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Influence of alpha–case layer on the low cycle fatigue properties of Ti–6Al–2Sn–4Zr–2Mo alloy
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0001-6613-7876
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0003-3661-9262
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0002-7675-7152
2014 (engelsk)Inngår i: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 599, s. 51-56Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Strain–controlled low cycle fatigue properties of Ti–6Al–2Sn–4Zr–2Mo with different thickness of alpha–case layers were investigated. Results show that at strain amplitudes 0.3 and 0.4%, the fatigue life of the alloy is reduced for the specimens with alpha–case layer compared to the ones without any alpha–case. It was noted that with a 2 μm thick alpha–case layer the low cycle fatigue life is reduced about 50% at the higher strain amplitude. The degrading effect of the alpha–case layer on fatigue life increased with increasing thickness. The alpha–case layer at the surface is enriched with oxygen making the surface harder and brittle, which results in easier crack initiation and thus decrease in fatigue life.

sted, utgiver, år, opplag, sider
2014. Vol. 599, s. 51-56
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Materialteknik
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URN: urn:nbn:se:ltu:diva-3224DOI: 10.1016/j.msea.2014.01.059ISI: 000334004400009Scopus ID: 2-s2.0-84893768179Lokal ID: 1055bd6d-5071-48cc-b780-8e6d6f2b425cOAI: oai:DiVA.org:ltu-3224DiVA, id: diva2:976080
Merknad
Validerad; 2014; 20140204 (andbra)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Gaddam, RaghuveerAntti, Marta-LenaPederson, Robert

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