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2. Orbital welding - Wikipedia

   en.wikipedia.org/wiki/Orbital_welding

   The charring is carbon deposits which can conduct electricity and short circuit the flow of current from the tungsten. Weld heads contain a system of precision planetary gears that can wear out over time. Proper cleaning and maintenance is required. Successful orbital welding is also dependent upon using high quality tubing material.

3. Tungsten - Wikipedia

   en.wikipedia.org/wiki/Tungsten

   Physical properties. In its raw form, tungsten is a hard steel-grey metal that is often brittle and hard to work. Purified, monocrystalline tungsten retains its hardness (which exceeds that of many steels), and becomes malleable enough that it can be worked easily. [ 18] It is worked by forging, drawing, or extruding but it is more commonly ...

4. Gas tungsten arc welding - Wikipedia

   en.wikipedia.org/wiki/Gas_tungsten_arc_welding

   Gas tungsten arc welding ( GTAW, also known as tungsten inert gas welding or TIG, and heliarc welding when helium is used) is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area and electrode are protected from oxidation or other atmospheric contamination by an inert shielding gas ( argon or ...

5. Tungsten carbide - Wikipedia

   en.wikipedia.org/wiki/Tungsten_carbide

   Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering [7] for use in industrial machinery, cutting tools, chisels, abrasives, armor-piercing shells and jewelry.

6. Jewellery - Wikipedia

   en.wikipedia.org/wiki/Jewellery

   The most common are high-polish, satin/matte, brushed, and hammered. High-polished jewellery is the most common and gives the metal a highly reflective, shiny look. Satin, or matte finish reduces the shine and reflection of the jewellery, and this is commonly used to accentuate gemstones such as diamonds. Brushed finishes give the jewellery a ...

7. ‘Night owls’ appear to have better brain function, new study ...

   www.aol.com/night-owls-appear-better-brain...

   West is the lead author of a new study recently published in the journal BMJ Public Health that found that getting between 7 and 9 hours of sleep each night was optimal for brain health. The ...