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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Reuben, Bob
Heriot-Watt University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (32/32 displayed)
- 2023Laser-Induced Forward Transfer of Ni-rich NiTi Alloys for Shape Memory Applicationscitations
- 2022Laser induced forward transfer of NiTi deposits for functionally graded SMA components
- 2021Experimental investigation using acoustic emission technique for quasi-static cracks in steel pipes assessmentcitations
- 2018Flow noise identification using acoustic emission (AE) energy decomposition for sand monitoring in flow pipelinecitations
- 2017Dynamic instrumented palpation (DIP) - a new method for soft tissue quality assessment: application to prostate disease diagnosiscitations
- 2017Quantitative mechanical assessment of the whole prostate gland ex vivo using dynamic instrumented palpationcitations
- 2016Monitoring acoustic emission (AE) energy of abrasive particle impacts in a slurry flow loop using a statistical distribution modelcitations
- 2015Development of a novel actuator for the dynamic palpation of soft tissue for use in the assessment of prostate tissue qualitycitations
- 2015Monitoring acoustic emission (AE) energy in slurry impingement using a new model for particle impactcitations
- 2013Transmission of acoustic emission in bones, implants and dental materialscitations
- 2012Predicting acoustic emission attenuation in small steel blocks using a ray tracing techniquecitations
- 2012Statistical distribution models for monitoring acoustic emission (AE) energy of abrasive particle impacts on carbon steelcitations
- 2012Replacing diamond cutting tools with CBN for efficient nanometric cutting of siliconcitations
- 2012Molecular dynamics simulation model for the quantitative assessment of tool wear during single point diamond turning of cubic silicon carbidecitations
- 2012Acoustic emission monitoring of abrasive particle impacts on carbon steelcitations
- 2012The effect of coping/veneer thickness on the fracture toughness and residual stress of implant supported, cement retained zirconia and metal-ceramic crownscitations
- 2011Atomistic aspects of ductile responses of cubic silicon carbide during nanometric cuttingcitations
- 2011Indentation testing and its acoustic emission response: applications and emerging trendscitations
- 2011An improved measurement of Vickers indentation behaviour through enhanced instrumentationcitations
- 2011AE Monitoring and Analysis of HVOF Thermal Spraying Processcitations
- 2008Assessment of Surface Residual Stresses Generated during Machining of Metastable Austenitic Stainless Steel using Acoustic Emission
- 2006Compressive stress-strain behaviour of cast dental restorations in relation to luting cement distribution
- 2006Interferometric sensors for application in the bladder and the lower urinary tractcitations
- 2006Biomechanical properties of articular cartilage as a standard for biologically integrated interfaces
- 2006Application of acoustic emission for monitoring the HVOF thermal spraying processcitations
- 2005The effects of progressive wear on the frequency characteristic of acoustic emission acquired during face millingcitations
- 2005AE mapping of engines for spatially located time seriescitations
- 2004Design, manufacture and testing of a low-cost micro-channel cooling device
- 2004Acoustic emission from the tension fatigue of glass fibre reinforced plasticscitations
- 2004A new method for waveform analysis for estimating AE wave arrival times using wavelet decompositioncitations
- 2002Toward a better understanding of morphology changes in solders using phase field theories: Quantitative modeling and experimental verification
- 2000Adaptability of a tool wear monitoring system under changing cutting conditionscitations
Places of action
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document
Laser induced forward transfer of NiTi deposits for functionally graded SMA components
Abstract
<p>Laser-induced forward transfer (LIFT) is a 3D micro-fabrication tool wherein laser pulses are used to sequentially print thin sub-voxels of metal onto a substrate. We are developing a LIFT-based process to fabricate micron-scale parts with shape memory alloy (SMA) properties exploiting its high degree of spatial and temporal control. SMAs exhibit shape memory effect; during which they generate a substantial amount of strain or force, and hence can be used as the basis of actuators such as micro-grippers and fibre-optic manipulators, for surgical and other in-vivo medical applications. We are particularly interested in nickel-titanium (NiTi) SMAs given their biocompatibility and a transition temperature (the temperature at which the material returns to its initial state) close to body temperature. Small variations in chemical composition can be used to tune their transition temperature. However, compositional, and spatial control of these SMAs is limited to macroscopic manufacturing techniques. In this paper, we explore a novel approach to locally control the composition of NiTi alloy using LIFT. The donor is a multilayer comprising nickel and titanium thin films. During the transfer, the laser pulse melts and diffuses the metals forming a composite droplet. We demonstrate the possibility of obtaining NiTi deposits with equiatomic composition (50- 50 atomic %). Conventional SMAs have a narrow range of control parameters which makes it difficult for actuator design. However, by locally altering the composition, it would be feasible to locally tune the transformation window, providing a more complex response to temperature and hence a wide range of SMA based micro-actuator applications. </p>