Segmented chip formation during machining under the influence of different atmospheres

Abstract High temperatures and a pronounced segmented chip are characteristic of titanium machining processes. The formation of segmented chips induces an alternating high frequency mechanical load on the tool and thus promotes tool failure. The presence of oxygen triggers a multitude of chemical interactions during the chip forming process. However, the oxygen content’s impact during titanium machining, especially on the chip formation, is unknown. In order to draw conclusions on this process, the machining tests were carried out while varying the oxygen content. The thus produced chips were metallographically examined. The varying degree of segmentation could then be visualized by boundary etching and subsequently be evaluated.