Synergic strengthening by oxide and coherent precipitate dispersions in high-entropy alloy prepared by powder metallurgy

0494662 - ÚFM 2019 RIV GB eng J - Journal Article
Moravčík, I. - Gouvea, L. - Horník, Vít - Kováčová, Z. - Kitzmantel, M. - Neubauer, E. - Dlouhý, Ivo
Synergic strengthening by oxide and coherent precipitate dispersions in high-entropy alloy prepared by powder metallurgy.
Scripta Materialia. Roč. 157, DEC (2018), s. 24-29. ISSN 1359-6462. E-ISSN 1872-8456
R&D Projects: GA MŠMT(CZ) EF16_025/0007304
Institutional support: RVO:68081723
Keywords : Mechanical alloying * Strength * Tension test * Oxide dispersion strengthened (ODS) alloy * Spark plasma sintering
OECD category: Materials engineering
Impact factor: 4.539, year: 2018
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S1359646218304536?via%3Dihub

The present work deals with the synthesis and evaluation of the microstructural and mechanical properties of face-centred cubic Ni1.5Co1.5CrFeTi0.5 high-entropy alloy strengthened by nano-sized titanium oxide dispersion and coherent precipitates of Ni3Ti intermetallic phase produced by powder metallurgy. The alloy's properties are well tuneable by the use of proper heat treatment. The alloy exhibits an excellent combination of tensile strength and ductility, reaching an ultimate tensile strength of 1460 MPa and elongation of 14.5% in solution annealed state and 1660MPa and 4.8% in the aged condition.Most of the strengthening contribution was attributed to Orowan-type strengthening mechanism.
Permanent Link: http://hdl.handle.net/11104/0289468