Main Article Content
The Effects of Some Environmental Substances on the Outer Boundaries of Copper Specimen in Plain Torsion
Abstract
This study investigated the effects of Environmental Substances (E.S.), i.e., carbon tetrachloride (CCl4), benzene, ethyl alcohol, pipe-borne (tap) water, charcoal and air on a copper specimen in torsion. Applying torsion to the specimen was an attempt to simulate the metal cutting conditions that take place during machining processes. It was discovered that the E.S. on the outer surface of the copper specimen reduced the shear strain energy and power to fracture. The CCL4, benzene and ethylalchhohol reduced the strain energy and power sufficiently to be useful as additives in metal cutting coolants. One or a combination of these three when added to coolants will reduce machining cost as lower power will be generated by the cutting machines. It was also
discovered that the reduction in strain energy and power was facilitated by the roughness of the surface finish of specimen.
Keywords: Environmental substances, slip planes, micro-cracks, plastic deformation, intergranular corrosion.
Journal of Applied Science, Engineering and Technology Vol. 6 (1) 2006 pp. 76-80
