. . "Co-Re-based alloys have been developed to supplement the Ni-base superalloys used in gas turbine applications at high temperatures (1473 K [1200 A degrees C] bare metal temperature). Unlike other commercial Co-based alloys, the Co matrix in the Co-Re alloys has a stable hexagonal close-packed (hcp) structure at room temperature. In situ neutron diffraction measurements on experimental Co-Re alloys hardened by carbide precipitates showed that the matrix undergoes an hcp a double dagger dagger face-centered cubic (fcc) allotropic transformation after heating to high temperatures. Furthermore, it was found that this transformation has a large hysteresis (similar to 100 K). Thermodynamic calculations were undertaken to study the high-temperature phase stability and transformations in the complex multicomponent, multiphase Co-Re-Cr-C system with or without the addition of Ta. The results show that the minor phases (Cr23C6-type carbides and the Cr2Re3-type sigma phase) play an important role in the hcp a double dagger dagger fcc hysteresis by influencing the partitioning of Cr and Re between the matrix and the other phases."@en . "Strunz, Pavel" . . "7"^^ . "Piegert, S." . "Gilles, R." . "Co-Re-based alloys have been developed to supplement the Ni-base superalloys used in gas turbine applications at high temperatures (1473 K [1200 A degrees C] bare metal temperature). Unlike other commercial Co-based alloys, the Co matrix in the Co-Re alloys has a stable hexagonal close-packed (hcp) structure at room temperature. In situ neutron diffraction measurements on experimental Co-Re alloys hardened by carbide precipitates showed that the matrix undergoes an hcp a double dagger dagger face-centered cubic (fcc) allotropic transformation after heating to high temperatures. Furthermore, it was found that this transformation has a large hysteresis (similar to 100 K). Thermodynamic calculations were undertaken to study the high-temperature phase stability and transformations in the complex multicomponent, multiphase Co-Re-Cr-C system with or without the addition of Ta. The results show that the minor phases (Cr23C6-type carbides and the Cr2Re3-type sigma phase) play an important role in the hcp a double dagger dagger fcc hysteresis by influencing the partitioning of Cr and Re between the matrix and the other phases." . . "Holzel, M." . . . . "RIV/61389005:_____/12:00384686" . . "Mukherji, D." . "The Hexagonal Close-Packed (HCP) a double dagger dagger Face-Centered Cubic (FCC) Transition in Co-Re-Based Experimental Alloys Investigated by Neutron Scattering"@en . "Metallurgical and Materials Transactions A" . . . . . "000303457000012" . . "The Hexagonal Close-Packed (HCP) a double dagger dagger Face-Centered Cubic (FCC) Transition in Co-Re-Based Experimental Alloys Investigated by Neutron Scattering" . . "6" . "Co-base alloy; neutron diffraction; electron microscopy"@en . "The Hexagonal Close-Packed (HCP) a double dagger dagger Face-Centered Cubic (FCC) Transition in Co-Re-Based Experimental Alloys Investigated by Neutron Scattering"@en . "11"^^ . . "43A" . . "R\u00F6sler, J." . "The Hexagonal Close-Packed (HCP) a double dagger dagger Face-Centered Cubic (FCC) Transition in Co-Re-Based Experimental Alloys Investigated by Neutron Scattering" . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . "RIV/61389005:_____/12:00384686!RIV13-AV0-61389005" . . "[1FAA48AB2651]" . "10.1007/s11661-011-1058-4" . "Hofmann, M." . "138889" . "P(FR-TI1/378), Z(AV0Z10480505)" . "1"^^ . "1073-5623" .