Qiao, L., Ramanujan, R. V., Zhu, J. (2022). Effect of Aluminum on the Friction and Wear Behavior of AlxCrFeNi Medium‐Entropy Alloys. Advanced Engineering Materials, 24(7). Portico. https://doi.org/10.1002/adem.202101475
Abstract:
Several high‐entropy alloys (HEAs) and medium‐entropy alloys (MEAs) are promising for wear applications due to their excellent strength and fracture toughness. Herein, a series of MEAs (x = 0.3, 0.5, 0.8, 1.0, 1.2) are prepared by a vacuum arc‐melting techniques. The effects of Al content on the crystal structures and mechanical properties are evaluated in terms of hardness and wear resistance. With an increase in Al content, the microstructure changes from face‐centered cubic (FCC) + body‐centered cubic (BCC)/B2 phases to B2/BCC phases. A higher volume fraction of the BCC phase with increasing Al content favors spinodal decomposition. The Vickers microhardness increases from 345HV (x = 0.3) to 486HV (x = 1.2) with increasing Al content; a nanohardness size effect is revealed by nanoindentation tests. For high Al contents (x = 1.2), the coefficient of friction and wear rate reach the lowest value when the worn surface is smooth with smaller debris, indicating improved wear resistance. Furthermore, this series of MEAs exhibits wear related to abrasion, adhesion, and oxidation; the dominant wear mechanism is influenced by the Al content.
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Funding Info:
This research / project is supported by the Agency for Science, Technology and Research - Structural Metal Alloys Programme
Grant Reference no. : A18B1b0061
This research / project is supported by the Agency for Science, Technology and Research - AME Programmatic Fund
Grant Reference no. : A1898b0043
Description:
This is the peer reviewed version of the following article: Qiao, L., Ramanujan, R. V., & Zhu, J. (2022). Effect of Aluminum on the Friction and Wear Behavior of AlxCrFeNi Medium‐Entropy Alloys. Advanced Engineering Materials, 24(7). Portico. https://doi.org/10.1002/adem.202101475, which has been published in final form at https://doi.org/10.1002/adem.202101475. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.