-AC welding

Burlaka

Lavrova

2019

EEJET

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“…The distribution of a temperature field was calculated in relation to steel St3, so the following values for the thermal physical constants were accepted: thermal conductivity l=40 W/m•K; values сρ=4.9•10 6 J/m 3…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The benefits of using it at surfacing under the flux were shown for both one [1] and two strip electrodes [2]. In this case, it is possible to ensure a more even distribution of thermal energy along the width of the weld pool, as well as when changing the angle of the strip's turn relative to the surfacing vector [3], as well as adjust the heat flow by the depth of the penetration zone. In this regard, it is a relevant task for modern production of metallurgical and machine-building equipment to undertake a study into the impact of parameters of the transfer of an…”

mentioning

confidence: 99%

Calculation of the penetration zone geometric parameters at surfacing with a strip electrode

Ivanov

Lavrova

Burlaka

et al. 2019

EEJET

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“…Contrary to the described mechanism, the main crack retardation in composites lacking a clearly defined separation (connection) line between layers results from crack deviation, or branching. This occurs under the influence of a discontinuity in the residual stress diagram, which is formed when the structure of the deposited metal changes with a variation in the direction of crystallization caused by changing the cladding direction (substituting the cladding direction along the helical line with the direction along the generatrix) [18].…”

Section: Introductionmentioning

confidence: 99%

Resistance of Heterogeneous Metal Compositions to Fracture under Dynamic and Cyclic Loads

Leshchinskiy,

Ivanov,

Lavrova

et al. 2023

Metals

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This paper presents the results of experimental data analysis, which indicate an increased resistance of heterogeneous multilayer clad composites to dynamic loading destruction compared with homogeneous materials. The reason for this is the crack retardation caused by lamination at the boundary of the layers. The destruction of heterogeneous compact composite samples by cyclic off-center stretching also occurs with crack retardation, with the fractogram clearly demonstrating the transverse tightening of the sample section. We argue that crack nucleation plays a decisive role in the process of dynamic destruction of heterogeneous composites obtained by both multilayer cladding and explosion welding. This study presents generalized calculated data confirming the influence of the sign and magnitude of residual stresses (the appearance of a stress discontinuity) on the conditions of fatigue surface crack nucleation and propagation. Unlike homogeneous materials obtained by casting, forging (rolling), or cladding, which are characterized by a linear dependence of the crack propagation velocity on the dynamic stress intensity coefficient, for multilayer composites consisting of strong and viscous layers, a sharp crack deceleration is observed. This is due to the transition of the crack boundary between the strong and viscous layers. This paper presents studies of the corresponding properties of adjacent layers on the integral characteristics of the deposited composite.

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Controlling the Depth of Penetration in the Case of Surfacing with a Strip Electrode at an Angle to the Generatrix

Cited by 6 publications

References 8 publications

Impoving energy characteristics of the welding power sources for TIG-AC welding

Impoving energy characteristics of the welding power sources for TIG-AC welding

Calculation of the penetration zone geometric parameters at surfacing with a strip electrode

Resistance of Heterogeneous Metal Compositions to Fracture under Dynamic and Cyclic Loads

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