Chemical complexity induced local structural distortion in NiCoFeMnCr high-entropy alloy. Issue 8 (3rd August 2018)

• Record Type: Journal Article
• Authors: Zhang, Fuxiang; Tong, Yang; Jin, Ke; Bei, Hongbin; Weber, William J.; Huq, Ashfia; Lanzirotti, Antonio; Newville, Matt; Pagan, Darren C.; Ko, J. Y. P.; Zhang, Yanwen
• Is Part Of: Materials research letters. Volume 6:Issue 8(2018)
• Page Start: 450
• Page End: 455
• Publication Date: 2018-08-03
• Subjects: Solid solution alloys -- neutron diffraction -- EXAFS -- local structure; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2018.1478332
• Languages: English
• ISSNs: 2166-3831

Abstract

ABSTRACT: In order to study chemical complexity-induced lattice distortion in high-entropy alloys, the static Debye–Waller (D-W) factor of NiCoFeMnCr solid solution alloy is measured with low temperature neutron diffraction, ambient X-ray diffraction, and total scattering methods. The static atomic displacement parameter of the multi-element component alloy at 0 K is 0.035–0.041 Å, which is obvious larger than that of element Ni (∼ 0 Å). The atomic pair distance between individual atoms in the alloy investigated with extended X-ray absorption fine structure (EXAFS) measurements indicates that Mn has a slightly larger bond distance (∼0.4%) with neighbor atoms than that of others. GRAPHICAL ABSTRACT: IMPACT STATEMENT: The chemical complexity induced local structural disorder in the high entropy alloy is distinguished from the thermal contribution by the combination of neutron and X-ray techniques.