ICALEO 2010 Paper #105 (Characteristics of Disk Laser-Induced Plasma)

Characteristics of Disk Laser-Induced Plasma
Authors:
Seung Lee, University of Michigan; Ann Arbor MI USA
Jyoti Mazumder, University of Michigan; Ann Arbor MI USA
Presented at ICALEO 2010

Disk laser is being used as a noble source in laser material processing area due to the high quality of the beam. In laser material interaction field, laser induced plasma has been an interesting part because this inevitable phenomenon in the area is closely related with energy transfer. This plasma plume can diverge or converge the focusing laser beam. Absorption in the plasma block the energy transfer from the laser beam to the target material. On the other hand converging beam enhance the energ...

ICALEO 2010 Paper #103 (Latest Research Results with High Power Solid State Laser Optics with Minimized Focus Shift)

Latest Research Results with High Power Solid State Laser Optics with Minimized Focus Shift
Authors:
David Havrilla, TRUMPF Inc.; Plymouth MI USA
Marco Holzer, TRUMPF Laser- und Systemtechnik GmbH; Ditzingen Germany
Peter Olschowsky, TRUMPF Laser- und Systemtechnik GmbH; Ditzingen Germany
Presented at ICALEO 2010

The dramatic advances in research and development of high brightness laser sources pose more and more a challenge to focusing optics. Thermal focus shift can influence the application results and has to be minimized. This talk shows the latest results regarding new optics and materials suited for high brightness laser sources.

ICALEO 2010 Paper #102 (Comparison Of 1 Micron Transmissive Optical Materials For High Power Lasers)

Comparison Of 1 Micron Transmissive Optical Materials For High Power Lasers
Authors:
Stephen Rummel, II-VI Incorporated; Saxonburg PA USA
Gary Herrit, II-VI Incorporated; Saxonburg PA USA
Alan Hedges, II-Vi Incorporated; Saxonburg PA USA
Presented at ICALEO 2010

With the advent of very high power fiber and disk lasers, choosing the right optical material for the application is vitally important. The best optic for an application is determined by a combination of factors about the application itself and the optic material properties. Important application factors include the laser power, laser type, and the users application. Material properties that the designer ...

ICALEO 2010 Paper #101 (Online Focus Shift Measurement in High Power Fiber Laser Welding)

Online Focus Shift Measurement in High Power Fiber Laser Welding
Authors:
Daniel Reitemeyer, BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH; Bremen Germany
Thomas Seefeld, BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH; Bremen Germany
Frank Vollertsen, BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH; Bremen Germany
Presented at ICALEO 2010

The occurrence of focus shift in high power fiber laser welding has been reported. The small percentage of laser light absorbed in the optical elements of the welding head leads to a thermal focus shift. Contaminations on the optical surfaces are enhancing the absorption and thus the focus shift. So, o...

ICALEO 2010 Paper #1006 (Distortion and Residual Stresses in Laser Beam Welded Shaft-Hub Joints)

Distortion and Residual Stresses in Laser Beam Welded Shaft-Hub Joints
Authors:
Frank Buschenhenke, BIAS - Bremer Institut für angewandte Strahltechnik; Bremen Germany
Michael Hofmann, FRM II - Forschungsneutronenquelle Heinz Maier-Leibnitz; Garching Germany
Thomas Seefeld, BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH; Bremen Germany
Frank Vollertsen, BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH; Garching Germany
Presented at ICALEO 2010

In laser beam welding processes, a serious challenge is to control the distortion during the process. The understanding of the whole process chain in view of different distortion potentials intro...

ICALEO 2010 Paper #1005 (Welding Zinc Coated Steels: New Joint Design and Strategy with Scanner Technology)

Welding Zinc Coated Steels: New Joint Design and Strategy with Scanner Technology
Authors:
Klaus Loeffler, TRUMPF Laser & Systems GmbH; Ditzingen Germany
Tim Hesse, TRUMP Werkzeugmaschinen GmbH; Ditzingen Germany
Peter Kaupp, TRUMPF Laser- und Systemtechnik GmbH; Ditzingen Germany
Presented at ICALEO 2010

The existing problems of weld defects in welidng zinc coated steels in a overlap situation are present in the automotive industry. The root cause is the different melting temperature of zinc and steel. Zinc vapourises already at 900C versus steel melts at 1500C. The result if not taking care of the outgasing are pinholes and crates in the weld seam. Extensive researc...

ICALEO 2010 Paper #1004 (Remote Laser Welding of Zinc-Coated Sheet Metal Component in a Lap Configuration Utilizing Humping Effect )

Remote Laser Welding of Zinc-Coated Sheet Metal Component in a Lap Configuration Utilizing Humping Effect
Authors:
Hongping Gu, Stonach Centre for Innovation, Magna International Inc; Aurora ON Canada
Boris Shulkin, Stonach Centre for Innovation, Magna International Inc; Aurora, Ontario Canada
Presented at ICALEO 2010

With the advancement of high power fiber delivery lasers, remote laser welding becomes a reality and more and more systems have been introduced into production lines. Remote laser welding takes the advantages of less mechanical movement and better accessibility of the beam to the workpiece, thus fast processing speed can be achieved. In most cases, remote laser weldi...

ICALEO 2010 Paper #1002 (Laser Welding Applied to Advanced High Strength Steels for Automotive Applications)

Laser Welding Applied to Advanced High Strength Steels for Automotive Applications
Authors:
Rosa Arias, Aimen Technology Centre; O Porrino Spain
Alvaro Prada, Aimen Technology Centre; O PorriO
Eva Vaamonde C, Aimen Technology Centre; O PorriO Spain
Ambroise VandewynckLe, Aimen Technology Centre; O PorriO
David Gutierrez, Ctm Technology Centre; Manresa Spain
Antoni Lara, Ctm Technology Centre; Manresa Spain
Michel GarcA, Gestamp R & D - Autotech Engineering; Sant Esteve Sesrovires ( Barcelona) Spain
Presented at ICALEO 2010

The use of Advanced High Strength Steels (AHSS) in the car industry is permitting to...

ICALEO 2009 Paper #P4 (Laser-assisted Deposition of Good Carbon - From Diamond Films to Nanotubes (Plenary, 30 minutes))

Laser-assisted Deposition of Good Carbon — From Diamond Films to Nanotubes (Plenary, 30 minutes)
Authors:
Y.S. Zhou, -; -
H. Ling, -; -
Z.Q. Xie, -; -
W. Xiong, -; -
M. Mahjouri-Samani, -; -
Y. Gao, -; -
M. Mitchell, -; -
Yongfeng Lu, University of Nebraska - Lincoln; Lincoln NE USA
Presented at ICALEO 2009

Carbon materials of versatile structures, from diamond, graphite, carbon nanotube to graphene, exhibit distinct properties and find applications in different fields. Laser-assisted deposition methods were developed for growing materials with unparallel advantages, such as selective interaction...

ICALEO 2009 Paper #P165 (The Tribological Applications of WC-Co Electro-Spark Coatings Modified Via Laser Treatment)

The Tribological Applications of WC-Co Electro-Spark Coatings Modified Via Laser Treatment
Authors:
Norbert Radek, Technical University of Kielce; Kielce Poland
Konrad Bartkowiak, Fraunhofer IWS; Dresden Germany
Matthias Luetke, Presenter not author - Technische Universitat Dresden; Dresden Germany
Presented at ICALEO 2009

Electro spark alloying (ESA) technique is a well established method. However, new lasers are becoming available on the market that can make this technique more attractive for various industry applications, e.g.: surface texturing technology has significant advantages for the wear decreasing into sliding friction. The work reported here concentrates o...