Influence of variable processing conditions on the quasi-static and dynamic behaviors of resistance spot welded aluminum 6061-T6 sheets

Turnage, S.; Darling, Kristopher A.; Rajagopalan, M.; Whittington, W.R.; Tschopp, Mark A.; Peralta, Pedro; Solanki, Kiran

doi:10.1016/j.msea.2018.03.120

Cited by 18 publications

(6 citation statements)

References 26 publications

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“…Исследованию особенностей контактной точечной сварки заготовок из алюминиевых сплавов посвящено значительное количество работ как отечественных, так и зарубежных авторов [1][2][3][4][5]. При этом основным видом оценки прочностных свойств сварных соединений является их статическая прочность на срез и на отрыв [6][7][8]. Эксплуатационные свойства сварных соединений в условиях знакопеременных нарезок исследованы гораздо менее полно.…”

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Study of Vibration Strength of D16 Aluminum Alloy Joints Welded Applying Resistance Spot Welding

Balashov

Zezyulya

Bulychev

et al. 2023

Proceedings of the SWSU

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Purpose of research is to develop and test a technique and perform an experimental study of the vibration strength of D16 aluminum alloy joints welded applying resistance spot welding.Methods. Test coupons were made from 1 mm thick D16 aluminum alloy sheet blanks applying resistance spot welding. A feature of the proposed test is the implementation of a symmetrical loading cycle. During the tests, the number of cycles to failure depending on the range of vibrations was recorded. Annealing and thermomechanical straightening were carried out to exclude helical bending after cutout. After deburring and root facing, the surface of the coupons was prepared for welding using chemical etching. The coupons were welded using a TECNA 8214N spot welding machine. The welding current was 30 kA, the welding duration was 0.1 s, the electrodes force was 180 daN. The static shear strength of the welded joint was studied using a UTS 110M-5 1-U tensile testing machine. The breaking force was 3.66 kN. The peculiarity of the proposed test is the implementation of a symmetrical loading cycle. During the tests, the number of cycles to failure depending on the range of vibrations was recorded.Results. As a result of the statistical analysis of the study results, a linear mathematical relationship between the logarithms of the number of cycles to failure and the amplitude of vibrations was obtained. Depending on the range of vibrations, characteristic zones of destruction were revealed. To provide the possibility of comparing the results of vibration obtained under different conditions of fixing the samples, it is proposed to use the range of vibration displacement per unit length of the work[iece as the ordinate.Conclusion. A technique or studying the vibrational strength of joints welded by resistance spot welding under conditions of a symmetrical loading cycle is proposed and tested. For the studied coupons, the equality of the welded joint to the base metal is achieved at the value of the logarithm of the ratio of the range of vibration displacement per unit length of the coupons equal to 0.01.

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Study of Vibration Strength of D16 Aluminum Alloy Joints Welded Applying Resistance Spot Welding

Balashov

Zezyulya

Bulychev

et al. 2023

Proceedings of the SWSU

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“…Durante a segunda guerra mundial, com uma grande necessidade de produção em massa, a indústria norte americana utilizou em grande escala o processo de soldagem por resistência elétrica. Por este motivo, numerosas aplicações foram descobertas, como por exemplo, na indústria aeronáutica com pesquisas e publicações para ligas não ferrosas principalmente o alumínio [28,29]. A importante difusão do processo de soldagem a ponto por resistência se deve em grande parte aos controles eletrônicos para o monitoramento dos parâmetros.…”

Section: Breve Histórico Da Soldagem a Ponto Por Resistência Elétricaunclassified

“…A resistividade do alumínio aumenta com a temperatura no estado sólido e líquido (durante a fusão), no entanto a resistência mecânica do alumínio diminui com aumento da temperatura, o que resulta num aumento da área de contato entre o eletrodo e a peça. Por conseguinte, devido ao aumento da área de contato, a resistência total diminui ligeiramente [10,29].…”

Section: Resistência Dinâmica De Contatounclassified

“…A soldagem a ponto por resistência elétrica fornece uma maneira rápida e econômica de unir todos os tipos de aços revestidos ou não revestidos, aços com alto ou baixo teor de carbono, aços tratáveis termicamente e aços inoxidáveis. Outros materiais, incluindo ligas de alumínio, titânio e cobre, também são comumente unidos por este processo de soldagem [24,29,85]. As principais vantagens no processo de soldagem a ponto são: alta velocidade e adaptabilidade à automação para a produção de estruturas, como exemplo: carroceria de automóvel [1,13,19].…”

Section: Ensaio Por Ultrassomunclassified

“…Os experimentos foram realizados em um equipamento com sistema servo hidráulico com controlador da marca MTS, modelo: 494.10 -Flex Test 100.Todos os ensaios foram realizados em temperatura ambiente, em carregamento cíclico com frequência de 20 Hz (onda senoidal), utilizando uma razão de tensão R = 0,1, seguindo as orientações da norma AWS B4.0:2007[123]. A razão de carga ou tensão (R) é a relação entre as amplitudes das tensões mínima e máxima, conforme mostra a equação(29) [81,82]: de tensão σmín. = Tensão mínima σmáx.…”

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Desenvolvimento de um processo de soldagem a ponto por resistência elétrica utilizando manufatura aditiva.

Batista¹

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For several decades, the electric resistance spot welding process has been widely used in the manufacture of sheet metal structures mainly in automotive bodies. It has been noted that during this period there was no significant development for this welding process. However, in the last few years, in order to meet the demand for lighter, more economical, safer and lower cost vehicles due to environmental requirements, the automotive manufacturing industry is undergoing a revolution in the use of combinations of steel sheets with high mechanical resistance, different chemical compositions and thicknesses. Within this context, the present work will be focused on the study and development of a new spot welding technology using additive manufacturing in zinc coated and uncoated steel sheets employed in the automotive industry. By way of comparison, a spot welding by the conventional process was also performed. In order to find the optimal welding parameters, weldability diagrams were made.Subsequently, using the optimized parameters, the mechanical properties were analyzed through tensile tests (tensile shear test, pull test and cross tension test) and fatigue tests in cyclic loads. In order to understand the phenomena occurred during welding, the behaviors of the dynamic resistances, the magnitudes of the welding electric energies, the force between the electrodes and the thermal expansion of the weld spot were studied and analyzed. For the analysis of the geometrical dimensions and the metallurgical phenomena of the weld spot, macrographs, micrographs, chemical composition and Vickers microhardness tests were performed. Corrosion tests were also carried out in salt spray on painted plates according to the automotive industry process. What stands out among the results is that the spot welding process using additive manufacturing (AMSW), through the optimized parameters, compared to the conventional spot welding process (RSW) showed higher efficiency in heat energy generation, lower force between the electrodes, higher maximum tensile stress in relation to the tests of: shear, pull and cross-tension (tensile perpendicular to the weld point).It was also observed that the fatigue limits showed no significant differences and that in the salt spray tests no corrosion was observed for both spot welding processes.

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Dislocations in AM and traditional manufacturing: A comparison

Pelleg

2020

Additive and Traditionally Manufactured Components

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Influence of variable processing conditions on the quasi-static and dynamic behaviors of resistance spot welded aluminum 6061-T6 sheets

Cited by 18 publications

References 26 publications

Study of Vibration Strength of D16 Aluminum Alloy Joints Welded Applying Resistance Spot Welding

Study of Vibration Strength of D16 Aluminum Alloy Joints Welded Applying Resistance Spot Welding

Desenvolvimento de um processo de soldagem a ponto por resistência elétrica utilizando manufatura aditiva.

Dislocations in AM and traditional manufacturing: A comparison

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