Ultrasonic consolidation for embedding SMA fibres within aluminium matrices

Kong, C.Y.; Soar, Rupert; Dickens, Phill

doi:10.1016/j.compstruct.2004.04.064

Cited by 96 publications

(77 citation statements)

References 10 publications

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“…The composites envisaged find applications in adaptive or smart structures that can monitor their condition, control, or even, heal damage and adapt to environments [75,76].…”

Section: Ultrasonic Weldingmentioning

confidence: 99%

Welding and Joining of NiTi Shape Memory Alloys: A Review

Oliveira

Miranda

Fernandes

2017

Progress in Materials Science

269

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“…The composites envisaged find applications in adaptive or smart structures that can monitor their condition, control, or even, heal damage and adapt to environments [75,76].…”

Section: Ultrasonic Weldingmentioning

confidence: 99%

Welding and Joining of NiTi Shape Memory Alloys: A Review

Oliveira

Miranda

Fernandes

2017

Progress in Materials Science

269

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“…The material was chosen due to its use in earlier UC studies on fibre embedding (Yang et al, 2010) Prior to the laser processing, samples were manufactured using Loughborough University's Alpha 2 UC machine. The machine was supplied by Solidica INC., USA and had been used in several previous UC studies (Kong, 2004;). Variable process parameters of the UC machine are: sonotrode oscillation amplitude (µm), welding speed (mm/s) and welding force (N).…”

Section: Methodsmentioning

confidence: 99%

“…A schematic overview of the process is given in Figure 1(a). Two key aspects of UC are: Firstly, bond formation is achieved at temperatures lower, (typically ≤ 50 %), than the melting temperature of the foil material (Kong, 2004). Secondly, highly localised plastic flow occurs during ultrasonic 5 excitation of the metal foil (Langenecker, 1966).…”

mentioning

confidence: 99%

Fiber laser induced surface modification/manipulation of an ultrasonically consolidated metal matrix

Masurtschak

Friel

Gillner

et al. 2013

Journal of Materials Processing Technology

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Ultrasonic Consolidation (UC) is a manufacturing technique based on the ultrasonic joining of a sequence of metal foils. It has been shown to be a suitable method for fiber embedment into metal matrices. However, integration of high volume fractions of fibers requires a method for accurate positioning and secure placement to maintain fiber layouts within the matrices. This paper investigates the use of a fiber laser for microchannel creation in UC samples to allow such fiber layout patterns. A secondary goal, to possibly reduce plastic flow requirements in future embedding processes, is addressed by manipulating the melt generated by the laser to form a shoulder on either side of the channel. The authors studied the influence of laser power, traverse speed and assist gas pressure on the channel formation in aluminium alloy UC samples. It was found that multiple laser passes allowed accurate melt distribution and channel geometry in the micrometre range. An assist gas ai ded the manipulation of the melted material

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“…The elastic and thermal mismatches between the oxides and the base metal help this removal process [1]. This surface cleanup process is essential for atomic bonding, which generally depends on close contact and a surface area free of oxides and contaminants available for atomic diffusion [2]. It is reported that no surface preparation prior to consolidation is necessary [3] even if a tenacious oxide layer is present.…”

Section: Introductionmentioning

confidence: 99%

Thermal modeling during continuous ultrasonic welding

Şahi̇n¹,

Koellhoffer²,

Gillespie³

et al. 2014

Turkish J Eng Env Sci

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Abstract:In this study, a thermal model during continuous ultrasonic welding of thin foils has been developed. The heat generation during the process, stick/slip state, and effect of elastic/plastic strains are included in the formulation. The physics is simplified to a one-dimensional transient heat transfer analysis, the governing equation is nondimensionalized, and important parameters are identified. A fourth-order Runge-Kutta numerical scheme is used to predict the transient temperature as a function of material, constitutive, and process parameters. Comparison with experimental results is provided to justify the assumptions introduced in the model. Different heat generation terms are introduced and their contribution to overall heat generation is presented.

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Ultrasonic consolidation for embedding SMA fibres within aluminium matrices

Cited by 96 publications

References 10 publications

Welding and Joining of NiTi Shape Memory Alloys: A Review

Welding and Joining of NiTi Shape Memory Alloys: A Review

Fiber laser induced surface modification/manipulation of an ultrasonically consolidated metal matrix

Thermal modeling during continuous ultrasonic welding

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