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Deterioration of electrical properties of printed circuit boards, as soldering temperatures are above the glass transition temperature of the board material and flux components (e.g. glycols, or chloride and bromide ions) can diffuse into its matrix; e.g. water-soluble fluxes containing polyethylene glycol were demonstrated to have such impact [10]
The use of larger gauge stranded aluminum wire (larger than #8 AWG) is fairly common in much of North America for modern residential construction. Aluminum wire is used in residential applications for lower voltage service feeders from the utility to the building. This is installed with materials and methods as specified by the local electrical ...
Fusion welding is a generic term for welding processes that rely on melting to join materials of similar compositions and melting points. [1] Due to the high-temperature phase transitions inherent to these processes, a heat-affected zone is created in the material [ 1 ] : 755 (although some techniques, like beam welding , often minimize this ...
Poor fusion also affects the strength of the weld and is often easily visible. This is caused by low current, contaminated joint surfaces, or the use of an improper electrode. [citation needed] Shallow welds are weaker and can be mitigated by decreasing welding speed, increasing the current, or using a smaller electrode.
A conductive object will experience a repulsion force. This can lift objects against gravity, though with continual power input to replace the energy dissipated by the eddy currents. An example application is separation of aluminum cans from other metals in an eddy current separator. Ferrous metals cling to the magnet, and aluminum (and other ...
A pinched aluminium can, produced from a pulsed magnetic field created by rapidly discharging 2 kilojoules from a high-voltage capacitor bank into a 3-turn coil of heavy gauge wire. Electromagnetic forming ( EM forming or magneforming ) is a type of high-velocity, cold forming process for electrically conductive metals, most commonly copper and ...
The aluminum tube is detonated at the end extending out and beyond the copper-wire helix. On the other end a transformer enables the generator to work more efficiently into the electrical load. An explosively pumped flux compression generator ( EPFCG ) is a device used to generate a high-power electromagnetic pulse by compressing magnetic flux ...
Along with the wire electrode, a shielding gas feeds through the welding gun, which shields the process from atmospheric contamination. The process can be semi-automatic or automatic. A constant voltage, direct current power source is most commonly used with GMAW, but constant current systems, as well as alternating current, can be used. There ...