Oxidative and abrasive wear of multiphase AlSi_0.75TiMnFeCu_x (X = 0, 0.25, 0.5) high entropy alloy under non-lubricating reciprocating motion

ABSTRACT

In this study, dry sliding wear of AlSi_0.75TiMnFeCu_x (x = 0, 0.25, 0.5) high-entropy alloy (HEA) produced through mechanical alloying (MA) and spark plasma sintering (SPS) was studied. The microstructure and phase evolution were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The wear behaviour of HEAs was assessed by reciprocating wear monitor under a dry air atmosphere. The findings demonstrated that AlSi_0.75TiMnFeCu_x HEAs were multiphase body-centred cubic (BCC/B2) solid solution structured with complex µ-, L₂₁, and Laves. It was discovered that the microhardness and wear behaviour of AlSi_0.75TiMnFeCu_x were comparable to AlSi_0.75TiMnFe HEA after the addition of Cu up to 0.25 molar ratio. The maximum hardness of the AlCu_0-0.5FeMnTiSi_0.75 HEAs reached around 1021–1035 HV. The tribology results show that an oxidative wear in AlSi_0.75TiMnFe while the mixed adhesive-abrasive wear mechanism was prominent in the AlSi_0.75TiMnFeCu_0.25-0.5 HEAs.

KEYWORDS:

• high entropy alloy
• wear
• powder metallurgy
• friction
• automotive

Authors Contribution

Hansung Lee: Conceptualization, Methodology, Validation, Investigation, Writing - Original Draft, Writing – Review & Editing. Minsu Kim: Validation, Investigation. Ashutosh Sharma: Investigation, Resources, Writing – Original Draft, Writing – Review & Editing, Visualization, Supervision. Byungmin Ahn: Conceptualization, Methodology, Writing – Review & Editing, Supervision, Project administration, Funding acquisition.

Data availability statement

The data required to reproduce these findings cannot be shared at this time as the research data is confidential.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) [grant number 2021R1A2C1005478].