Residual Stresses in Machining Operations
By definition, the residual stresses are multiaxial static stresses that exist in an isolated component without any applied external force or moment, and they are in mechanical equilibrium. Residual stresses are the response to the mechanical and structural history of the component during its manufacturing (metal casting, metal forming, machining, heat treatment, etc.) and in service when submitted to external loadings (thermal, mechanical, and chemical). They are caused by the elastic response of the material to the heterogeneous plastic deformation at any scale of the component or structure.
Theory and Applications
The quality of mechanical components depends on large extend on the surface integrity, which is characterized by the mechanical, metallurgical, and chemical states of the machined affected layers (Jawahir et al. 2011). The residual stresses, together with the hardness, yield stress, tensile strength, etc., characterize the mechanical state of the...
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