Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Evaluation of the chip separation mechanism during machining of an austenitic stainless steel
Submission Author:
Gil Magno Portal Chagas , SC
Co-Authors:
Izabel Machado, Gil Magno Portal Chagas
Presenter: Gil Magno Portal Chagas
doi://10.26678/ABCM.COBEM2017.COB17-1813
Abstract
The mechanisms involved in the chip formation and material separation in ductile metals is controversial. The common idea is that during machining the material is fractured and forms a new surface. Though, a crack ahead of the cutting edge has not been observed during the process. Another idea considers that the chip formation occurs with severe plastic deformation, around the cutting edge, according to a mechanism similar to an indentation, without material separation. To analyze the mechanisms involved in the chip separation of an austenitic stainless steel, a finite element simulation and experimental procedures were carried out. A quick stop device was used to obtain the chip roots for experimental observations. The machining simulation presented a severe plastic deformation near the cutting edge, and the stress state indicated a possible occurrence of chip fracture. The chip root observation indicated the evidence of ductile fracture with material separation during chip formation.
Keywords
machining, chip formation, Orthogonal cutting, austenitic stainless steel
