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NUCLEAR APPLICATIONS OF ELECTRON BEAM WELDING
Electron beam has been applied to the fabrication of fuel elements for pressurised water reactors and the distinct advantages are:Vacuum environment prevents contamination of the weld joint and ensures that the weld metal possesses good corrosion resistance & mechanical properties. High concentration of weld heat, the concentration of thermal energy is an important advantage of EBW of plate t ype fuel element s. High concentration of heat reduces shrinkage and thermal distortion for example, in fuel elements welding, total transverse shrinkage weld seam is only 0:02 mm to 0:04 mm for electron beam welds. Complex welded structures of molybdenum are being EB welded.
SUBMERGED ARC WELDING-Set Up Submerged arc welding system consists of the following basic modules: 1. Welding head 2. Power source 3. Flux feeding and recovery units Schematic
TYPE OF DEFECTS AND THEIR SIGNIFICANCE Defects in weldments in general can be classified as follows: I. Defects involving inadequate bonding Lack of fusion Incom
LASER SURFACE TREATMENT APPLICATIONS The laser can be used to alter the surface structure of materials either with or without alloying additions as compared to alloying by
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An oil engine works on the Dual cycle, the heat liberated at consent pressure being twice that liberated at consent volume. The compression ratio of the engine is 8 and the expansi
Reaction Bonding Such bonding is attained by arranging for two or more components of a compacted body to respond to form both a desired phase and a bond among particles. The r
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Maximum permissible stress in belt: Q: A belt 100mm wide and 8.0mm thick are transmitting power at belt speed of 160m/minute. The angle of lap for smaller pulley is 165º an
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