Segmented chip formation during machining under the influence of different atmospheres
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F. Schaper
Florian Schaper studied mechanical engineering at Leibniz University Hannover from 2012 to 2020. He is a research assistant at the Institute of Production Engineering and Machine Tools at Leibniz University Hannover in the department cutting technology since 2020.
Benjamin Lengacker absolved an Apprenticeship as a material tester at Baker Hughes Celle from 2017 to 2021. He is now part of the analytics team at the Institute of Production Engineering and Machine Tools at Leibniz University Hannover since 2021. His main fields of expertise comprise metallography on various sorts of materials such as metals, plastics and ceramics.
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.
Kurzfassung
Hohe Temperaturen und ein stark ausgeprägter Segmentspan sind charakteristisch für die Titanzerspanung. Die Segmentspanbildung führt zu einer hochfrequenten mechanischen Wechsellast des Werkzeugs und begünstigt somit das Werkzeugversagen. Durch die Anwesenheit von Sauerstoff kommt es während des Spanbildungsvorgangs zu einer Vielzahl chemischer Wechselwirkungen. Welchen Einfluss der Sauerstoffgehalt bei der Titanzerspanung, insbesondere auf die Spanbildung hat, ist bisher jedoch unbekannt. Um Rückschlüsse auf den besagten Prozess ziehen zu können, wurden die Zerspanversuche unter Variation des Sauerstoffgehalts durchgeführt und die dabei erzeugten Späne metallographisch untersucht. Mittels Korngrenzenätzung konnte so die verschieden stark ausgeprägte Segmentierung im Span sichtbar gemacht und anschließend ausgewertet werden.
About the authors
Florian Schaper
studied mechanical engineering at Leibniz University Hannover from 2012 to 2020. He is a research assistant at the Institute of Production Engineering and Machine Tools at Leibniz University Hannover in the department cutting technology since 2020.
Benjamin Lengacker
absolved an Apprenticeship as a material tester at Baker Hughes Celle from 2017 to 2021. He is now part of the analytics team at the Institute of Production Engineering and Machine Tools at Leibniz University Hannover since 2021. His main fields of expertise comprise metallography on various sorts of materials such as metals, plastics and ceramics.
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- Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming
- Segmented chip formation during machining under the influence of different atmospheres
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- Picture of the Month
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Articles in the same Issue
- Contents
- Editorial
- Editorial
- Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming
- Segmented chip formation during machining under the influence of different atmospheres
- Lumen & Colours: A journey into the world of science
- Failure Analysis
- Cause analysis of the fluorescent displays on the guide vane platform
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting Diary
- Meeting Diary
