JLA Vol:20 Iss:1 (Optimization of production rate in diode laser hardening)
Authors:
Edoardo Capello
Barbara Previtali
Dipartimento di Meccanica, Politecnico di Milano, Via Bonardi 9, 20133 Milano, ItalyThe present paper is a contribution to the definition of optimal laser hardening conditions with production rate as the main goal. When the part to be treated is given, the optimization problem can be expressed in terms of minimal execution time subjected to two constraints: the depth of treatment and hardness of transformed layer. When the analytical expression of the objective function and the constraints was determined, the feasibility area was described and analyzed. Finally, an optimization algorithm was applied to identify the optimal solut...
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JLA Vol:23 Iss:1 (Optimal process parameters for thermoplastic polyetheretherketone joints fabricated using transmission laser welding and Lumogen<sup>®</sup> IR absorptive pigment)
Authors:
Negin Amanat
School of Physics, University of Sydney, New South Wales 2006, Australia and Cochlear Ltd., 14 Mars Rd., Lane Cove, New South Wales 2066, Australia
Cedric Chaminade
John Grace
Raymax Applications, P.O. Box 958, Newport Beach, New South Wales 2106, Australia
Natalie L. James
Cochlear Ltd., 14 Mars Rd., Lane Cove, New South Wales 2066, Australia
David R. McKenzie
School of Physics, University of Sydney, New South Wales 2006, AustraliaThis study investigates the effects of the process parameters (laser power and irradiation time) on the bond quality of transmission laser welded polyether...
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JLA Vol:7 Iss:2 (A study of polarization‐maintaining fiber characteristics with applications to force and displacement sensing)
Authors:
P. V. P. Yupapin
K. Weir
K. T. V. Grattan
A. W. PalmerAn experimental investigation of three different types of highly birefringent fiber sensor element configured as a force and a displacement sensor is described. From the coupling of power between the two eigenmodes, the magnitude of the force and the position of the coupling point can then be determined using ‘white‐light interferometric’ techniques.
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JLA Vol:25 Iss:3 (Surface tension stabilized laser welding (donut laser welding)—A new laser welding technique)
Authors:
Peter Haglund
Department of Engineering Sciences and Mathematics, Luleå University of Technology and Westinghouse Electric Sweden AB, SE-721 63 Va¨sterås, Sweden
Ingemar Eriksson
John Powell
Alexander Kaplan
Department of Engineering Sciences and Mathematics, Luleå University of TechnologyA new laser welding process is presented which delivers a porosity free, spatter free weld. The process involves a donut shaped melt with a central hole of the same order of magnitude as the material thickness. The laser illuminates only the leading section of this melt. The hole is kept open by the melt surface tension.
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JLA Vol:14 Iss:1 (Cutting of slate tiles by CO<sub>2</sub> laser)
Authors:
M. Boutinguiza
F. Lusquin˜os
J. Pou
R. Soto
F. Quintero
M. Pe´rez-Amor
Departamento Fı´sica Aplicada Universidade de Vigo, Lagoas Marcosende 9, E-36200 VIGO, Spain
K. Watkins
Laser Engineering Group, Department of Engineering, The University of Liverpool, Liverpool L69 3GH, United KingdomSlate is a natural stone which has the characteristic that shows a well-developed defoliation plane, allowing to easily split it in plates parallel to that plane which are particularly used as tiles for roof building. At present, the manufacturing of slate is mostly manual, bein...
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JLA Vol:18 Iss:2 (Investigation of the effects of nonconventional beam geometries in laser surface treatment of ceramics: Theoretical analysis)
Authors:
D. Triantafyllidis
Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M60 1QD, United Kingdom and Corrosion and Protection Centre, School of Materials, The University of Manchester, Manchester M60 IQD, United Kingdom
L. Li
Laser Processing Research Center, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M60 1QD, United Kingdom
F. H. Stott
Corrosion and Protection Centre, School of Materials, The University of Manchester, Manchester M60 1QD, United KingdomLaser surface treatment of ceramics by melting and re...
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