ICALEO 2007 Paper #901 (Fabrication of Fe-based Bulk Metallic Glass Components using Laser Additive Manufacturing)
Fabrication of Fe-based Bulk Metallic Glass Components using Laser Additive Manufacturing
Authors:
Ryan W. Mcvey, Arl, Penn State; State College PA USA
Shawn Kelly, ARL, The Penn State University; State College PA USA
Presented at ICALEO 2007
One of the current limitations in producing bulk metallic glass components of sufficient scale for structural application is the low critical casting thickness available with current amorphous alloy systems. With laser additive manufacturing, material and heat are added incrementally, theoretically leading to the fabrication of much larger amorphous structures than currently achievable with casting alone. Recent experimental results indicate m...$28.00
ICALEO 2007 Paper #806 (The Effect of Laser and Welding Parameters on Keyhole and Melt Pool Behavior during Fiber Laser Welding)
The Effect of Laser and Welding Parameters on Keyhole and Melt Pool Behavior during Fiber Laser Welding
Authors:
Antti Salminen, Lappeenranta University of Technology; Lappeenranta Finland
Anna Fellman, Lappeenranta University of Technology; Lappeenranta Finland
Presented at ICALEO 2007
The keyhole laser welding is the most important laser welding process for metal industry. This process utilizes the high energy density of laser beam to vaporize and melt material thus producing a keyhole to material via which the energy is brought to the material. There are various mathematical models created to explain the shape and behavior of keyhole and melt pool during welding. However, the va...$28.00
ICALEO 2007 Paper #805 (Local Strength and Rigidity Increase of Sheet Metal using Bead-On-Plate Laser Welds)
Local Strength and Rigidity Increase of Sheet Metal using Bead-On-Plate Laser Welds
Authors:
Mitja Schimek, Laser Zentrum Hannover E.V.; Hannover Germany
Andreas Ostendorf, Laser Zentrum Hannover E.V.; Hannover Germany
Oliver Meier, Laser Zentrum Hannover E.V.; Hannover Germany
Heinz Haferkamp, Laser Zentrum Hannover E.V.; Hannover Germany
Presented at ICALEO 2007
Local physical and geometrical effects which have only been observed so far as side effects in laser welding processes are to be used purposefully, in order to achieve locally adapted mechanical properties and to improve load-transferring components significantly. One aim of this project is the i...$28.00
ICALEO 2007 Paper #804 (Evaluation of Weld Porosity in Laser Beam Seam Welds: Optimizing Continuous Wave and Square Wave Modulated Processes)
Evaluation of Weld Porosity in Laser Beam Seam Welds: Optimizing Continuous Wave and Square Wave Modulated Processes
Authors:
Jerome Norris, Sandia National Laboratories; Albuquerque NM USA
Matthew Perricone, Sandia National Laboratories; Albuquerque NM USA
R. Allen Roach, Sandia National Laboratories; Albuquerque NM USA
Kevin Faraone, Honeywell FM&T; Kansas City MO USA
Chad Ellison, Honeywell FM&T; Kansas City MO USA
Presented at ICALEO 2007
Nd:YAG laser joining is a high energy density (HED) process that can produce high-speed, low-heat input welds with a high depth-to-width aspect ratio. This is optimized by formation of a keyhole i...$28.00
ICALEO 2007 Paper #803 (CW Nd:YAG Laser Welding of Dissimilar Sheet Metals)
CW Nd:YAG Laser Welding of Dissimilar Sheet Metals
Authors:
C van Rooyen, CSIR South Africa; Pretoria Republic of South Africa
Maritha Theron, CSIR South Africa; Pretoria Republic of South Africa
LH Ivanchev, CSIR South Africa; Pretoria Republic of South Africa
Presented at ICALEO 2007
A 4kW CW Nd:YAG laser was used for lap welding of three different dissimilar metal combinations, namely 316L S/S - Ti64, 316L S/S - Al 5052 and Al 1200 Cu (99.85%). A welding matrix of power, travel speed and spot sizes was investigated. The welded samples were studied and evaluated by means of X-rays, stereo and optical microscopy, SEM analyses, micro-hardness testing as well as sub...$28.00
ICALEO 2007 Paper #802 (Analysis of the Various Melt Pool Hydrodynamic Regimes Observed during CW Nd-YAG Deep Penetration Laser Welding)
Analysis of the Various Melt Pool Hydrodynamic Regimes Observed during CW Nd-YAG Deep Penetration Laser Welding
Authors:
Remy Fabbro, LALP (CNRS)/GIP GERAILP; Arcueil Cedex France
Sonia Slimani, Air Liquide; St OUEN L'AUMONE France
Frederic Coste, LALP(CNRS)/GERAILP; Arcueil France
Francis Briand, Air Liquide; St OUEN L'Aumone France
Presented at ICALEO 2007
We present a complete experimental study of the analysis of the hydrodynamics evolution of the melt pool during laser Yag welding of stainless steel. The main diagnostic that has been used in this study is a high-speed video camera (10 to 30 kHz) that allowed us to analyze the main different parts that...$28.00
ICALEO 2007 Paper #706 (Relevant Experiments)
Relevant Experiments
Authors:
Edward Metzbower, Eamweld Llc; Washington DC USA
Presented at ICALEO 2007
Akira Matsunawa and his co-workers at the Joining and Welding Research Institute at Osaka University devised, created and exploited a series of clever, telling and relevant experiments that has provided us with information on the temperature and the formation of the keyhole in laser beam welding as well as important knowledge as to the flow of the molten pool and the formation of porosity in welds with partial penetration. They have developed a high-speed X-ray transmission observation system to reveal the keyhole, bubble and porosity formation behavior. They utilize two synchronized ultra ...$28.00
ICALEO 2007 Paper #705 (The Contribution of Prof. Akira Matsunawa to the Understanding of Laser Welding Process)
The Contribution of Prof. Akira Matsunawa to the Understanding of Laser Welding Process
Authors:
Remy Fabbro, LALP (CNRS)/GIP GERAILP; Arcueil Cedex France
Presented at ICALEO 2007
Among his various contributions in the domain of laser processing of materials, the laser community agrees to recognize that Prof. A Matsunawa has been a leading contributor to the understanding of the laser welding process since more than 25 years. It is interesting to note that his contribution to this field was realized in conjunction with the constant development of the ICALEO Conference during the same period, where he made his main presentations of scientific results during a continuous and regular participatio...$28.00
ICALEO 2007 Paper #704 (Words of Memory to Our Colleague Prof. Akira Matsunawa)
Words of Memory to Our Colleague Prof. Akira Matsunawa
Authors:
Volodymyr Kovalenko, National Technical University of Ukraine; Kyiv Ukraine
Presented at ICALEO 2007
I started my research at Welding Research Institute (WRI) of Osaka University, Japan in 1977 where I was working with Prof. Yoshiaki Arata (then the director of WRI) until 1978. Just that year Prof. Akira Matsunawa from Welding Department of the same university has joined the WRI. Thus I got aquainted with Akira from that time. Later we had few chances to meet and to get more familiar with each other. We were working on different projects. He had been deeply involved in studying welding process with CO2 laser and especially in under...$28.00
ICALEO 2007 Paper #701 (Collaboration of Physical and Metallurgical Viewpoints for Understanding and Process Development of Laser Welding)
Collaboration of Physical and Metallurgical Viewpoints for Understanding and Process Development of Laser Welding
Authors:
Seiji Katayama, Osaka University; Ibaraki, Osaka Japan
Presented at ICALEO 2007
I have belonged to Prof. Matsunawas laboratory in JWRI since 1981 until his retirement from Osaka University. Prof. A. Matsunawa and I approached our experiments and researches from physical and metallurgical viewpoints in our expert fields to understand the penetration and phenomena in laser welding. The presentation will introduce our fruitful results of plume and keyhole behavior, melt flows and bubbles and pores formation in the molten pool during laser and hybrid welding. He was mos...$28.00
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