Journal Article

FZJ-2017-07496

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Study on a High Entropy Alloy by High Energy Synchrotron X-Ray Diffraction and Small Angle Neutron Scattering

Song, W. (Corresponding author) ; Radulescu, A.FZJ* ; Liu, L. ; Bleck, W.

2017
Wiley-VCH73294 Weinheim

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Please use a persistent id in citations: doi:10.1002/srin.201700079

Abstract: In the present work, a quaternary CoCrFeNi high entropy alloy (HEA) is investigated by means of high energy synchrotron X-ray diffraction (SYXRD) and small angle neutron scattering (SANS). At the as-forged state, the microstructure of CoCrFeNi HEA is pure austenite. The as-cast dendritic structure has been eliminated by the hot forging at about 1100 °C and the average grain size obtained is approximately 11.6 μm. The result shows pronounced lattice distortion phenomenon in CoCrFeNi HEA, which supposedly contributes to the solid solution strengthening of the alloy. The CoCrFeNi HEA exhibits good yield strength (Rp0.2 = 710 MPa at room temperature and Rp0.2 = 660 MPa at 500 °C). The small angle neutron scattering results further indicate the local ordering effect in the fcc solid solution of CoCrFeNi HEA at both room temperature and at 500 °C after tensile deformation.

Keyword(s): Engineering, Industrial Materials and Processing (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
2. Neutronenstreuung (Neutronenstreuung ; JCNS-1)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
2. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)

Experiment(s):

1. KWS-2: Small angle scattering diffractometer (NL3ao)

Appears in the scientific report 2017

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Database coverage:
Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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