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Metal Crafts Section
Work hardening
Work hardening, or strain hardening, is an increase in mechanical strength due to plastic deformation. In metallic solids, permanent change of shape is usually carried out on a microscopic scale by defects called dislocations which are created by stress and rearrange the material by moving through it. At low temperature, these defects do not […]
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Whitesmith
A whitesmith is a person who works with white or light-colored metal (such as tin) and does finishing work, such as filing and/or polishing, on iron to remove black oxides.
Whitesmith can also refer to the person who polishes or finishes the metal rather than forging it.
Whitesmith also refers to those who work with ‘black […]
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Whisker (metallurgy)
Metal whiskers is a crystalline metallurgical phenomenon whereby metal grows tiny, filiform hairs. The effect is primarily seen on elemental metals but also occurs with alloys.
The mechanism behind metal whisker growth is not well understood, but seems to be encouraged by compressive mechanical stresses including:
* residual stresses caused by electroplating;
[…]
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Wheeling (metalworking)
Wheeling is a metalworking process.
Wheeling is done by repeatedly drawing the a sheet of metal between shaped rollers or wheels called a Wheeling machine / English Wheel. In skilled hands, very complex shapes, such as automotive body panels, can be formed by hand. The use of the wheel allows the metal to be shaped […]
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Well drilling
Well drilling is the process of drilling a hole in the ground for the extraction of a natural resource such as ground water, natural gas, or petroleum. Drilling for the exploration of the nature of the material underground (for instance in search of metallic ore) is best described as borehole drilling, or ‘drilling’.
The earliest […]
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Welding power supply
A welding power supply is a device that provides an electrical current to perform welding. Welding usually requires high current (over 80 amps) and it can need above 12,000 amps in spot welding. Low current can also be used; welding two razor blades together at 5 amps with gas tungsten arc welding is a […]
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Welding
Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material (the weld puddle) that cools to become a strong joint, but sometimes pressure is used in conjunction with heat, […]
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Welder certification
Welder certification, (also known as welder qualification) are specially designed tests to determine a welder’s skill and ability to deposit sound weld metal. The tests consists of many variables, including the specific welding process, type of metal, thickness, joint design, position, and others. Most often, the test is conducted in accordance with a particular […]
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Welder
A welder is a tradesman who specialises in welding materials together. The materials to be joined can be metals (such as steel, aluminium, brass, stainless steel etc.) or varieties of plastic or polymer.
Welders typically have to have good dexterity and attention to detail. Depending upon the type of welding being undertaken, various safety precautions […]
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Weldability
The weldability of a material refers to its ability to be welded. Many metals and thermoplastics can be welded, but some are easier to weld than others. It greatly influences weld quality and is an important factor in choosing which welding process to use.
Steels
The weldability of steels is inversely proportional to a property known […]
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