Phase formation rules
Book chapter, 2016
This chapter gives an overview of existing active phase formation rules for high-entropy alloys (HEAs). A parametric approach using physiochemical parameters including enthalpy of mixing, entropy of mixing, melting points, atomic size difference, and valence electron concentration is used to delineate phase formation rules for HEAs, with a reference to other multicomponent alloys like bulk metallic glasses (BMGs). Specifically, rules on forming solid solutions, intermetallic compounds, and the amorphous phase are described in detail; formation rules of solid solutions with the face-centered cubic (fcc) or body-centered cubic (bcc) structure are also discussed. Some remaining issues and future prospects on phase formation rules for HEAs are also addressed at the end. © Springer International Publishing Switzerland 2016.
Solid solution
Enthalpy of mixing
Empirical rules
Multiphase
Single phase
Valence electron concentration e/a ratio
Face-centered cubic (fcc)
Hume-Rothery rules
High-entropy alloys (HEAs)
Body-centered cubic (bcc)
Hexagonal close-packed (hcp)
Electronegativity difference
Bulk metallic glasses
Atomic size difference
Entropy of mixing
Author
Yong Zhang
University of Science and Technology Beijing
Sheng Guo
Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering
C. T. Liu
City University of Hong Kong
Xiao Yang
University of Science and Technology Beijing
High-Entropy Alloys: Fundamentals and Applications
21-49
9783319270135 (ISBN)
Subject Categories (SSIF 2011)
Materials Engineering
DOI
10.1007/978-3-319-27013-5_2
ISBN
9783319270135