Regulating of wear properties through microstructure engineering in novel cost-effective Fe30Ni25Cr25Mo10Al10 high-entropy alloy processed by cyclic closed-die forging
Majid Naseri, Alena Myasnikova, Davood Gholami, Omid Imantalab, Dmitry Mikhailov, Mostafa Amra, Nataliya Shaburova, Milena Efimova, Aleksandr Orlov, Seyedmehdi Hosseini, Yong-Cheng Lin, Abdel‐Hamid I. Mourad, Evgeny Trofimov
Abstract
This study presents a novel cost-effective Fe 30 Ni 25 Cr 25 Mo 10 Al 10 high-entropy alloy with a dual-phase microstructure that was processed using cyclic closed-die forging (CCDF) at room temperature for a maximum of six passes. The as-homogenized alloy exhibited [CrMoFe]-rich dendrites with dual-size morphology dispersed in an almost uniform face-centered cubic (FCC) matrix. It was found that as the number of CCDF passes increased, leading to a more homogenous nanograin, there was an accumulation of dislocations, fragmentation of [CrMoFe]-rich dendrites, and enhanced distribution within the matrix. These conditions were conducive to the creation of a nanostructured Fe 30 Ni 25 Cr 25 Mo 10 Al 10 alloy with superior mechanical properties. Texture analysis indicated that the prominent texture components for the Fe 30 Ni 25 Cr 25 Mo 10 Al 10 alloy after six passes were Rotated Cube {001}<110>, S {123}<634>, and Dillamore {4 4 11}<11 11 8>. After the sixth CCDF pass, the Fe 30 Ni 25 Cr 25 Mo 10 Al 10 alloy exhibited the highest microhardness (∼ 974 HV) and the lowest wear rate (∼ (0.8 ± 0.1) × 10 –5 mm 3 .N −1 .m −1 ). Additionally, it was proposed that the development of the Rotated Cube {001}<110> texture component contributed positively to enhancing wear resistance in the cost-effective high-entropy alloys. Considering the obtained results, it is reasonable to propose that CCDF processing is significant potential for the advancement of cost-effective nanostructured high-entropy alloys for industrial applications. • Novel cost-effective Fe 30 Ni 25 Cr 25 Mo 10 Al 10 high-entropy alloy was subjected to cyclic closed-die forging (CCDF). • Ultrahigh hardness and lowest wear rate were successfully achieved in the CCDF-processed Fe 30 Ni 25 Cr 25 Mo 10 Al 10 alloy. • Rotated Cube {001}<110> texture component contributed positively to enhancing wear resistance in the cost-effective HEAs. • CCDF was suggested as an effective approach for developing nanostructured HEAs.