Oxy-acetylene gas welding, also known as gas welding, is a widely used welding process that makes use a flame produced by the combustion of a mixture of oxygen and acetylene gases to heat and melt the metal being welded. The flame is directed onto the metal, and as...
Atomic hydrogen welding is an arc welding process that makes use of hydrogen gas to surround and transfer heat from an arc to the base metal. An atomic hydrogen welding torch contains two tungsten metal electrodes that form the electric arc. Hydrogen gas (H2) is used...
Unusually high stresses may occur when a load is applied over a small area of contact. This phenomenon typically arises on a microscopic scale when a force is transmitted through two bodies in contact. Practical examples include contact of a wheel and a rail, valve...
To be able to describe the motion of a body in mathematical terms, we must first understand the type of motion it is undergoing. The equation(s) of motion to be used will vary depending on the situation under consideration. 1. Linear motion There are three general...
Powder metallurgy (PM) is a relatively new manufacturing method, although there is some evidence it was practiced by ancient civilisations such as the Egyptians and the Incas. The technique, as we know it today, developed in the late nineteenth and early twentieth...
