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Express Test Indentation for High-Resolution Mechanical Mapping of High-Entropy Alloys at High Temperatures

Express Test Indentation for High-Resolution Mechanical Mapping of High-Entropy Alloys at High Temperatures

Notas de Aplicação

Introduction

Useful for high-temperature applications, newly developed high-entropy alloys (HEA) exhibit superior mechanical properties at high temperature when compared with conventional superalloys or structural ceramics [1]. The term high-entropy is associated with the stable solid-solution formation phase resulting from high configurational entropy [2]. However, presence of multi-phase microstructures in some HEA compositions indicate that factors such as mixing enthalpy and hence solubility of elements may also be predominant when controlling segregations during solidification, therefore promoting multi-phase structures. Due to the equimolar presence of several elements in the alloying system, mechanical properties at high temperature are influenced by the diffusion rate of each element in multi-phase systems. 

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