Fatigue assessment of friction stir channels

Vidal, Catarina; Infante, V.; Vilaça, Pedro

doi:10.1016/j.ijfatigue.2013.10.009

Cited by 16 publications

(10 citation statements)

References 4 publications

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“…The FSC manufacturing conditions for the samples used in this study resulted in a very rough surface. However, it is known from previous implementations using the same material that FSC-channels can be manufactured to be smoother [32] if needed. In fact, as heat transfer varies according to surface roughness and morphology of the channel, the heat transfer in channels produced by FSC can be continuously modified over the length by varying the manufacturing parameters such as travel and rotation speed and forging force.…”

Section: Experimental Thermal Resultsmentioning

confidence: 99%

“…Under this new concept, the combination of the geometrical features of the probe and shoulder and the process parameters all control the size and geometrical finishing of the channel internal surfaces. The fundamentals and parameters of the FSC technique and main features of the channels in aluminium alloy AA5083 are extensively addressed in Reference [31] and the fatigue properties characterized in References [31][32][33][34]. In this study, the FSC was applied to one monolithic plate as depicted in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Efficiency and Material Properties of Friction Stir Channelling Applied to Aluminium Alloy AA5083

et al. 2019

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The Friction Stir Channelling (FSC) is a novel advanced solution for producing internal closed channels along any desired path with a constant or continuously modified shape along the path in a single manufacturing step. The channels are formed by continuous extraction of part of the stirred processed material into external flash. In this work, the performance of channels with the same shape and dimensions but produced by FSC and milling respectively, are compared using an experimental calorimeter setup with a focus on the influence of the geometrical features of the channels on the thermal efficiency. The investigation is implemented in a plate of AA5083-H111, with a thickness of 10 mm. The material properties of the channels produced by FSC are investigated with a microhardness field and optical microscopic analysis, assessing the thermomechanically processed and heat affected zones. The mechanical resistance of the channels produced by FSC is evaluated with an application of internal pressure up to 380 bar. The results show that the FSC enhanced the heat transfer by about 45 % compared with smoother milled channels. The optical microscopy shows evidence of a good consolidation of the solid state joining mechanisms activated during the FSC, with a small reduction of the hardness around the channel in the stirred zone and heat affected zone, being assisted by a harder top region at the ceiling of the channel.

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Section: Experimental Thermal Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Efficiency and Material Properties of Friction Stir Channelling Applied to Aluminium Alloy AA5083

et al. 2019

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“…10c (at the AS), are geometrically similar to the ones resulting from application of conventional FSC. These zones were investigated by Vidal et al [9][10][11], reporting that the fracture under fatigue loading of all specimens took place in the interface at the AS, corresponding to the notch of Fig. 10c.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

“…By adjusting process parameters and tool features, it is possible to produce channels with wide range of dimensions. These channels are addressed by Vilaça et al [8] and extensively characterized by Vidal et al [9][10][11]. A significant benefit of using HFSC is that the channel can be produced in component systems involving thin workpieces, made of the same or different materials, instead of the thick monolithic preforms required in the FSC concepts.…”

Section: Introductionmentioning

confidence: 99%

Application of hybrid friction stir channeling technique to improve the cooling efficiency of electronic components

et al. 2018

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Hybrid friction stir channeling (HFSC) is a new friction stir-based method for producing internal, closed channels created simultaneously during welding of multiple metal plates. Differently from conventional friction stir channeling, that is only able to produce channels in a monolithic component, HFSC can be applied to complex structural systems involving multiple components made of similar or dissimilar materials. In this study, the channels manufactured by HFSC were open in a structural system made of AA5083, with one base plate of 5 mm thick, and one overlapping plate of 8 mm thick, used as a rib, containing the channel along conformal cooling path. The thermal performance of the HFSC channel is compared with a conventional channel, with similar shape and path, produced by milling. The channels being tested are part of an electronic device containing multiple heat sources. The HFSC channel presents 30 to 40% lower steady-state temperature and 33% higher cooling rate during the transient period than those of the milled version. Compared with the milled channel, the heat extraction capacity, per unit of mechanical pumping power, is higher for the HFSC channel. Surface roughness, microhardness, and microstructural analysis of HFSC channels are investigated to characterize the HFSC channel.

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“…Several studies have been published by Vidal et al [4][5][6][7] regarding the fatigue behaviour of friction stir channelling specimens but none of them present a comprehensive characterisation of the specimens' fatigue fracture surfaces. Thus, in this study the authors investigated the fatigue fracture mechanisms of friction stir channelling specimens at room temperature, 120ºC and 200ºC.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of fatigue fracture surfaces of friction stir channelling specimens tested at different temperatures

Vidal

Infante

Vilaça

2015

Engineering Failure Analysis

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Fatigue assessment of friction stir channels

Cited by 16 publications

References 4 publications

Thermal Efficiency and Material Properties of Friction Stir Channelling Applied to Aluminium Alloy AA5083

Thermal Efficiency and Material Properties of Friction Stir Channelling Applied to Aluminium Alloy AA5083

Application of hybrid friction stir channeling technique to improve the cooling efficiency of electronic components

Characterisation of fatigue fracture surfaces of friction stir channelling specimens tested at different temperatures

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