Experimentation on the residual stresses generated by endmilling

Residual stress measurements front endmilling of annealed AISI 4340 have be en made at multiple points within the cut geometry to investigate the effec ts of location on the machining-induced residual stresses front endmilling. In the same experiments the effects of axial depth of cut and feed on the, residual stresses induced in the machined surface have been investigated i n a design of experiments framework. The experimentation demonstrates that location, feed and axial depth of cut have strong influences on the machini ng-induced residual stresses from end-milling when expressed in a work-piec e coordinate frame. In addition, expression of the residual stresses in a c oordinate frame fixed in the tool demonstrates a simplification tit the res idual stresses front endmilling in that the stresses at multiple locations within the cut geometry show strong similarities when expressed in this coo rdinate frame.