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Evaluation of the bulk and alpha-case properties in Ti-6Al-4V at micro- and nano-metric length scale
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.
Department of Materials Science and Engineering, Universitat Politècnica de Catalunya, Barcelona.
Department of Materials Science and Engineering, Universitat Politècnica de Catalunya, Barcelona.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0002-7675-7152
Visa övriga samt affilieringar
2016 (Engelska)Ingår i: 13th World Conference on Titanium: August 16-20, 2015 * Manchester Grand Hyatt * San Diego, California / [ed] V. Venkatesh; A.L. Pilchak; J.E. Allison; S. Ankem; R. Boyer; J. Christodoulou; H.L. Fraser; M.A. Imam; J. Kosaka; H.J. Rack; A. Chaterjee; A. Woodfield, John Wiley and Sons , 2016, s. 1619-1624, artikel-id 271Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

In the present study the hardness of individual alpha (α)-Ti grains in Ti-6Al-4V was measured by nanoindentation using Berkovich tip indenter. Additionally, alpha-case layer was induced by performing isothermal heat treatment at 700°C in air for 500 hours. The average hardness of the α-Ti grains found in the bulk material and in the alpha-case layer were 6.7 ± 0.7 GPa and 9.4 ± 1.4 GPa, respectively. The high hardness of the α-Ti grains in the alpha-case layer is due to solid solution strengthening caused by interstitial oxygen diffusion. The thickness of the developed alpha-case layer was estimated metallographically and compared with that measured from a hardness profile performed along the layer. Moreover, electron back-scattered diffraction was used to determine the local crystallographic orientation, the texture of the alloy microstructure, as well as phase fraction changes, where the nanoindentation measurements were performed.

Ort, förlag, år, upplaga, sidor
John Wiley and Sons , 2016. s. 1619-1624, artikel-id 271
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Annan materialteknik
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Materialteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-35257Lokalt ID: 9b6349dd-547a-4f04-83c8-b2775ccabe0dOAI: oai:DiVA.org:ltu-35257DiVA, id: diva2:1008509
Anmärkning
Upprättat; 2016; 20160513 (birsef)Tillgänglig från: 2016-09-30 Skapad: 2016-09-30 Senast uppdaterad: 2018-03-05Bibliografiskt granskad

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Sefer, BirhanPederson, RobertAntti, Marta-Lena

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