ICALEO 2006 Paper #1205 (Qualification of Nd:YAG Laser Direct Metal Deposition Techniques for Repair of Nickel Superalloy Components)
Qualification of Nd:YAG Laser Direct Metal Deposition Techniques for Repair of Nickel Superalloy Components
Authors:
A A Lugan, TWI Ltd; Cambridge Great Britain
C Rinaldi, CESI RICERCA SpA; Milano Italy
G B Melton, TWI Ltd; Cambridge Great Britain
Paul Hilton, TWI Ltd.; Great Abington, Cambridge Great Britain
Presented at ICALEO 2006
The high temperature operating components of power utility gas turbines are often made with gamma prime reinforced nickel based superalloys. As a result, there is a very high cost ascociated with the replacement of any parts damaged during service. The economic benefits to be gained by using repair procedures as opposed to rep...$28.00
ICALEO 2006 Paper #1204 (Absorption Coefficient Characterization in Ti-6Al-4V Laser Additive Manufacturing)
Absorption Coefficient Characterization in Ti-6Al-4V Laser Additive Manufacturing
Authors:
Anil Chaudhary, Applied Optimization, Inc.; Dayton OH USA
Matt Keller, Applied Optimization, Inc.; Dayton OH USA
Shawn Kelly, Laser Processing Division, ARL; State College, PA PA USA
Steven Medeiros, Wright Patterson AFB; Dayton OH USA
Presented at ICALEO 2006
In order to accurately model the laser deposition of Ti-6Al-4V aerospace components, the interaction of the laser and metal powder feedstock has been investigated. One of the key modeling parameters, the absorption coefficient of the material, is often unknown for material in powder form. It has been shown tha...$28.00
ICALEO 2006 Paper #1203 (Direct Manufacturing of Aeronautical Components by Laser Metal Deposition of TI-6AI-4V)
Direct Manufacturing of Aeronautical Components by Laser Metal Deposition of TI-6AI-4V
Authors:
Julie Maisonneuve, Centre des Materiaux - Ecole des Mines de Paris; EVRY France
Bienvenu Yves, Centre des Materiaux; Evry France
Christophe Colin, Centre des Materiaux; Evry France
Aubry Pascal, GIP-Gerailp; Arcueil France
Presented at ICALEO 2006
Profil project concerns direct manufacturing by two additive processes which are laser metal deposition and selective laser sintering. The involved partners are the GIFAS group (DASSAULT AVIATION, MBDA, EUROCOPTER, SNECMA, EADS), School of Mines (Centre des Materiaux) and GIP-Gerailp. During the first year of the proje...$28.00
ICALEO 2006 Paper #1202 (Mechanical Performance of Laser Deposition Repairing of IN 738 on Directionally Solidified Superalloy Blade)
Mechanical Performance of Laser Deposition Repairing of IN 738 on Directionally Solidified Superalloy Blade
Authors:
Minlin Zhong, Tsinghua University; Beijing Peoples Republic of China
Xiaofeng Zhu, Tsinghua University; Beijing Peoples Republic of China
Wenjin Liu, Tsinghua University; Beijing Peoples Republic of China
Presented at ICALEO 2006
Development of cost-effective repair and rejuvenation processes for DS supperalloy blades are of great economic and technological meanings due to the high cost of the blades. Laser deposition has been proved to be a promising method to repair supperalloy components especially directionally solidified Ni-based superalloy blades, ...$28.00
ICALEO 2006 Paper #1104 (Optimization of Parameters for Effective Welding of Aerospace Components)
Optimization of Parameters for Effective Welding of Aerospace Components
Authors:
Devdas Shetty, University of Hartford; West Hartford CT USA
Adil Widaatalla, University of Hartford; West Hartford CT USA
Tom Eppes, University of Hartford; West Hartford CT USA
Presented at ICALEO 2006
Inconel 625 is nickel-based supper alloy used in different jet engines for its high corrosion resistance. Laser welding of combustor part of jet engine to replace the existing procedure is a major area of research and development. The specification of this manufacturing process requires the weld to be hermetic sealed. The use of fiber laser and the study of the effect of laser welding par...$28.00
ICALEO 2006 Paper #1101 (Fiber Laser Welding of 780MPa High Strength Steel)
Fiber Laser Welding of 780MPa High Strength Steel
Authors:
Zhongjie Liu, Nagoya University; Nagoya Japan
Muneharu Kutsuna, Nagoya University; Nagoya Japan
Guojian Xu, Nagoya University; Nagoya Japan
Presented at ICALEO 2006
A 2kW Ytterbium fiber laser, YLR-2000, was used for welding of 780MPa grade high strength steel-WEL-TEN780RE. The WEL-TEN780RE steel is a kind of heat rolled, fine microstructure low carbon high strength steel used for welded constructions. The effects of defocusing distance, welding speed, shielding gas and its flow rate on cross section bead shape and penetration were studied in continue wave laser beam welding. The effects of frequency and duty c...$28.00
ICALEO 2006 Paper #107 (Laser Joining of Steel-Aluminum Joints in T Configuration)
Laser Joining of Steel-Aluminum Joints in T Configuration
Authors:
Jeroen van Tienhoven, University of Twente; Enschede Netherlands
B. Pathiraj, University of Twente; Enschede Netherlands
J. Meijer, University of Twente; Enschede Netherlands
Presented at ICALEO 2006
A laser joining process employing a Nd:YAG laser source, a cold wire feeder and a six axes robot has been developed to produce steel to aluminum transition joints. To obtain good strength, it is critical to minimize the formation of intermetallic phases at the joint. This has been achieved by a careful manipulation of the laser power and the laser beam position. This enabled the steel to be kept in a solid ...$28.00
ICALEO 2006 Paper #106 (Which Laser Process for Steel to Aluminium Joining?)
Which Laser Process for Steel to Aluminium Joining?
Authors:
Guillaume Sierra, CEA/DRT/GERAILP and LMGC; Montpellier France
Patrice Peyre, GERAILP/LALP; Arcueil France
David Stuart, GERAILP/LALP; Arcueil France
Frédéric Deschaux-Beaume, LMGC UMR 5508 CNRS; Montpellier France
Gilles Fras, LMGC UMR 5508 CNRS; Montpellier France
Presented at ICALEO 2006
The joining of galvanized -or not- low carbon steel to 6000 aluminium alloys was investigated by Nd:YAG laser process with three different assembling modes : 1) a key-hole mode welding which generates liquid aluminium to liquid steel interaction, 2) a solid steel to liquid aluminium interaction ...$28.00
ICALEO 2006 Paper #105 (Avoiding Hot Cracking by Induction Based Change of Thermal Strains during Laser Welding)
Avoiding Hot Cracking by Induction Based Change of Thermal Strains during Laser Welding
Authors:
Berndt Brenner, Fraunhofer IWS Dresden; Dresden Germany
Gunther Goebel, Fraunhofer IWS Dresden; Dresden Germany
Presented at ICALEO 2006
Hot cracking in welding is still an unresolved problem for a wide range of materials. Restricting the chemical composition usually helps to reduce this problem, e.g. limiting the sulphur content on steels to very low levels. But for industrial applications such additional restrictions on the material norm are hardly applicable. Furthermore some steels grades like free cutting steels contain additional sulphur which counteracts this approach. Therefore ...$28.00
ICALEO 2006 Paper #104 (Effect of Alloying Elements on Porosity Formation in Laser Welding of Heavy Section Steel Plates)
Effect of Alloying Elements on Porosity Formation in Laser Welding of Heavy Section Steel Plates
Authors:
Susumu Tsukamoto, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Goro Arakane, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Kazuhiro Kojima, Nippon Steel; Futtsu, Chiba Japan
Tadayuki Otani, Nippon Steel; Futtsu, Chiba Japan
Shigeru Ohkita, Nippon Steel; Futtsu, Chiba Japan
Presented at ICALEO 2006
Effect of some alloying elements on the porosity formation has been investigated in full penetration laser welding of 12 mm thickness C-Si-Mn steels using a 20 kW CO2 laser. Formation process of the porosit...$28.00
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