Effect of process parameters on the residual stresses in AA5083-H321 friction stir welds

Lombard, H.; Hattingh, D.G.; Steuwer, A.; James, M.N.

doi:10.1016/j.msea.2008.09.078

Cited by 108 publications

(68 citation statements)

References 17 publications

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“…However, in fusion welds the total size of the tensile region is typically larger than the extent of the melted zone (Figure 3), corresponding instead to the extent of plastic deformation induced by thermal stress. Consequently, welding with a greater heat input generally results in a wider tensile region [11,15]. While simple in concept, residual stress formation in welds is quite difficult to predict quantitatively.…”

Section: Formation Of Residual Stresses During Weldingmentioning

confidence: 99%

“…The heat input is further constrained by factors relating to the welding process itself: in laser welding for example, reducing the heat input will eventually cause transition of the process from keyhole to conduction mode 6 . Therefore, control of welding heat input can never completely prevent residual stresses from forming, but it can reduce the width over which plastic strain (and hence tensile residual stress) occurs [11,15].…”

Section: Control Of Heat Input During Weldingmentioning

confidence: 99%

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Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. AbstractSelf-equilibrating residual stresses may occur in materials in the absence of external loading due to internal strain inhomogeneity. While favourable distributions of residual stress can bestow an object with the appearance of superior material properties, most welding processes leave behind residual stresses in particularly unfavourable patterns, causing a greater susceptibility to fracture-based failure mechanisms and unintended deformation. Currently, heat treatment is the primary means of removing these stresses, but since the formation of residual stress is dependent upon many material and process factors, there are several other viable mechanisms (using thermal, mechanical or phase transformation effects) by which it may be modified. It is only now, using relevant advances in numerical and experimental methods, that these techniques are being fully explored. This article gives a brief introduction to weld-induced residual stresses and reviews the current state-of-the-art with regard to their reduction. Emphasis is placed on the recent development of unconventional techniques, and the mechanisms by which they act.

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Section: Formation Of Residual Stresses During Weldingmentioning

confidence: 99%

Section: Control Of Heat Input During Weldingmentioning

confidence: 99%

Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

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“…Si bien esta distribución es prácticamente simétrica, las tensiones suelen ser levemente mayores del lado de avance (AS) [2,3].…”

Section: Introductionunclassified

“…En cuanto a la influencia de las variables de soldadura, se ha reportado que las tensiones longitudinales aumentan con la velocidad de avance [1,4] y al disminuir la velocidad de rotación [4], aunque otros autores han reportado que no se ven afectadas sensiblemente por este parámetro [2]. En este sentido, la magnitud de las tensiones residuales medidas, si bien se encuentran en el mismo orden, presentan variaciones de relativa importancia en función de otros aspectos como la geometría de la herramienta.…”

Section: Introductionunclassified

“…En este sentido, la magnitud de las tensiones residuales medidas, si bien se encuentran en el mismo orden, presentan variaciones de relativa importancia en función de otros aspectos como la geometría de la herramienta. Se ha intentado correlacionar la tensión residual con el calor aportado neto [2,5], reportándose una tendencia a disminuir el valor de dicha tensión residual con el aumento del aporte térmico, si bien la correlación es relativamente baja.…”

Section: Introductionunclassified

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Tensiones residuales en uniones soldadas por FSW en aluminio 7075-T651

2012

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Effect of process parameters on the mechanical behavior of additively manufactured and FSW joined PLA wood sheets

Koçar,

Anaç,

Palaniappan

et al. 2023

Polymer Composites

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Friction stir welding (FSW), a solid‐state joining method, is an innovative technique widely employed in the welding of thermoplastics, with broad application areas such as the automotive and aerospace industries. Due to its inherent advantages, including ease of processing, biodegradability, and printability, polylactic acid (PLA) and its derivatives are notably the most commonly used polymers in 3D printing. The limited print area of 3D printers necessitates post‐production joining processes. In this study, the weldability of plates obtained using PLA Wood filament through the FSW is evaluated. For this purpose, different pin geometries (triangle, square, and screw), feed rates (20, 40, and 60 mm/min), and tool rotation speeds (1250, 1750, and 2250 rpm) are employed. Visual inspections are conducted to determine the effects of process parameters on weld quality and to identify defects in the weld region. Temperature values are measured to investigate the influence of heat generated during the FSW process. Furthermore, after determining the highest weld strengths achieved for each pin geometry, the weldability of PLA Wood material with PLA‐CF and PLA Plus materials is investigated using these parameters. The results indicate that the highest weld quality for joining PLA Wood plates is achieved using the square pin geometry, 20 mm/min feed rate, and 1750 rpm with an efficiency of 74.5%. When welding PLA Wood with PLA‐CF and PLA Plus, high weld strengths are obtained using the same process parameters (square pin, 20 mm/min, and 1750 rpm).Highlights Friction stir welding process of 3D printed PLA Wood material. Friction stir welding process of dissimilar materials pairs. Effect of welding parameters on weld strength and hardness. Identifying the fracture surface images occurring in parts after friction stir welding. Examination of temperature generation during friction stir welding.

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Effect of process parameters on the residual stresses in AA5083-H321 friction stir welds

Cited by 108 publications

References 17 publications

Contemporary approaches to reducing weld induced residual stress

Contemporary approaches to reducing weld induced residual stress

Tensiones residuales en uniones soldadas por FSW en aluminio 7075-T651

Effect of process parameters on the mechanical behavior of additively manufactured and FSW joined PLA wood sheets

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