dc.contributor | NIST | en_US |
dc.contributor.author | Lass, Eric | |
dc.contributor.author | Maureen E. Williams | |
dc.contributor.author | Carelyn E. Campbell | |
dc.contributor.author | Kil-Won Moon | |
dc.contributor.author | Ursula R. Kattner | |
dc.contributor.other | eric.lass@nist.gov | en_US |
dc.date.accessioned | 2014-09-03T12:55:15Z | |
dc.date.available | 2014-09-03T12:55:15Z | |
dc.date.issued | 2014-09-03 | |
dc.identifier.citation | J. Phase Equilib. Diffus. (2014) 35: 711. | |
dc.identifier.uri | http://hdl.handle.net/11256/96 | |
dc.identifier.uri | http://dx.doi.org/10.1007/s11669-014-0346-2 | |
dc.description.abstract | Phase equilibria at 900 °C in the Co-rich Co-Al-W ternary system are investigated through isothermal annealing of six alloy compositions for times up to 8000 h. The volume fraction of the L12-γ′ phase co-existing with disordered FCC-γ, B2 and D019 phases is found to steadily decrease with increasing annealing time indicating that it is unstable at 900 °C. Additional heat treatments at 850 and 1000 °C further suggest it is a nonequilibrium phase at all temperatures in the ternary system. The L12-γ′ phase dissolves slowly with significant amounts remaining in some alloys after 8000 h at 900 °C. However, the present work clearly indicates the microstructure is moving toward a three-phase equilibrium between γ, D019, and B2. The collected compositional and phase equilibria information provide much needed data for improving the available thermodynamic assessments of the ternary Co-Al-W alloy system. | |
dc.rights | CC0 1.0 Universal | * |
dc.rights.uri | http://creativecommons.org/publicdomain/zero/1.0/ | * |
dc.subject | Co-based alloy | en_US |
dc.subject | phase equilibrium | en_US |
dc.subject | superalloy | en_US |
dc.subject | thermodynamics | en_US |
dc.title | Al-Co-W 900C Phase Equilibria Data | en_US |
dc.type | Dataset | en_US |
dc.type | Image | en_US |