PICALO 2006
Page: 1, 2, 3
PICALO 2006 Paper #1002 (Study of the Interplay of Vaporisation, Melt Displacement and Melt Ejection Mechanisms Under Single and Multiple Pulse Irradiation)
PIC06_1002
Study of the Interplay of Vaporisation, Melt Displacement and Melt Ejection Mechanisms Under Single and Multiple Pulse IrradiationAuthors:
J.M. Fishburn, Centre for Lasers and Applications, Macquarie University; Sydney Australia
Michael Withford, Centre for Lasers and Applications; Sydney Australia
D.W. Coutts, Centre for Lasers and Applications, Macquarie University; Sydney Australia
J.A. Piper, Centre for Lasers and Applications, Macquarie University; Sydney Australia
Presented at PICALO 2006
We have used a combination of profilometry, high speed imaging and recoil measurements using a ballistic pendulum to calculate the amount of material removed due t...
$28.00 (USD)
PICALO 2006 Paper #1003 (High Precision Laser Drilling with Ultra Short Pulses – Fundamental Aspects and Technical Applications)
PIC06_1003
High Precision Laser Drilling with Ultra Short Pulses – Fundamental Aspects and Technical ApplicationsAuthors:
Christian Foehl, Forschungsgesellschaft Fuer Strahlwerkzeuge MbH; Stuttgart Germany
Friedrich Dausinger, Institut fuer Strahlwerkzeuge IFSW; Stuttgart Germany
Presented at PICALO 2006
In various industrial applications, for example in the automotive industry, the fabrication of micro-holes in metals is required. One application with the highest requirements is the production of fuel injection nozzles for diesel engines in the automotive industry. More and more smaller holes with well defined geometries are required to reach a more efficient combustion and to reduce the...
$28.00 (USD)
PICALO 2006 Paper #1004 (Laser Cutting and Joining of Wooden Materials: How Both Processes are Determined by the Heat Affected Zone)
PIC06_1004
Laser Cutting and Joining of Wooden Materials: How Both Processes are Determined by the Heat Affected ZoneAuthors:
Stephan Barcikowski, Laser Zentrum Hannover E.V.; Hannover Germany
Presented at PICALO 2006
Wood and wood-derived materials are the most important materials with a world production of roughly 109 tons per year. However, because of the continuous development of the thermal and mechanical properties of wood materials towards high-tech applications, increasingly precise manufacturing processes have become attractive. In this contribution, the potential of laser cutting as well as laser welding of wooden materials is examined by quality-relevant material and process parameters as well...
$28.00 (USD)
PICALO 2006 Paper #1005 (Laser Cutting Ceramics using the Unstable Fracture Technique)
PIC06_1005
Laser Cutting Ceramics using the Unstable Fracture TechniqueAuthors:
Chwan-Huei Tsai, Huafan University; Taipei Hsien Taiwan
Jian-Shiun Shiu, Huafan University; Taipei Hsien Taiwan
Presented at PICALO 2006
This study proposes a new laser cutting method that uses the unstable fracture technique. In this method, a diamond blade is used to scribe a groove along the desired cutting path in an alumina substrate. A defocused CO2 laser is applied to the substrate surface. As the laser moves a short distance, a short crack is generated through the edge of the substrate. When the laser direction is reversed to close the crack tip, a great thermal stress is induced at the crack tip and caus...
$28.00 (USD)
PICALO 2006 Paper #1006 (Comparison of Front and Back Laser Irradiation in Laser Cleaning of Silica Particles from Silica Glass)
PIC06_1006
Comparison of Front and Back Laser Irradiation in Laser Cleaning of Silica Particles from Silica GlassAuthors:
Adam Joyce, Department of Physics; Sydney Australia
Deb Kane, Macquarie University; Sydney Australia
Presented at PICALO 2006
Laser cleaning of micron and sub-micron particles from various substrates such as silicon wafers and glass has been an active area of research in laser processing. Both understanding the fundamental physics of the light/particle/surface interaction and the development of successful cleaning protocols for industrial application have been drivers. Several groups have observed that directing the laser beam through a semi-transparent or transparent sam...
$28.00 (USD)
PICALO 2006 Paper #1007 (Cleaning Oxides from Copper Artifacts using a Frequency-doubled Nd:YAG Laser)
PIC06_1007
Cleaning Oxides from Copper Artifacts using a Frequency-doubled Nd:YAG LaserAuthors:
Alexander Kaplan, Luleå University of Technology; Lulea Sweden
Yang Sook Koh, Kiruna Center for Conservation of Property; Kiruna Sweden
John Powell, Laser Expertise Ltd.; Nottingham Great Britain
Göran Åberg, Luleå University of Technology; Luleå Sweden
Johnny Grahn, Luleå University of Technology; Luleå Sweden
Presented at PICALO 2006
This paper presents the results of an experimental program investigating the ablation of oxides from copper alloy surfaces using a frequency doubled Nd:YAG Laser. One eventual use for this technique would be in the feild...
$28.00 (USD)
PICALO 2006 Paper #101 (Application Potential of Laser with Strong Focusability)
PIC06_101
Application Potential of Laser with Strong FocusabilityAuthors:
Christoph Deininger, Institut für Strahlwerkzeuge; Stuttgart Germany
Friedrich Dausinger, Institut fuer Strahlwerkzeuge; Stuttgart Germany
Jan Weberpals, Institut für Strahlwerkzeuge; Stuttgart Germany
Presented at PICALO 2006
Thin disk lasers as well as fibre lasers are distinguished by their good focusability and high efficiency. With the availability of the 4 kW thin disk laser, keyhole welding with focus diameters down to 75 µm became possible. This allows comparing the influence on the welding depth of the different focus diameter regimes that can be typically realized by lamp-pumped solid state a...
$28.00 (USD)
PICALO 2006 Paper #102 (New Considerations and Experimental Results on Laser Lap Welding of Zinc Coated Steel Sheets)
PIC06_102
New Considerations and Experimental Results on Laser Lap Welding of Zinc Coated Steel SheetsAuthors:
Muhammad Muddassir Gualini, Pakistan Institute of Lasers and Optics; Islamabad Pakistan
Presented at PICALO 2006
Laser lap welding of zinc coated sheets needs still investigations in order to be properly inserted in production line. We have investigated several methods and already proposed a combined solution of cutting a slot and welding it over by a combined tandem of laser beams. We have further investigated the solution with theoretical and experimental work. We present our latest findings.
$28.00 (USD)
PICALO 2006 Paper #103 (Laser Welding with or without Shielding Gas?)
PIC06_103
Laser Welding with or without Shielding Gas?Authors:
Mark Faerber, LINDE AG; Hamburg Germany
Presented at PICALO 2006
Customers like to avoid expensive helium based shielding gases and thus laser welding without any gas is increasingly becoming popular. In practice, this means air is used as shielding gas and a mixture of oxygen and nitrogen, respectively. Both gases are effected by laser beam and plasma plume, these are dissociated and ionized and thus activated. Oxygen forms oxides which affect fatigue strength, nitrogen and nitrides affect formability of laser welded material. Degree of activation is influenced by type of laser and related temperature/ density of plasma plume. YAG lasers wo...
$28.00 (USD)
PICALO 2006 Paper #104 (Laser Joining of Aluminium to Titanium with Focus on Aeronautical Applications)
PIC06_104
Laser Joining of Aluminium to Titanium with Focus on Aeronautical ApplicationsAuthors:
Florian Wagner, BIAS Bremer Institut Fuer Angewandte Strahltechnik; Bremen Germany
Frank Vollertsen, BIAS Bremer Institut fuer angewandte Strahltechnik; Bremen Germany
Michael Kreimeyer, BIAS Bremer Institut fuer angewandte Strahltechnik; Bremen Germany
Rainer Kocik, Airbus Deutschland GmbH; Bremen Germany
Harald Kohn, BIAS; Germany
Presented at PICALO 2006
For aeronautical applications, hybrid structures made of titanium and aluminium alloys offer advantages in comparison to conventional designs. Due to the demands of the aircraft industry for new materi...
$28.00 (USD)
PICALO 2006 Paper #106 (Enhancement of Weld Seam Quality by Appropriate Laser Beam Guiding for Contour Welding of Thermoplastics)
PIC06_106
Enhancement of Weld Seam Quality by Appropriate Laser Beam Guiding for Contour Welding of ThermoplasticsAuthors:
Alexander von Busse, Laser Zentrum Hannover e.V.; Hannover Germany
Mireia Fargas, Laser Zentrum Hannover E.V.; Hannover Germany
Oliver Meier, Laser Zentrum Hannover e.V.; Hannover Germany
Ben Boese, Laser Zentrum Hannover e.V.; Hannover Germany
Presented at PICALO 2006
Laser transmission welding (LTW) of thermoplastics is gaining increasingly importance as an alternative welding process in comparison to the conventional processes (like heated tool welding, friction welding or induction welding) due to its advantages as high flexibility, low mec...
$28.00 (USD)
PICALO 2006 Paper #107 (Transmission Laser Welding of Polymers using Laser Additives)
PIC06_107
Transmission Laser Welding of Polymers using Laser AdditivesAuthors:
Peter Roberts, BASF; Melbourne Australia
Simon Doe, CSIRO; Adelaide Australia
Presented at PICALO 2006
Many polymers need to be joined allowing complex shapes to be processed, and welding is one process that may be employed. Transmission laser welding of thermoplastic polymers is a well established process, and is often used. To ensure that the weld occurs between the layers of plastic it is necessary for one of the plastics to be transmissive to laser light and the other to absorb the laser energy, to ensure that the beam focuses on the joint region. The traditional method has been to load the lower component wi...
$28.00 (USD)
PICALO 2006 Paper #108 (Comparison of Linear and Spinning Laser Beam Technologies for Welding of Thermoplastics to Timber)
PIC06_108
Comparison of Linear and Spinning Laser Beam Technologies for Welding of Thermoplastics to TimberAuthors:
Bjoern Kretschmer, Swinburne University of Technology; Melbourne Australia
Milan Brandt, IRIS, Swinburne Univ. of Technology; Melbourne Australia
A. Ostendorf, Laser Zentrum Hannover; Hannover Germany
D. Herzog, Laser Zentrum Hannover; Hannover Germany
J. Harris, IRIS, Swinburne Univ. of Technology; Melbourne Australia
S. Barcikowski, Laser Zentrum Hannover; Hannover Germany
Presented at PICALO 2006
The fundamentals of the spinning laser beam process for welding of wood fiber composites to thermoplastics are discussed in this...
$28.00 (USD)
PICALO 2006 Paper #201 (Analysis and Digitalization of Expert’s Skills for Laser Welding Using Analytic Hierarchy Process (AHP))
PIC06_201
Analysis and Digitalization of Expert’s Skills for Laser Welding Using Analytic Hierarchy Process (AHP)Authors:
Naoki Seto, National Institute of AIST, Digital Manufacturing Research Center; Tsukuba, Ibaraki Japan
Shingo Hirose, National Institute of AIST; Tsukuba, Ibaraki Japan
Kazuo Mori, National Institute of AIST, Digital Manufacturing Research Center; Tsukuba, Ibaraki Japan
Presented at PICALO 2006
In laser welding, the operator set welding parameters based on his long experience and knowledge before the operation. Since the parameter setting effects on welding quality greatly, it is very important that expert's experience and knowledge is expected to be transf...
$28.00 (USD)
PICALO 2006 Paper #202 (Effect of Laser Welding Parameters on Welding Defects Analyzed by the Analytic Hierarchy Process)
PIC06_202
Effect of Laser Welding Parameters on Welding Defects Analyzed by the Analytic Hierarchy ProcessAuthors:
Naoki Seto, National Institute of AIST; Tsukuba, Ibaraki Japan
Kazuo Mori, Digital Manufacturing Research Center, National Institute of AIST; Tsukuba, Ibaraki Japan
Shingo Hirose, Digital Manufacturing Research Center, National Institute of AIST; Tsukuba, Ibaraki Japan
Presented at PICALO 2006
The analytic hierarchy process (AHP) has been widely used for the decision-making method. By adapting AHP in laser welding, we think that we can analyze expert's skills. In this presentation, we investigate the effect of laser parameters on welding defects using AHP in case o...
$28.00 (USD)
PICALO 2006 Paper #203 (Effects of Strain Rate on the Properties of Laser Welded High Pressure Die Cast AM50 and AM60 Alloys)
PIC06_203
Effects of Strain Rate on the Properties of Laser Welded High Pressure Die Cast AM50 and AM60 AlloysAuthors:
William (Wei) Song, CRC CAST, Industrial Research Institute Swinburne (IRIS); Hawthorn, VIC Australia
Yvonne Durandet, CRC CAST, IRIS, Swinburne Univ. of Technology; Hawthorn, VIC Australia
Jim Harris, CRC CAST, IRIS, Swinburne Univ. of Technology; Hawthorn Australia
Milan Brandt, CRC CAST, Industrial Research Institute Swinburne (IRIS); Hawthorn, VIC Australia
Presented at PICALO 2006
The influence of strain rate on the properties of laser welded AM50 and AM60 magnesium alloys has been investigated. Butt welding without filler material was conduc...
$28.00 (USD)
PICALO 2006 Paper #204 (The Effects of Laser Process Parameters on the Weldability of Lap Joints between Aluminum Alloy (AA5052) and Magnesium Alloy (AZ31B))
PIC06_204
The Effects of Laser Process Parameters on the Weldability of Lap Joints between Aluminum Alloy (AA5052) and Magnesium Alloy (AZ31B)Authors:
Han-Sur Bang, Chosun University; Gwangju Korea
Nazmul Alam, CSIRO; Adelaide Australia
Young-Pyo Kim, CSIRO; Adelaide Australia
Presented at PICALO 2006
In the automotive industries, one of the main issues is to reduce the weight of structures for saving fuel consumption, prevention of air pollution and improvement of performance. For this purpose, many efforts have been tried to substitute standard material of car body by using light metal alloys. Therefore, technical and economical needs for joining of dissimilar metals by joini...
$28.00 (USD)
PICALO 2006 Paper #301 (Laser Cladding Repair of LP Steam Turbine Blades)
PIC06_301
Laser Cladding Repair of LP Steam Turbine BladesAuthors:
James Harris, Swinburne University of Technology; Melbourne Australia
S. Sun, IRIS, Swinburne Univ. of Technology; Melbourne Australia
B. Dempster, IRIS, Swinburne Univ. of Technology; Melbourne Australia
Milan Brandt, IRIS, Swinburne Univ. of Technology; Melbourne Australia
Presented at PICALO 2006
We have investigated the potential of laser cladding to deposit a high quality and erosion resistant protection shield on the leading edge of LP turbine blades. Laser cladding offers unique advantages over the conventional techniques. The project to-date has demonstrated the feasibility of in-situ repa...
$28.00 (USD)
PICALO 2006 Paper #303 (Continuous Wave Nd:YAG Laser Cladding of Stellite 6 Muti-Track Layers on Mild and AISI 4016 Steel)
PIC06_303
Continuous Wave Nd:YAG Laser Cladding of Stellite 6 Muti-Track Layers on Mild and AISI 4016 SteelAuthors:
M. Franklin, University of Wollongong; Wollongong Australia
Shao Huang, University of Wollongong; Wollongong Australia
M. Brandt, Industrial Research Institute Swinburne, Swinburne University of Technology; Melbourne Australia
A.K. Tieu, University of Wollongong; Wollongong Australia
T. Chandra, University of Wollongong; Wollongong Australia
Presented at PICALO 2006
The level of sliding friction between the mating top centre and centre bowl liner components of a rail freight truck centre bearing provides both positive and negative effects...
$28.00 (USD)
PICALO 2006 Paper #304 (Effect of Increment and Single-Track Geometry on the Formation of Multi-track Laser Cladding)
PIC06_304
Effect of Increment and Single-Track Geometry on the Formation of Multi-track Laser CladdingAuthors:
Jim Harris , Industrial Research Institute Swinburne, Swinburne University of Technology ; Melbourne Australia
Milan Brandt, Industrial Research Institute Swinburne, Swinburne University of Technology; Melbourne Australia
Shoujin Sun, Industrial Research Institute Swinburne, Swinburne University of Technology; Melbourne Australia
Yvonne Durandet, Industrial Research Institute Swinburne, Swinburne University of Technology ; Melbourne Australia
Presented at PICALO 2006
The variation of track geometry during multi-track laser cladding of stellite 6 on mild st...
$28.00 (USD)
PICALO 2006 Paper #305 (Residual Stresses in Al7075 Alloy Plate Laser Clad with AL-12SI Alloy Powder)
PIC06_305
Residual Stresses in Al7075 Alloy Plate Laser Clad with AL-12SI Alloy PowderAuthors:
Yvonne Durandet, Industrial Research Institute of Swinburne University of Technology (IRIS); Hawthorn Australia
R. Deam, Industrial Research Institute Swinburne; Hawthorn Australia
Maurice Ripley, Australian Nuclear Science and Technology Organisation (ANSTO); Lucas Heights Australia
Philip Bendeich, Australian Nuclear Science and Technology Organisation (ANSTO); Lucas Heights Australia
Milan Brandt, Industrial Research Institute of Swinburne University of Technology (IRIS); Hawthorn Australia
Qianchu Liu, Defence Science and Technology Organisation (DSTO); Fisher...
$28.00 (USD)
PICALO 2006 Paper #306 (Study of Melting Characteristics of Wire in Laser Cladding Process)
PIC06_306
Study of Melting Characteristics of Wire in Laser Cladding ProcessAuthors:
Nazmul Alam, CSIRO; Adelaide Australia
Presented at PICALO 2006
Laser cladding is becoming an attractive process for the repair and hardfacing of high-value components. The consumables used for these cladding processes are usually in the form of metallic powders due to the ease of operation. However, the use of metal powder is mostly limited to downhand position cladding process. Wire can also be used in laser cladding process and can be fed directly into the laser beam out-of-positions. However, in such cases dilution with the work piece can be difficult to control. This work has investigated aspects of the wire c...
$28.00 (USD)
PICALO 2006 Paper #307 (Microstructural Features and Cracking of Laser Cladding on 7XXX Aluminium Alloys with Al-12%Si Powder)
PIC06_307
Microstructural Features and Cracking of Laser Cladding on 7XXX Aluminium Alloys with Al-12%Si PowderAuthors:
Qianchu Liu, DSTO; Melbourne Australia
Presented at PICALO 2006
There has been increasing interest to apply laser cladding technology on aluminium alloys for repairing damaged surfaces of aircraft components by fatigue or corrosion. However, the mechanical or corrosion properties strongly depend on the microstructures. This paper presents the study of the microstructural features in both the clad layer and the Heat-affected zones (HAZs). The aluminium-12%silicon (Al-12%Si) powder was used for cladding of 7075 Al alloy. The main features in the clad layer are fine -aluminium dendriti...
$28.00 (USD)
PICALO 2006 Paper #401 (Basic Understanding on Beam - Plasma Interaction in Laser Welding)
PIC06_401
Basic Understanding on Beam - Plasma Interaction in Laser WeldingAuthors:
Akira Matsunawa, Osaka Univ.; Hyogo Japan
Jong-Do Kim, Korean Maritime University; Korea
Presented at PICALO 2006
In early development days of laser welding, most of engineers and scientists believed that the laser induced plasma was the high temperature and pressure plasma which could reflect the incident beam by plasma due to the plasma electron frequency. However, the necessary electron number density to cut-off the incident beam are 1019 1/cm3 for YAG laser (1.06 μm) and 1021 1/cm3 for CO2 laser (10.6 μm). These electron number densities are unable to achieve in the one atmospheric pressure thermal...
$28.00 (USD)
PICALO 2006 Paper #402 (Convection of Energy in Partially Ionised Vapour in Laser Keyhole Welding)
PIC06_402
Convection of Energy in Partially Ionised Vapour in Laser Keyhole WeldingAuthors:
John Dowden, University of Essex; Colchester Essex Great Britain
Presented at PICALO 2006
Laser power is absorbed in laser keyhole welding by several mechanisms. In CW CO2 welding absorption into the partially ionised vapour in the keyhole by the processes of inverse bremsstrahlung and thermal conduction can be important. The energy is then transferred to the work piece by thermal conduction through the vapour. This process has recently been partially modelled mathematically. Experimental observations give a wide range of values for the possible vapour temperatures and as a result, widely varying estimates for th...
$28.00 (USD)
Page: 1, 2, 3
