513 search results

Plasma arc cutting
Science, Maths & Technology

Plasma arc cutting

...aluminium, mild steel, carbon steel, stainless steel, copper, cast iron, molybdenum, monel, inconel, magnesium and titanium. A heat-affected zone of up to 5 mm can occur depending on material, thickness and cutting speed. In some materials gas pick-up may occur from the plasma and/or shielding gas, e.g. hydrogen pick-up in steel. Design: Although thicknesses from 0.75 to...
Electro-slag welding
Science, Maths & Technology

Electro-slag welding

...aluminium alloys if required. The weld metal acquires the structure of a casting, wherein the sizes and orientations of the grains are governed by heat removal characteristics. Long columnar grains can be formed with microsegregation and agglomeration of defects, such as slag, inclusions and gas porosity, along the grain boundaries. There is also a large heat-affected...
How old is a mountain range?
Science, Maths & Technology

How old is a mountain range?

...sand timer where we know the rate at which sand falls through the timer. If we turn over the sand timer, letting the sand fall from the top to the bottom, and want to know how long it had been turned over for, we could compare how much sand is in the top versus the bottom. Similarly, we can compare how much uranium and how much lead there is in a mineral to work ......
Past-Time Lover
History & The Arts

Past-Time Lover

...Day upon us and love in the air, we have cast our eye over some iconic figures throughout history and considered how they may have represented themselves if thrown into the modern dating world. Who would you be most likely to spend Valentine’s Day with? Let us know by casting your vote below! [Valentine's Day Featured] The choice... Create your own user feedback survey...
Bridges and Buildings: The structures of the Industrial Revolution
History & The Arts

Bridges and Buildings: The structures of the Industrial Revolution

...cast iron from a blast furnace, and designed in large pieces which could be fitted together and hoisted into position relatively easily. The joints in the structure are similar to those used in woodwork, using wedges, chocks and dovetails to give firm connections (Figure 2). Figure 2: Wedges, chocks and dovetails give strong connections Some parts of the bridge cracked...
Magneform (electromagnetic assembly and forming)
Science, Maths & Technology

Magneform (electromagnetic assembly and forming)

...aluminium tube is inserted into the coil, then a pressure pulse can deform the metal. Stages in tube shrinking [Images to demonstrate 'Magneform (electromagnetic assembly and forming)' - see article ] Manufacture: In electromagnetic forming, the electrical energy from a capacitor bank is passed through a coil. A large magnetic field builds up around the coil, inducing a...
Codi ymwybyddiaeth a chymorth i ddynion
Health, Sports & Psychology

Codi ymwybyddiaeth a chymorth i ddynion

...Sands Utd. Trefnodd sylfaenydd Sands Utd, Rob Allen, gêm bêl-droed elusennol ar ôl i ferch fach ef a'i wraig Charlotte, farw ar 9 Hydref 2017. Cafodd y pâr eu cefnogi gan Sands, elusen sy'n cefnogi rhieni mewn profedigaeth yn dilyn colli beichiogrwydd a marwolaeth cyn geni. Fodd bynnag, mewn un cyfarfod cymorth, sylwodd Rob fod 24 o fenywod a dim ond 3 dyn yn...
Laser beam welding
Science, Maths & Technology

Laser beam welding

...aluminium at high speeds. The GTA welding torch can be placed above or below the workpiece. Laser and gas tungsten arc welding [Images to demonstrate 'Laser beam welding' - see article ] Manufacture: An alternative to resistance, arc and electron beam welding for spot, butt and lap welding of sheet materials. Single pass, deep penetration welds are possible at 10–20x...