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Indexed by:期刊论文

Date of Publication:2014-01-01

Journal:MATERIALS TRANSACTIONS

Included Journals:SCIE、EI、Scopus

Volume:55

Issue:1

Page Number:165-170

ISSN No.:1345-9678

Key Words:high-entropy alloy; bulk metallic glass; configurational entropy; mismatch entropy; atomic size difference; mixing enthalpy; alloy design

Abstract:The values of mixing enthalpy (Delta H-mix) and Delta parameter (delta) were calculated with 73 elements from Miedema's model for multicomponent equi-atomic alloys to investigate the possibilities of the alloys to be formed into high-entropy (H-E) alloys or high-entropy bulk metallic glasses (HE-BMGs). The equi-atomic alloys from about 15 million (C-73(5)) quinary to 621 billion (C-73(10)) decimal systems were evaluated by referring to a Delta H-mix-delta diagram for zones S and B's for H-E alloys with disordered solid solutions and BMGs, respectively, reported by Zhang et al. The results revealed that the number of quinary equi-atomic alloys plotted in zone S is 28405 (similar to 0.19% in C-73(5)), whereas those in zones B-1 and B-2 for conventional and Cu- and Mg-based BMGs, respectively, were 1036385 and 21518 (similar to 6.90 and similar to 0.14%), respectively. This kind of statistical approach using Delta H-mix-delta diagram will lead to finding out unprecedented H-E alloys and HE-BMGs.