Effect of the Electrodynamic Treatment on the Life of AMg6 Aluminum Alloy Weld Joints

Lobanov, L.M.; Pashchin, N. А.; Timoshenko, Alena; Goncharov, P.V.; Mikhodui, O.L.; Sidorenko, Yu. M.

doi:10.1007/s11223-017-9862-8

Cited by 17 publications

(3 citation statements)

References 2 publications

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“…The analysis of results of evaluation of change in values of the temperature of surface of plates T surf under the inductors L (Figure 1, a) at TPEMF, as well as in the zone of contact interaction of the electrode 2 ( Figure 1, b) in the EDT zone, showed influence of Joule heating on the stressed state of specimens at the methods of treatment described above is almost absent. Thus, the peak values of T surf at TPEMF did not exceed 25 °C [8], while at EDT -30 °C [11], which has no significant influence on the stressed state of AMg6 alloy [10].…”

Section: Scientific and Technicalmentioning

confidence: 99%

“…The interaction of magnetic field of the inductor and the eddy currents induced by it in the disc 3 results in generation of electrodynamic force, which transfers pressure P EDT through the electrode 2 to the contact area simultaneously with passing of pulsed current through it. The commutation of electric circuit consisting of capacity, inductance of the inductor and active resistance of the conductors, was realized by the control key K. The EDT was performed at the values of U ch = 500 V and C ch = 6600 mF and were, respectively, 3.1 kA and 1.0 ms [10]. The effect of EDT, as well as in the case of TPEMF, is determined by summing the two effects, the first of which is the pulsed pressure P EDT preset by passing PEC through the inductor L, disc 3 and electrode 2, the value of which reaches 20 kN at U ch = 500 V. The second is the electric current of a specified density which spreads from the contact area.…”

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Comparison of influence of pulsed effects of magnetic and electric fields on stressed state of welded joints of aluminium alloy AMG6

Lobanov¹,

Kondratenko²,

Pashchin³

et al. 2016

The Paton Welding J.

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The residual welding stresses negatively affect the fatigue limit of welded joint, being the main cause for brittle fracture of metal, i.e. corrosion cracking. Therefore, the development of effective methods for control of welding stresses, characterized by low energy consumption and relatively simple realization, is traditionally an urgent problem for modern production. At the present time the methods for reducing welding stresses became widespread, based on the influence of pulses of electric current and magnetic field. Moreover, each of the methods has its advantages and disadvantages, and evaluation of their efficiency in the control of residual welding stresses represents an urgent problem. In the work the comparative evaluation of efficiency of control of residual stresses of AMg6 alloy of welded plates was carried out at treatments by pulsed electromagnetic field (TPEMF) and pulsed current (EDT), applying planar inductors. Using the method of electron speckle interferometry it was revealed that TPEMF and EDT reduce the initial level of welding stresses in the zone of pulsed effects to 100 %. 16 Ref., 1 Table, 4 Figures. K e y w o r d s : electrodynamic and magnetic pulse treatment, aluminium alloy, welded joint, electron speckle interferometry, efficiency of treatment, residual stresses, electroplastic effect, current density, planar inductorThe investigations of influence of residual welding stresses on strength of welded joints, especially at cyclic loading are traditionally relevant in engineering practice of service of metallic structures. It is connected with the fact that welding stresses negatively affect the fatigue limit of welded joint, increasing the rates of fatigue crack propagation [1,2]. In this case the tensile welding stresses at their interaction with corrosive-active environment are the main cause for brittle fracture of metal, i.e. corrosion cracking [3].Traditionally, technological operations on reduction of welding stresses are sufficiently labor-intensive and are restricted by thermal or mechanical effect on the metal of welded joint. The development of efficient methods for control of welded stresses, characterized by low power consumption and relatively simple realization, is urgent for modern production.In scientific and technical publications the results of investigations of influence of pulses of electric current (PEC) and magnetic field (PEMF) on relaxation of technological stresses [4][5][6], including residual welding stresses, are presented [7,8]. Each of the effects mentioned above, has its advantages and disadvantages and the evaluation of efficiency of control of residual stresses is a relevant problem.The aim of the present work was the comparative evaluation of parameters of treatment using pulsed electromagnetic field (TPEMF) and pulsed current (EDT) on reduction of residual stresses in welded joints of aluminium alloy. methods of investigations. To carry out investigations the specimens of welded joint and base metal of annealed aluminium alloy AMg6 were used. The mo...

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Section: Scientific and Technicalmentioning

confidence: 99%

mentioning

confidence: 99%

Comparison of influence of pulsed effects of magnetic and electric fields on stressed state of welded joints of aluminium alloy AMG6

Lobanov¹,

Kondratenko²,

Pashchin³

et al. 2016

The Paton Welding J.

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“…В той же час, експериментальний метод оцінки ефективності ЕДО, який описано в роботі [6], достатньо складно використовувати для пошуку оптимальних режимів обробки широкої гами металів, сплавів і зварних з'єднань. Це пов'язано із розглядом і оцінкою великої кількості технологічних варіантів ЕДО на відповідність встановленому критерію оптимізації -зниженню залишкових зварювальних напружень до заданого рівня.…”

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Welding dissimilar high-strength nickel alloys in poly- and single-crystal combinations

Yushchenko¹,

Zaderii²,

Gakh³

et al. 2021

Avtom. svarka (Kiev)

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Представлено розрахункову модель процесу ударної взаємодії електрода-індентора з пластиною із алюмінієвого сплаву АМг6 при електродинамічній обробці. Рішення задачі проводено на базі співвідношень Прантля-Рейсса для руху пружно-пластичного середовища в плоскій двумірній лагранжевій постановці з використанням програми «ANSYS/LS-DYNA». Представлені результати розрахунку процесу формування зон залишкових напружень і пластичних деформацій при ударному впливі індентора. Встановлено, що при ударній дії індентора зі швидкісттю 10 м/с на зворотній поверхні пластини зі сплаву АМг6 величини пластичних деформацій є більшими, ніж на контактній. Це пояснюється ефектом відбиття пластично деформованого шару металу від зворотнього боку пластини, яка знаходиться в умовах спирання на жорстку опору. Проведено експериментальну перевірку адекватності моделі при оцінюванні розподілу пластичних деформацій після електродинамичної обробки зварної пластини зі сплаву АМг6. Бібліогр. 16, табл. 2, рис. 9.

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Elevation of the Fatigue Resistance of Welded Joints by Controlled Synchronization of Electrodynamic Actions

et al. 2022

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Effect of the Electrodynamic Treatment on the Life of AMg6 Aluminum Alloy Weld Joints

Cited by 17 publications

References 2 publications

Comparison of influence of pulsed effects of magnetic and electric fields on stressed state of welded joints of aluminium alloy AMG6

Comparison of influence of pulsed effects of magnetic and electric fields on stressed state of welded joints of aluminium alloy AMG6

Welding dissimilar high-strength nickel alloys in poly- and single-crystal combinations

Elevation of the Fatigue Resistance of Welded Joints by Controlled Synchronization of Electrodynamic Actions

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