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Predicting Chemical Wear in Machining Titanium Alloys Via a Novel Low Cost Diffusion Couple Method
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Physical Metallurgy.ORCID iD: 0000-0001-8797-4585
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2016 (English)In: Procedia CIRP, Elsevier, 2016, 219-222 p.Conference paper (Refereed)
Abstract [en]

Chemical wear during high speed machining of titanium alloys is a serious problem which affects the surface integrity of both the tool and workpiece. A low cost, novel diffusion couple method is presented which allows for thorough analysis of the tool-workpiece interface at the high temperatures reached during conventional machining operations. X-EDS analysis reveals that no less than seven distinct diffusion zones arise between Ti-6Al-4 V and a WC-Co tool which are home to different phases and reaction species. Loss of cobalt binder coupled with a deficit of carbon results in a brittle η-phase leading to catastrophic fracturing of the tool. DICTRA is employed to thermodynamically model the diffusion mechanisms and verify the X-EDS results.

Place, publisher, year, edition, pages
Elsevier, 2016. 219-222 p.
Keyword [en]
Alloy chemistry, Alloy design, DICTRA, Diffusion, Machining, Titanium, Tool wear, Carbide cutting tools, Carbon, Cost benefit analysis, Cutting tools, Alloy designs, Conventional machining, Diffusion mechanisms, High speed machining, Surface integrity, Titanium alloys
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-195435DOI: 10.1016/j.procir.2016.01.196ScopusID: 2-s2.0-84978643573OAI: oai:DiVA.org:kth-195435DiVA: diva2:1050279
Conference
3rd CIRP Conference on Surface Integrity, CIRP CSI 2016, 8 June 2016 through 10 June 2016
Note

QC 20161128

Available from: 2016-11-28 Created: 2016-11-03 Last updated: 2016-11-28Bibliographically approved

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Larsson, Henrik
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Physical Metallurgy
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