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• W3115089459 endingPage "158565" @default.
• W3115089459 startingPage "158565" @default.
• W3115089459 abstract "• Appropriate Multi-Principal Element Alloys (MPEA) can exhibit superior corrosion and oxidation resistance. • High throughput experimentation can rapidly and cheaply find new high temperature structural alloys in the vast MPEA space. • Structural measurements show discovery of BCC MPEAs in AlFeNiTiVZrCr system. • Combination of X-ray diffraction and Raman scattering show that alloys with Cr> 24%, resist oxidation up to 873 K Multi-Principal Element Alloys (MPEA) have been hypothesized to maintain a stable single alloy phase and resist corrosion at high temperatures, which are desirable in various functional applications, including material of turbine blades. However, studies into oxidation resistant alloys have been constrained to individual MPEA systems or a limited selection of compositions within those systems. Here, High-Throughput Experimental (HTE) techniques were utilized to rapidly assess phase stability and resistance to oxidation of an (AlFeNiTiVZr) 1−x Cr x continuous composition spread (CCS) thin-film alloy system. High-throughput synchrotron diffraction and Raman spectroscopy were used to identify phases, especially high symmetry structures and oxides, as a function of annealing time and composition. The formation of two distinct phase regions, R 1 and R 2 , across the CCS was observed. One of these phase regions, R 2 , exhibited a stable high symmetry BCC-like phase at Cr concentrations greater than 25.4 at%, and grew a passivating mixed metal surface oxide; whereas, the R 1 phase region, decomposed on oxidation to multiple oxides and reacted with the substrate to form silicides. The passivating mixed metal oxide layer appears to prevent destabilization of the (AlFeNiTiVZr) 1−x Cr x MPEA BCC solid solution. At longer annealing times the passivating phase was seen only above 29.2 at% Cr. High Cr-doped (AlFeNiTiVZr) 1−x Cr x appear to be a good candidate for high temperature, oxidation-resistant structural alloys." @default.
• W3115089459 created "2021-01-05" @default.
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• W3115089459 date "2021-04-01" @default.
• W3115089459 modified "2023-10-16" @default.
• W3115089459 title "Phase stabilization and oxidation of a continuous composition spread multi-principal element (AlFeNiTiVZr)1−xCrx alloy" @default.
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• W3115089459 doi "https://doi.org/10.1016/j.jallcom.2020.158565" @default.
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