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Solid solutioning in equiatomic alloys: Limit set by topological instability

Sheng Guo (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; C. Ng ; Z. Wang ; C. Liu
Journal of Alloys and Compounds (0925-8388). Vol. 583 (2014), p. 410-413.
[Artikel, refereegranskad vetenskaplig]

Solid solutioning in equiatomic alloys becomes an interesting and timely topic, considering the current interest at high-entropy alloys (HEAs) in the materials community. In the circumstances where there is no such a differentiation of the solvent and solutes, it is intriguing to explore the solid solution limit in HEAs. In this work, a series of fcc structured equiatomic alloys were specially designed, following the valence electron concentration rule, to study the solid solutioning in the assumed pseudo binary Ni-X (X = Co, Fe, Cr, Cu) systems. The solid solution limit of the multi-component equiatomic alloys was found to set by the topological instability. The decomposition of the single-phase solid solution occurred when the lattice distortion reached a critical strain of 0.018. © 2013 Elsevier B.V. All rights reserved.

Nyckelord: High-entropy alloys , Multicomponent solidification , X-ray diffraction

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Denna post skapades 2013-11-15. Senast ändrad 2015-12-17.
CPL Pubid: 186876


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