Microstructure development and mechanical performance of Al2CrFeMnTi light-weight high entropy alloy

Jahangiri, Hadi; Mohagheghi, Samira; Alamdari, Armin Asghari; Yilmaz, R.; Bayrak, Kübra Gürcan; Yu, Feng; Ghadbeigi, Hassan; Ayas, Erhan; Motallebzadeh, Amir

doi:10.1016/j.intermet.2021.107376

Cited by 9 publications

(2 citation statements)

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“…The two other phases, namely BCC and L2 1 , are identified with their corresponding XRD peaks. These results are in agreement with refs , where C14, BCC, and L2 1 phases are reported for Al 1.5 CrFeMnTi, Al 2 CrFeMnTi, Al 3 CrFeMnTi 0.25 , and Al 4 CrFeMnTi 0.25 alloys.…”

Section: Resultssupporting

confidence: 93%

“…Therefore, the main strengthening mechanism is known to be SS hardening, which contributes to the exceptional mechanical properties of the HEAs . In practice, many HEAs include multiple phases, including SS and IM phases. − Despite the brittle nature of IM phases, the formation of a multiple-phase microstructure, especially if the microstructure can be designed such that IM phases are homogeneously dispersed in a matrix phase, could exhibit benefits from a mechanical property point of view due to precipitation hardening mechanisms as well as applications in high-temperature environments . Even though the majority of the HEA applications are structural, due to their mechanical properties, in recent years, these alloys are considered in functional applications such as diffusion barriers, catalysts, and hydrogen storage materials …”

Section: Introductionmentioning

confidence: 99%

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High Temperature Oxidation Behavior of the AlCrFeMnTi Light-Weight High-Entropy Alloy

Jahangiri

Mohagheghi

Alamdari

et al. 2023

ACS Appl. Eng. Mater.

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Light-weight high-entropy alloys (LWHEAs) are a class of engineering materials which have attracted wide research study as well as practical attention due to their unique properties along with low density. Future development of LWHEAs demands comprehensive research studies, including those on their high-temperature oxidation behavior. In this work, the microstructure, oxidation behavior, and mechanical properties of AlCrFeMnTi LWHEA was investigated. The samples were manufactured using mechanical alloying followed by spark plasma sintering techniques. After consolidation, a three-phase microstructure was formed, containing the C14, body-centered cubic, and L2 1 phases. The oxidation behavior of the samples in an ambient atmosphere after 1, 10, 30, and 60 h at 700 and 900 °C was investigated. The oxide scale formed at 700 °C exhibits a dense and compact structure, suggesting proper protection of the underlying metal at this temperature. Even though the same oxidation kinetics was detected at these temperatures, the oxidation rate and mass gain at 900 °C are higher. The morphology, size, and distribution of the three phases remain unchanged after the oxidation test, which gives rise to preservation of the mechanical properties, namely, hardness and modulus of elasticity, at both temperatures.

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Section: Resultssupporting

confidence: 93%