Homogenization of AlxCoCrFeNi high-entropy alloys with improved corrosion resistance

Shi, Yunzhu; Collins, Liam; Feng, Rui; Zhang, Chuan; Balke, Nina; Liaw, Peter K.; Yang, Bin

doi:10.1016/j.corsci.2018.01.030

Title: Homogenization of Al_xCoCrFeNi high-entropy alloys with improved corrosion resistance

Journal Article · Fri Feb 02 00:00:00 EST 2018 · Corrosion Science

DOI:https://doi.org/10.1016/j.corsci.2018.01.030· OSTI ID:1483187

Shi, Yunzhu ^[1]; Collins, Liam ^[2]; Feng, Rui ^[3]; Zhang, Chuan ^[4];

^[2]; Liaw, Peter K. ^[3]; Yang, Bin ^[5]

Univ. of Science and Technology Beijing, Beijing (China); The Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The Univ. of Tennessee, Knoxville, TN (United States)
CompuTherm LLC, Middleton, WI (United States)
Univ. of Science and Technology Beijing, Beijing (China)

The present work investigates the homogenization effect of 1250 °C heat treatment on the Al_xCoCrFeNi high-entropy alloys (HEAs). The multi-phase microstructures with chemical segregations are inevitable with the increased Al content in the alloys, which cause work function variations and localized corrosion. After heat treatment, the homogenization effect revealed by the microstructure simplification and chemical-segregation reduction leads to the decreased work function variations and the improved corrosion resistance. Furthermore, thermodynamic calculations that are reliable to predict the phase transformations of the Al_xCoCrFeNi HEAs, indicates a further enhancement in corrosion resistance through annealing could be guided for many other HEAs systems.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Fossil Energy and Carbon Management (FECM)

Grant/Contract Number:: AC05-00OR22725; FE-0024054; FE-0011194; FE-0008855; 2012AA03A507; 2008AA031702; DMR-1611180

OSTI ID:: 1483187

Alternate ID(s):: OSTI ID: 1512320

Journal Information:: Corrosion Science, Vol. 133, Issue C; ISSN 0010-938X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 172 works

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