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Purpose - The purpose of this paper is to investigate the effect of the main process parameters of laser melting (LM) type additive manufacturing (AM) on multi-layered structures manufactured from JSC-1A Lunar regolith (Moondust) simulant powder. Design/methodology/approach - Laser diffraction technology was used to analyse and confirm the simulant powder material particle sizes and distribution.
The reliance on market solutions by the Swedish public sector has increased significantly in recent decades. The Swedish example is characterized by an openness to market solutions in many public-sector activities and by a mix of procurement arrangements and choice-based arrangements. The overall experience is that the consequences of the extension of market solutions have been less profound than
Ultrasonic Additive Manufacturing (UAM) enables the integration of a wide variety of components into solid metal matrices due to the process induced high degree of metal matrix plastic flow at low bulk temperatures. Exploitation of this phenomenon allows the fabrication of previously unobtainable novel engineered metal matrix components.The feasibility of directly embedding electrical materials wi
Ultrasonic Additive Manufacturing (UAM) is an advanced manufacturing technique, which enables the embedding of electronic components and interconnections within solid aluminium structures, due to the low temperature encountered during material bonding. In this study, the effects of ultrasonic excitation, caused by the UAM process, on the electrical properties and the microstructure of thermally cu
Ultrasonic consolidation (UC) has been proven to be a suitable method for fiber embedment into metal matrices. To aid successful embedment of high fiber volumes and to ensure their accurate positioning, research on producing microchannels in combination with adjacent shoulders formed by distribution of the melt onto unique UC sample surfaces with a fiber laser was carried out. This paper investiga
The formation of smart, Metal Matrix Composite (MMC) structures through the use of solid-state Ultrasonic Additive Manufacturing (UAM) is currently hindered by the fragility of uncoated optical fibers under the required processing conditions. In this work, optical fibers equipped with metallic coatings were fully integrated into solid Aluminum matrices using processing parameter levels not previou
This chapter explores the ultrasonic additive manufacturing (UAM) advanced solid-state metal additive/subtractive manufacturing process that combines ultrasonic welding and computer numerical control milling to fabricate solid metal components, layer-by-layer, from metal foils. The chapter will discuss the three key abilities of UAM: complicated geometries, dissimilar material bonding, and object
Ultrasonic Additive Manufacturing (UAM), or Ultrasonic Consolidation as it is also referred, is a hybrid form of manufacture, primarily for metal components. The unique nature of the process permits extremely novel functionality to be realised such as multi-material structures with embedded componentry. UAM has been subject to research and investigation at Loughborough University since 2001. This
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 u
Ultrasonic Additive Manufacturing (UAM) has been subject to research and investigation at Loughborough University since 2001. In recent years, three particular areas of significant focus have been: The influence of pre-process material texture on interlaminar bonding. Secure fibre positioning through laser machined channels. Freeform electrical circuitry integration. This paper details the key fin
Ultrasonic Consolidation (UC) is an additive manufacturing technology which is based on the sequential solid-state ultrasonic welding of metal foils. UC presents a rapid and adaptive alternative process, to other metal-matrix embedding technologies, for 'smart' metal composite material production. A challenge that exists however relates to optimising, for bond density and plastic flow, the interla
Ultrasonic Consolidation (UC) is a manufacturing technique based on the ultrasonic metal welding of a sequence of metal foils which are bonded to one another in a layer by layer manner. It combines the ability of additive and subtractive manufacturing techniques to create complex three-dimensional shapes. Due to moderate applied pressures and the relatively low temperatures experienced by a sample
Future 'smart' structures have the potential to revolutionize many engineering applications. One of the possible methods for creating smart structures is through the use of shape memory alloy (SMA) fibres embedded into metal matrices. Ultrasonic consolidation (UC) allows the embedding of SMAs into metal matrices while retaining the SMA's intrinsic recoverable deformation property. In this work, Ni
Yacon (Smallanthus sonchifolius Poepp. & Endl.) roots are largely grown in Andean countries and have attracted recent interest due to their antioxidant and prebiotic effects. Yacon is typically consumed as a fruit due to its sweet taste and juiciness. The macromolecular properties of an aqueous extract of yacon are investigated using asymmetric flow field-flow fractionation (AF4) coupled to UV
Periodiska systemet växer - existensen av nya supertunga grundämnen rapporteras och verifieras fortlöpande allteftersom acceleratortekniken och analysmetoderna blir alltmer kraftfulla. Vi talar om enstaka atomer av mycket kortlivade isotoper, framställda genom kärnreaktioner. Deras kemi är av naturliga skäl outforskad.Verifiering och namngivning av dessa grundämnen är en komplicerad procedur.
Myelin-sensitive quantitative (q) MRI techniques including MT (3D FLASH) and DTI (single-shot STEAM) are of growing importance to study white matter (WM) disorders in childhood. Cerebral folate transport deficiency is an inherited, treatable WM disorder with hypomyelination, developmental regression, movement disturbances, and epilepsy. One patient with this diagnosis and severe phenotype was trea
Artikeln ger en sammanfattning av IUPAC:s rekommendationer år 1994 för namnen på de nya grundämnena 101-109, de s.k. transfermierna. Rekommendationerna publiceras senare under 2014 i Pure and Applied Chemistry, Vol 66 Nr 12. Dessa rekommendationer skall under år 1995 ytterligare granskas/ratificeras av IUPACs Council, vilket slutligen kan resultera i ändringar eller omflyttningar.
The last five years of unfolding political unrest in Egypt and beyond has urged research to explore activism beyond civil society and NGO-work in the region. This has generated a turn towards social movement theory (SMT) which has revealed both the limits and possibilities of SMT when applied to different sites of the Arab world (Akder 2013, Durac 2015, Tadros 2011). While the dominant focus has b
Objective: To validate the prediction model for successful vaginal birth after cesarean delivery (VBAC) based on variables easily obtainable at the first antenatal visit, in a Spanish population. Methods: Retrospective observational study. Women with a single live fetus in cephalic presentation with one previous low-transverse CD who underwent trial of labor after cesarean delivery (TOLAC) at ≥37
