ICALEO 2008 Paper #P146 (Laser Concrete Ablation Scaling Effects)
Laser Concrete Ablation Scaling Effects
Authors:
D.O. Maccallum, Sandia National Laboratories; Albuquerque NM USA
J.T. Norris, Sandia National Laboratories; Albuquerque NM USA
Presented at ICALEO 2008
Surface scabbling of concrete by laser processing has been demonstrated in the literature for large-area problems (~50 mm wide x 10 deep) using physically large, high-power consumption, multi-kW CW laser systems. With large spot diameters (~50 mm) and low power densities (~ 300 W/cm2), large volume thermal stresses are induced which promote concrete cracking. This process is highly power-density and heat-input (J/m) dependent. Too high power densities cause melting and generate pot...$28.00
ICALEO 2008 Paper #P144 (Experimental Determination of Linear Electro-Optic Tensor in Crystal Materials of Different Symmetry)
Experimental Determination of Linear Electro-Optic Tensor in Crystal Materials of Different Symmetry
Authors:
Andriy Lavinskyy, National Energy Company; Lviv Ukraine
Anatoliy Andrushchak, Lviv Polytechnic National University; Lviv Ukraine
Andriy Kityk, Politechnika Cztochowska; Cztochowa Poland
Presented at ICALEO 2008
This work presents the technique suitable for the determination of the linear electro-optic effect tensor components in crystal materials of any symmetry. The method is based on the Michelson interferometer where the sample being studied is set into the one of its arms to measure the electro-induced changes of the optical path. We describe in detai...$28.00
ICALEO 2008 Paper #P138 (Experimental Investigation of Laser Shock Peening for a Zinc-Coated Low Carbon Steel Using Femtosecond Laser Pulses)
Experimental Investigation of Laser Shock Peening for a Zinc-Coated Low Carbon Steel Using Femtosecond Laser Pulses
Authors:
Dongkyun Lee, The University of Michigan; Ann Arbor MI USA
Elijah Kannatey-Asibu Jr, The University of Michigan; Ann Arbor MI USA
Presented at ICALEO 2008
In this study, the feasibility of laser shock peening using ultrafast laser pulses was experimentally investigated. A top coating of zinc with a water confining layer was applied in the investigation. The zinc coating was used for the thermo-protective effect, and also for in-situ investigation on the feasibility of laser microwelding using femtosecond laser pulses. A high numerical aperture aspheric lens w...$28.00
ICALEO 2008 Paper #P137 (3D-Analysis of Spatial Anisotropy for Linear Electro-optic Effect in Crystal Materials: Geometry Determination of the Most Efficient Electro-Optic Coupling)
3D-Analysis of Spatial Anisotropy for Linear Electro-optic Effect in Crystal Materials: Geometry Determination of the Most Efficient Electro-Optic Coupling
Authors:
Anatoliy Andrushchak, Lviv Polytechnic National University; Lviv Ukraine
Bohdan Mytsyk, Karpenko Physico-Mechanical Institute; Lviv Ukraine
Andriy Lavinskyy, National Energy Company; Lviv Ukraine
Natalya Demyanyshyn, Karpenko Physico-Mechanical Institute; Lviv Ukraine
Oleg Yurkevych, Lviv Polytechnic National University; Lviv Ukraine
Andriy Kityk, Institute for Computer Science, Department of Electrical Engineering, Czestochowa University of Technology; Czestochowa Poland
W...$28.00
ICALEO 2008 Paper #P130 (Effect of Laser Fluence on the Ablation Rate of Metals in the Infrared, Visible, and Ultraviolet Nanosecond Pulses Irradiation Regime)
Effect of Laser Fluence on the Ablation Rate of Metals in the Infrared, Visible, and Ultraviolet Nanosecond Pulses Irradiation Regime
Authors:
Mihai Stafe, Univesity 'Politehnica' of Bucharest; Bucharest Romania
Ionut Vladoiu, Univesity 'Politehnica' of Bucharest; Bucharest Romania
Constantin Negutu, Univesity 'Politehnica' of Bucharest; Bucharest Romania
Ion M. Popescu, Univesity 'Politehnica' of Bucharest; Bucharest Romania
Presented at ICALEO 2008
We investigated the dependence of the ablation rate of metals on the fluence of nanosecond laser pulses with wavelengths of 1064, 532 and respectively 355 nm in atmospheric air. We assessed the ablation rate f...$28.00
ICALEO 2008 Paper #P126 (Effect of Annealing Parameters on the Shape Memory Properties of Niti Thin Films)
Effect of Annealing Parameters on the Shape Memory Properties of Niti Thin Films
Authors:
Gen Satoh, Columbia University; New York NY USA
Andrew Birnbaum, Columbia University; New York NY USA
Y. Lawrence Yao, Columbia University; New York NY USA
Presented at ICALEO 2008
Sputter deposition was used to deposit amorphous, 1μm thick, Ti-rich NiTi films on silicon substrates which were annealed at various times and temperatures to alter their microstructure. The effects of heat treatments on the shape memory and mechanical properties of the films were analysed through temperature dependent x-ray diffraction and nanoindentation. These heat treatments were shown to affect th...$28.00
ICALEO 2008 Paper #P125 (Integrated Laser Beam Hardening in Turning Machines for Process Chain Reduction)
Integrated Laser Beam Hardening in Turning Machines for Process Chain Reduction
Authors:
Steffen Bonss, Fraunhofer Iws; Dresden Germany
Jan Hannweber, Fraunhofer Iws Dresden; Dresden Germany
Udo Karsunke, Fraunhofer Iws Dresden; Dresden Germany
Stefan Kuehn, Fraunhofer Iws Dresden; Dresden Germany
Marko Seifert, Fraunhofer Iws Dresden; Dresden Germany
Eckhard Beyer, Fraunhofer Iws Dresden; Dresden Germany
Grischa-Norman Drollinger, Bosch Rexroth Ag; Lohr Am Main Germany
Presented at ICALEO 2008
Laser beam hardening has been established during the last years as a complementary technology for local heat treatment tasks ...$28.00
ICALEO 2008 Paper #P122 (Fully Closed-Loop Semi-Automatic Laser Cladding Cell in a Serial Production of Small Tools)
Fully Closed-Loop Semi-Automatic Laser Cladding Cell in a Serial Production of Small Tools
Authors:
Jari Tuominen, Tampere University of Technology; Tampere Finland
Jyrki Latokartano, Institute of Production Engineering, Laser Application Laboratory, Tampere University of Technology; Tampere Finland
Petri Vuoristo, Tampere University of Technology; Tampere Finland
Presented at ICALEO 2008
Various small metal forming tools made of quenched and tempered hot work tool steels are susceptible to serious scuffing at high temperatures, thermal softening and fatigue leading to premature failures and extra interruptions in production due to tool replacements. Laser cladding com...$28.00
ICALEO 2008 Paper #P119 (Continuous Laser Process of Welding and Heat Treatment for Stress Improvement Joining)
Continuous Laser Process of Welding and Heat Treatment for Stress Improvement Joining
Authors:
Ryoichi Kuwano, Polytechnic University; Sagamihara, Kanagawa Japan
Tsuyoshi Tokunaga, Chiba Institute of Technology; Narashino, Chiba Japan
Yoshiki Nagano, Saitama University; Saitama, Saitama Japan
Toshiyuki Miyazaki, Chiba Institute of Technology; Narashino Japan
Presented at ICALEO 2008
For welding cast iron, such is a kind of high carbon materials, a continuous process of laser welding and laser heat treatment is proposed. These materials tend to form cracks during cooling period after welding, therefore the process is designed to obtain low cooling rate and ...$28.00
ICALEO 2008 Paper #P116 (Wettability Characteristics Variation of Nylon 6,6 by Means of CO2 Laser Generated Surface Patterns)
Wettability Characteristics Variation of Nylon 6,6 by Means of CO2 Laser Generated Surface Patterns
Authors:
David Waugh, Loughborough University; Loughborough Great Britain
Jonathan Lawrence, Loughborough University; Loughborough Great Britain
Presented at ICALEO 2008
CO2 lasers can be seen to lend themselves to materials processing applications. These types of lasers have been used extensively in research and industry with the work carried out being well documented. This work investigated the surface modification of nylon 6,6 with a laser in order to vary wettability characteristics. The wettability characteristics of the nylon 6,6 were modified by generating a number of patter...$28.00
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