Superplastic behavior of Al15(CuFeMn)85 immiscible medium-entropy alloy

In this study, the superplastic behavior and microstructural characteristics of the high pressure torsion-processed Al-15(CuFeMn)(85) immiscible medium-entropy alloy (IMMEA) were investigated. The multi-phase structure generated through spinodal-like decomposition in IMMEA played a key role in maintaining the ultra-fine structure and preserving an equiaxed shape during testing at high temperatures, ultimately leading to superplastic behavior. The IMMEA exhibited similar to 460% superplasticity at a strain rate of 10(-3) s(-1) and a temperature of 873 K (0.56 homologous temperature). This study is the first IMMEA superplasticity study and these results contribute to a better comprehension of the phenomenon.

Automated summary

In this study, the superplastic behavior and microstructural characteristics of the high pressure torsion-processed Al-15(CuFeMn)(85) immiscible medium-entropy alloy (IMMEA) were investigated. The multi-phase structure generated through spinodal-like decomposition in IMMEA played a key role in maintaining the ultra-fine structure and preserving an equiaxed shape during testing at high temperatures, ultimately leading to superplastic behavior. This study is the first IMMEA superplasticity study and these results contribute to a better comprehension of the phenomenon.