Empirical design of single phase high-entropy alloys with high hardness

Tian, FY ✉; Varga, LK [Varga, Lajos Károly (Szilárdtestfizika), szerző] Hosszútávú rend kondenzált rendszerekben csoport (SZFI / ESZO); Chen, NX; Shen, J; Vitos, L [Vitos, Levente (szilárdtestfizika), szerző] Hosszútávú rend kondenzált rendszerekben csoport (SZFI / ESZO)

Angol nyelvű Szakcikk (Folyóiratcikk) Tudományos
Megjelent: INTERMETALLICS 0966-9795 1879-0216 58 pp. 1-6 2015
  • SJR Scopus - Materials Chemistry: D1
Azonosítók
Szakterületek:
  • Fizika
Abstract We collect the available basic properties of nearly 100 high-entropy alloys (HEAs) with a single face centered cubic (fcc) or body centered cubic (bcc) phase. HEAs crystallizing in the fcc structure are mainly composed of the late 3d elements (LTM-HEAs), whereas HEAs consisting of the early (refractory) transition elements and the LTM-HEAs containing an increased level of bcc stabilizer form the bcc structure. Guided by the solid solution theory, we investigate the structure and hardness of HEAs as a function of the valence electron concentration (VEC) and the atomic size difference (δ). The fcc structure is found for VEC between 7.80 and 9.50, whereas the structure is bcc for VEC between 4.33 and 7.55. High strength is obtained for an average valence electron number VEC ∼ 6.80 and for an average atomic size difference δ ≈ 6%. Based on these empirical correlations, one can design the high-entropy alloys with desired hardness.
Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
2025-02-13 14:16