![]() The particle size may vary from millimeters to nanometers. Wear of metals occurs by plastic displacement of surface and near-surface material and by detachment of particles that form wear debris. Abrasive wear alone has been estimated to cost 1-4% of the gross national product of industrialized nations. Thus, wear has large economic relevance as first outlined in the Jost Report. Wear in machine elements, together with other processes such as fatigue and creep, causes functional surfaces to degrade, eventually leading to material failure or loss of functionality. The study of wear and related processes is referred to as tribology. Causes of wear can be mechanical (e.g., erosion) or chemical (e.g., corrosion). Wear is the damaging, gradual removal or deformation of material at solid surfaces. Right, used, shows obvious wear from being driven clockwise.
0 Comments
Leave a Reply. |