A high stability B2-containing refractory multi-principal element alloy

Materials design for hypersonics

“…Nose and wing leading edges that are subjected to intense heat loading may employ heat pipes or actively cooled structures for thermal regulation 12,30 . By contrast, acreage locations -large fuselage regions on the vehile -experience lower heat fluxes and have historically been passively cooled using materials with low thermal conductivities and thermal expansion coefficients (Box 1).…”

“…This provides opportunities for the design of advanced cooling methodologies such as active TPS [67][68][69][70] . These emerging manufacturing techniques can also be combined with high-throughput characterization and machine learning algorithms to rapidly discover and develop the next-general refractory alloys for hypersonics 30,66,71 .…”

First-principles study of stability and electronic properties of B2 X–Ru alloys for high-temperature structural applications

“…In this study we report on the properties of B2 X-Ru (X = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn) alloys. Although data on these material systems in the B2 Phase is limited in literature, previous studies have shown that the two-phase BCC + B2 microstructure possesses microstructural similarities to ' g g -Ni-based superalloys [25][26][27][28][29][30][31][32][33]. Moreover, a comprehensive investigation by Chauhan et al [34] into the properties of nitrides of transition metals (TMs) belonging to the 4B group (TiN, ZrN, and HfN) in both the initial NaCl-B1 and the high-pressure CsCl-B2 phases indicates that these materials maintain mechanical stability in the both the B1 and B2 phase under standard conditions and elevated pressures conducted.…”

“…Although data on these material systems in the B2 phase is limited in the literature, previous studies have shown that the two-phase BCC + B2 microstructure possesses microstructural similarities to gÀg 0 Ni-based super-alloys. [25][26][27][28][29][30][31][32][33] Moreover, a comprehensive investigation by Chauhan et al 34 into the properties of nitrides of transition metals (TMs) belonging to the 4B group (TiN, ZrN, and HfN) in both the initial NaCl-B1 and the high-pressure CsCl-B2 phases indicates that these materials maintain mechanical stability in both the B1 and B2 phases under standard conditions and elevated pressures. In the current study, we specifically study the thermodynamic, mechanical and dynamical stabilities as well as the electronic properties of B2 X-Ru (X = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn) alloys under zero-pressure conditions.…”

Short-range-order degree dominated physical and mechanical properties of refractory multi-principal element alloys: a first-principles study

“…The refractory multi-principal element alloys (RMPEAs) have many advantages over traditional alloys [1], such as high strength and stability at high temperatures [2][3][4][5][6], which can be utilized to gas turbine engines in the aerospace industry [7][8][9][10][11]. In the past years, multi-principal element alloys (MPEAs) are traditionally assumed to be random solid solutions [12].…”