Experimental Investigations on Pulsed Nd:YAG Laser Welding of C17300 Copper-Beryllium and 49Ni-Fe Soft Magnetic Alloys
- School of Metallurgy and Materials Engineering, School of Engineering University of Tehran, Tehran (Iran, Islamic Republic of)
Copper-beryllium and soft magnetic alloys must be joined in electrical and electro-mechanical applications. There is a high difference in melting temperatures of these alloys which cause to make the joining process very difficult. In addition, copper-beryllium alloys are of age hardenable alloys and precipitations can brittle the weld. 49Ni-Fe alloy is very hot crack sensitive. Moreover, these alloys have different heat transfer coefficients and reflection of laser beam in laser welding process. Therefore, the control of welding parameters on the formation of adequate weld puddle composition is very difficult. Laser welding is an advanced technique for joining of dissimilar materials since it can precisely control and adjust the welding parameters. In this study, a 100W Nd:YAG pulsed laser machine was used for joining 49Ni-Fe soft magnetic to C17300 copper-beryllium alloys. Welding of samples was carried out autogenously by changing the pulse duration, diameter of beam, welding speed, voltage and frequency. The spacing between samples was set to almost zero. The ample were butt welded. It was required to apply high voltage in this study due to high reflection coefficient of copper alloys. Metallography, SEM analysis, XRD and microhardness measurement was used for survey of results. The results show that the weld strength depends upon the chemical composition of the joints. To change the wells composition and heat input of the welds, it was attempted to deviate the laser focus away from the weld centerline. The best strength was achieved by deviation of the laser beam away about 0.1mm from the weld centerline. The result shows no intermetallic compounds if the laser beam is deviated away from the joint.
- OSTI ID:
- 21510197
- Journal Information:
- AIP Conference Proceedings, Vol. 1315, Issue 1; Conference: AMPT2010: International conference on advances in materials and processing technologies, Paris (France), 24-27 Oct 2010; Other Information: DOI: 10.1063/1.3552557; (c) 2010 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BEAMS
BERYLLIUM ALLOYS
COPPER ALLOYS
HEAT TRANSFER
INTERMETALLIC COMPOUNDS
LASER WELDING
MELTING POINTS
METALLOGRAPHY
MICROHARDNESS
NEODYMIUM LASERS
NICKEL
PRECIPITATION
REFLECTION
SCANNING ELECTRON MICROSCOPY
VELOCITY
WELDED JOINTS
X-RAY DIFFRACTION
ALLOYS
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
ENERGY TRANSFER
FABRICATION
HARDNESS
JOINING
JOINTS
LASERS
MECHANICAL PROPERTIES
METALS
MICROSCOPY
PHYSICAL PROPERTIES
SCATTERING
SEPARATION PROCESSES
SOLID STATE LASERS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
WELDING