Relative effect of electronegativity on formation of high entropy alloys. (August 2015)

• Record Type: Journal Article
• Authors: Ji, X.
• Is Part Of: International journal of cast metals research. Volume 28:Number 4(2015)
• Page Start: 229
• Page End: 233
• Publication Date: 2015-08
• Subjects: Metal castings -- Periodicals; Founding -- Periodicals; Foundry research -- Periodicals; Foundry chemistry -- Periodicals; 671.2
• DOI: 10.1179/1743133615Y.0000000004
• Languages: German
• ISSNs: 1364-0461

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>From the view point of chemical compatibility of elements, the electronegativity difference Δ<italic>e</italic> was investigated as a characterisation parameter to evaluate the formation possibility of solid solution phases. The relationship between the formation of high entropy alloys (HEAs) and Δ<italic>e</italic> indicates that a lower value of Δ<italic>e</italic> is favourable to form solid solution phases. Based on the rule of topological stability and chemical compatibility, a δ − Δ<italic>e</italic> plot was built, and four multicomponent alloys were designed. X-ray diffraction results show that three of the four designed alloys were fabricated as HEAs by arc melting and suction casting. The new HEA FeCoCuNiAgGe with the lowest value of Δ<italic>e</italic> has typical dendrite and interdendrite microstructures, and the phase separation phenomenon is a common characteristic of the designed alloys containing Ag. Therefore, the application of Δ<italic>e</italic> can explore the composition range for the development of new HEAs.</p> </abstract>