Quantitative determination of the lattice constant in high entropy alloys. (15th March 2019)

• Record Type: Journal Article
• Authors: Wang, Zhijun; Wu, Qingfeng; Zhou, Wenquan; He, Feng; Yu, Chunyan; Lin, Deye; Wang, Jincheng; Liu, C.T.
• Is Part Of: Scripta materialia. Number 162(2019)
• Page Start: 468
• Page End: 471
• Publication Date: 2019-03-15
• Subjects: Lattice constant -- Binary alloys -- High entropy alloys -- Chemical interaction; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.12.022
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The variation of the lattice constant with alloying elements is an essential issue in alloy design. In the traditional single-based alloys, there is a tremendous database for predicting the lattice constant. However, the traditional database is not suitable to the emerging multi-principal components alloys referred as high entropy alloys. Here, a framework is proposed to describe the variation of lattice constants in high entropy alloys. Based on the quantitative measurement of the lattice constants of fourteen alloys, we constructed the lattice constant database for concentrated CoCrFeNi alloys. The discrepancy between binary alloys and high entropy alloys revealed the atomic chemical interactions. Graphical abstract: Quantitative determination of the lattice constant in CoCrFeNi high entropy alloys. A model is proposed to describe the lattice constant in high entropy alloys. The coefficients in the model are obtained from the precise XRD measurements of designed CoCrFeNi alloys with different compositions. The results greatly derivate the traditional binary alloys. Unlabelled Image