Selection of High Entropy Alloy for Solid Solution Using Multi-Criteria Decision Making Tool

Abstract:

High entropy alloys (HEA’s) have found a very special place in aerospace industries due to their property of forming solid solution. In past literatures on high entropy alloys, it is established that parameters like atomic size difference (), topological parameter (Ω) and electro-negativity difference (∆) plays a vital role in deciding whether solid solution will be formed or not. Therefore, the present study deals with the selection of optimal high entropy composition based on the three parameters δ, Ω and with the help of TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution). Ranking is done for 38 HEA different compositions such that the first rank represents the HEA which is most likely to form solid solution. The study reveals that TOPSIS method can be successfully implemented to predict the formation of solid solution in HEA’s.

• Periodical: Materials Science Forum (Volume 969)
• Pages: 466-471
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.969.466
• Online since: August 2019
• Authors: Vinay Kumar Soni*, Shubhashis Sanyal, Sudip Kumar Sinha
• Keywords: High Entropy Alloy, Intermetallic, Single Solid Solution, TCP, TOPSIS

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