Abstract

The research and development of high-entropy alloys (HEAs) and complex-concentrated alloys (CCAs) are growing rapidly, focusing on the enhanced properties of these alloys. However, so far, their manufacturing has not exceeded the laboratory scale. To meet this challenge, a combination of the processing characteristics and methods along with their sustainable production must be ensured. Moving towards a circular economy, this includes the utilization of low-cost, widely available scrap for the manufacturing of CCAs. Changing the raw materials, can ensure a cost-efficient production and paves the way to surpass major limitations in the industrial manufacturing of CCAs. Examples of a novel lightweight CCA design approach will be presented in this work.

Highlights

  • Alloys fall into the multi-principal element alloys (MPEAs) category when they consist of a large number of alloying elements in high concentrations, whereas at least two of them act as the principle-base elements [16]

  • It is evident that the manufacturing process of these alloys is characterized by high expenses

  • Typical production of aluminum alloys consists of high-purity high expenses

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Summary

Introduction

Alloys fall into the MPEAs category when they consist of a large number of alloying elements in high concentrations, whereas at least two of them act as the principle-base elements [16] These new definitions do not create any implications neither to the effect nor to the importance of configurational entropy [14,16]. These type of alloys (HEAs, CCAs and MPEAs) are manufactured by vacuum arc melting (VAM) and vacuum induction melting (VIM) techniques in an Ar or N2 protective atmosphere and casting in a water-cooled copper mold [17] These techniques are chosen due to the high melting point of various raw materials. In spite of the high-cost casting process, HEAs and CCAs are susceptible to some castability and liquidity issues and the desired compositional homogeneity is not always achieved This is due to the high concentrations of multiple alloying elements. Since the bottom line for most commercial alloys manufacturing is the cost of the product, the focus point of the current study is to examine the economic viability of the discussed concept

Complex Concentrated Alloys
Conventional
Findings
Approach and Discussion
Conclusion-Outlook

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