Development of a large size FCC high-entropy alloy with excellent mechanical properties

Tang, Kai; Chen, L.B.; Wang, S.; Wei, Ran; Yang, Zhiqiang; Jiang, F.; Sun, Jun

doi:10.1016/j.msea.2019.138039

Cited by 26 publications

(1 citation statement)

References 41 publications

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“…The concept of multi-component alloys (MCAs) breaks the design bottleneck of traditional alloys with single or two main elements and has been explored extensively over the past two decades [1][2][3][4]. Initially, MCAs were studied based on single FCC, BCC or HCP structures, and the designed single-phase MCAs exhibited better mechanical and physicochemical properties than traditional alloys [5][6][7][8][9][10]. However, in recent years, research focus has gradually changed to dual-phase MCAs, and the heterophase structure was intentionally beneficial for improving the mechanical properties of alloys [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing and Double Aging on the Microstructure and Mechanical Properties of Hot-Rolled Al17Cr10Fe36Ni36Mo1 Alloy

Qiu,

Shi,

Liu

et al. 2024

Metals

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AlCrFeNi multi-component alloys with excellent mechanical properties have been designed and extensively investigated in recent years. The massive fabrication of sheets will be an effective way for industrial application, where hot rolling is the inevitable process. After hot rolling, the mechanical properties could be further tailored. In this study, the effects of heat treatments on a dual-phase Al17Cr10Fe36Ni36Mo1 hot-rolled plate were systematically investigated, including: (i) annealing (700 °C, 850 °C, 1000 °C and 1150 °C for 1 h, respectively), (ii) solution and single aging (1150 °C for 1 h and 700 °C for 4 h), (iii) solution and double aging (1150 °C for 1 h, 700 °C for 4 h and 650 °C for 1 h). The B2 precipitates with varied morphologies were observed in the FCC matrix of the hot-rolled alloy after a heat treatment range from 700 °C to 1000 °C for 1 h, and the BCC particles in the B2 matrix were dissolved when the heat treatment temperature was higher than 1000 °C. The hot-rolled alloy heat treated at 700 °C for 1 h had the highest yield strength, and the hot-rolled alloy treated at 1150 °C for 1 h showed the lowest yield strength. After a solution at 1150 °C for 1 h, aging at 700 °C for 4 h and 650 °C for 1 h, the L12 phase and BCC particles were precipitated in the FCC and B2 matrices, and B2 nanoprecipitates were observed around the FCC grain boundaries. The solution and double aging alloy exhibit the tensile strength of 1365.7 ± 9.5 MPa, a fracture elongation of 14.2 ± 1.5% at 20 °C, a tensile strength of 641.4 ± 6.0 MPa, and a fracture elongation of 16.9 ± 1.0% at 700 °C, showing great potential for application.

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