Abstract
A technique is described for embossing an orthogonal array of lines (grid) on prepared metal surfaces. Workpieces of oxygen-free high conductivity copper and 18% nickel maraging steel were machined orthogonally under dry unlubricated conditions and the plastic strain distribution in the surface region was determined from the distortion of the array. It is shown that appreciable plastic strain can be produced, the distribution of which is complex. It is suggested that such strains may be important in machining because they can affect the residual stress distribution which, in turn, can have a controlling influence on the behavior of components in service with respect to their resistance to fatigue, creep and stress corrosion cracking.
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