Pairwise dilatational strain as a parametric model describing potential secondary phase formation and high-angle grain misorientation in as-cast high-entropy alloys

Leong，Zhaoyuan1; Huang，Yuhe1,3; Wróbel，Jan S.2; Gao，Junheng1,4; Morley，Nicola1; Goodall，Russell1

2022-05-01

10.1016/j.intermet.2022.107462

INTERMETALLICS   影响因子和分区

0966-9795

1879-0216

Crystallographic strain in high-entropy alloys (HEAs) can affect not only structure stability, but also their mechanical properties. This is studied by comparing the effects of different alloying additions in CoCrFeNi-A (A: Mn, V, Ti, Pd, and Pd) FCC HEAs on their calculated dilatational strains. Dilatational strain values are found to be proportional to the EBSD population of misoriented microstructures at 53–60°. Larger magnitudes of the dilatational strain are exhibited by FCC-stabilising alloying additions. EBSD and TEM suggest increased twin presence for higher strain compositions. This means that HEAs can be designed to present higher ductility if dilatational strain can be maximised when structural stability can be maintained. These model-property relationships can be incorporated into metaheuristic objective functions as an alloy design strategy.

Alloy design DFT High-entropy alloys Intermetallics Microstructure Prediction SEM

SCI ; EI

英语

其他

EU FP7/AccMet project[263206] ; Leverhulme Trust Research grant Scheme[RPG-2018-324] ; Royal Academy of Engineering[LTSRF1718_14_39] ; RAEng/Leverhulme Trust Senior Research Fellowships scheme[GB79-6] ; Interdisciplinary Centre for Mathematical and Computational Modelling (ICM) , University of Warsaw[GB79-6]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000796820900002

ELSEVIER SCI LTD

20220811684361

Alloying ; Cobalt alloys ; Design for testability ; Entropy ; High-entropy alloys ; Intermetallics ; Stability

Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Chromium and Alloys:543.1 ; Iron Alloys:545.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85124804252

Scopus

1.Department of Materials Science & Engineering,Sheffield,Sir Robert Hadfield Building, Mappin St, UK,S1 3JD,United Kingdom
2.Faculty of Materials Science and Engineering,Warsaw University of Technology,Warsaw,Ul. Wołoska 141,02-507,Poland
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,No. 1088, Xueyuan Avenue, Nanshan District,China
4.Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing,100083,China

Leong，Zhaoyuan,Huang，Yuhe,Wróbel，Jan S.,et al. Pairwise dilatational strain as a parametric model describing potential secondary phase formation and high-angle grain misorientation in as-cast high-entropy alloys[J]. INTERMETALLICS,2022,144.

Leong，Zhaoyuan,Huang，Yuhe,Wróbel，Jan S.,Gao，Junheng,Morley，Nicola,&Goodall，Russell.(2022).Pairwise dilatational strain as a parametric model describing potential secondary phase formation and high-angle grain misorientation in as-cast high-entropy alloys.INTERMETALLICS,144.

Leong，Zhaoyuan,et al."Pairwise dilatational strain as a parametric model describing potential secondary phase formation and high-angle grain misorientation in as-cast high-entropy alloys".INTERMETALLICS 144(2022).