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Aluminium alloys are often used due to their high strength-to-weight ratio, corrosion resistance, low cost, high thermal and electrical conductivity.There are a variety of techniques to join aluminium including mechanical fasteners, welding, adhesive bonding, brazing, soldering and friction stir welding (FSW), etc. Various techniques are used based on the cost and strength required for the joint.
Metal tankards often come with a glass bottom. The legend is that the glass-bottomed tankard was developed as a way of refusing the King's shilling, i.e., conscription into the British Army or Navy. The drinker could see the coin in the bottom of the glass and refuse the drink, thereby avoiding conscription.
In such cases, a weld backing tape can be used. This is a layer of glass fibre band in the centre of a width of adhesive aluminium foil that is placed over the rear of the weld joint. Welds made onto weld backing tape can be carried out faster than normal and the weld bead is cast flat onto the glass fibre leaving an acceptable weld profile behind.
An inexpensive alloy that is easily cast and worked, spelter was used from the 1860s in the manufacture of candlesticks, clock cases, tableware, and light fixtures. In the early 20th century, sculptors such as Jacques Limousin used spelter heavily in their manufacture of Art Nouveau and Art Deco figurines and other ornaments.
Many metals and thermoplastics can be welded, but some are easier to weld than others (see Rheological weldability). A material's weldability is used to determine the welding process and to compare the final weld quality to other materials. Weldability is often hard to define quantitatively, so most standards define it qualitatively.
Exothermic welding, also known as exothermic bonding, thermite welding (TW), [1] and thermit welding, [1] is a welding process that employs molten metal to permanently join the conductors. The process employs an exothermic reaction of a thermite composition to heat the metal, and requires no external source of heat or current.
Uranium glass used as lead-in seals in a vacuum capacitor. Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass-encapsulated semiconductor diodes, reed switches, glass windows in metal cases, and metal or ceramic packages of ...
The electrical energy for the percussion welding can be supplied by a transformer, as alternating current (or rectified), or by the discharge of capacitors.Because of the short duration of the arc and of the fact that all of the weld energy comes from this arc, the electrical resistance of the parts to be welded does not affect the amount of heat generated at the weld and substances of ...