Influence of Intense Bulk Plastic Deformation on the Roughness of a Milled AISI 321 Stainless Steel Surface

Resumo

The roughness of a milled surface is investigated for AISI 321 austenitic stainless steel with different structure and mechanical properties. The grain size is modified by familiar methods of intense plastic deformation: ABC pressing and rolling. For milling, stainless-steel plates of different thickness are prepared. Cylindrical hard-alloy mills are employed. Analysis of the microgeometry of the machined surface indicates that change in structure and mechanical properties by intense plastic deformation decreases the height parameters S_a and S_z of the roughness by factors of 1.8–6.7.