TY - JOUR AU - Temesi, O. AU - Varga, Lajos Károly AU - Li, X. AU - Vitos, Levente AU - Nguyen Quang, Chinh TI - Estimation of Shear Modulus and Hardness of High-Entropy Alloys Made from Early Transition Metals Based on Bonding Parameters JF - MATERIALS J2 - MATERIALS VL - 16 PY - 2023 IS - 6 PG - 10 SN - 1996-1944 DO - 10.3390/ma16062311 UR - https://m2.mtmt.hu/api/publication/33756077 ID - 33756077 LA - English DB - MTMT ER - TY - JOUR AU - Tian, FY AU - Varga, Lajos Károly AU - Chen, NX AU - Shen, J AU - Vitos, Levente TI - Empirical design of single phase high-entropy alloys with high hardness JF - INTERMETALLICS J2 - INTERMETALLICS VL - 58 PY - 2015 SP - 1 EP - 6 PG - 6 SN - 0966-9795 DO - 10.1016/j.intermet.2014.10.010 UR - https://m2.mtmt.hu/api/publication/2782095 ID - 2782095 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Kaptay, György AU - Csicsovszki, G AU - Yaghmaee, M S TI - An Absolute Scale for the Cohesion Energy of Pure Metals JF - MATERIALS SCIENCE FORUM J2 - MATER SCI FORUM VL - 414-415 PY - 2003 SP - 235 EP - 240 PG - 6 SN - 0255-5476 DO - 10.4028/www.scientific.net/MSF.414-415.235 UR - https://m2.mtmt.hu/api/publication/1344187 ID - 1344187 N1 - Materials Science, Testing and Informatics I. Proceedings of the 3rd Hungarian Conference on Materials Science, Testing and Informatics, Balatonfüred, Hungary, October 14-17, 2001. Ed. by J. Gyulai. LA - English DB - MTMT ER -