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The effect of cooling rate on the microstructure and mechanical properties of NiCoFeCrGa high-entropy alloy
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap. Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, S-10044 Stockholm, Sweden.;Dalarna Univ, Mat Sci Grp, S-79188 Falun, Sweden..
Wigner Res Ctr Phys, Inst Solid State Phys & Opt, POB 49, H-1525 Budapest, Hungary.;Eotvos Univ Budapest, Dept Mat Phys, Pazmany P Setany 1-A, H-1117 Budapest, Hungary..
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Tillämpad materialfysik. Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, S-10044 Stockholm, Sweden..
Eotvos Univ Budapest, Dept Mat Phys, Pazmany P Setany 1-A, H-1117 Budapest, Hungary..
2019 (engelsk)Inngår i: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 54, nr 6, s. 5074-5082Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The effect of cooling rate on the microstructure and mechanical properties of equimolar NiCoFeCrGa high-entropy alloy (HEA) was studied by scanning electron microscopy, energy-dispersive X-ray spectroscopy and electron backscatter diffraction (EBSD), as well as by microhardness tests. Experimental results show that the cooling rate has a crucial impact on the developing microstructure which has a mixture of twoFCC and BCCphases, leading to a self-similarity of the solidified structure formed in the sample. Furthermore, the cooling rate influences both the composition of the two phase-components and the ratio of their volume fractions, determining the mechanical properties of the sample. The present results confirm the grouping of Co, Fe and Cr in the FCC phase and that of Ni and Ga in BCC phase in the NiCoFeCrGa high-entropy alloy system. An empirical rule is suggested to predict how the phase-components can be expected in this complex high-entropy alloy.

sted, utgiver, år, opplag, sider
Springer, 2019. Vol. 54, nr 6, s. 5074-5082
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URN: urn:nbn:se:kth:diva-240986DOI: 10.1007/s10853-018-03196-8ISI: 000453927400051Scopus ID: 2-s2.0-85058001002OAI: oai:DiVA.org:kth-240986DiVA, id: diva2:1277497
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QC 20190110

Tilgjengelig fra: 2019-01-10 Laget: 2019-01-10 Sist oppdatert: 2019-01-10bibliografisk kontrollert

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