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- W4309771978 abstract "Co-Cr-based alloys are known for their superior high-temperature wear and corrosion resistance but they all show complex chemistries (such as Co‐31Cr‐12.5W‐0.5Mo‐1.5Fe‐1.5Ni‐1Si‐0.5Mn for popular Stellite 1). The present work addresses the composition origin of these alloys using our cluster formula approach. Theoretically, the chemical unit of hexagonal close-packed structure with atoms of similar atomic radii is composed of a nearest-neighbor twinned-cuboctahedral cluster of thirteen atoms plus three next-neighbor glue atoms. To validate this 16-atom unit for Co-Cr, the Co56Cr44 eutectic is first interpreted via combining the chemical formulas of Co3Cr (Ni3Sn ordered structure based on hexagonal close-packed structure) and σ-CoCr (ordered from BCC solid solution): [Co-Cr4Co8]Co2-xCr1+x + [Co-Cr8Co6]Co1+xCr2-x = [Co-Cr4Co8 +Co-Cr8Co6]Co3Cr3 = Co19Cr15 ≈ Co55.9Cr44.1. It is found that Co-Cr-based industrial alloys satisfy the formula [Co¯-Cr¯4Co¯8]Co¯2-xCr¯1+x, with x = 0 ∼ 2.5, where Co¯ and Cr¯ represent atoms similar to Co and Cr, respectively, as exemplified by Stellite 1 formulated by [Co¯-Cr¯4Co¯8]Cr¯3, and Haynes 25 and MP35N by [Co¯-Cr¯4Co¯8]Co¯2Cr¯1. Using a known eutectic point to validate the existence of cluster formulas constitutes a straightforward way to understanding the compositions of industrial alloys." @default.
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- W4309771978 date "2023-03-01" @default.
- W4309771978 modified "2023-10-01" @default.
- W4309771978 title "Composition interpretation of Co-Cr industrial alloys using cluster formula approach" @default.
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- W4309771978 doi "https://doi.org/10.1016/j.mtcomm.2022.104922" @default.
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