| Autor: |
BOETTINGER, W.J., NEWBURY, D.E., RITCHIE, N.W.M., WILLIAMS, M.E., KATTNER, U.R., LASS, E.A., MOON, K.-W., KATZ, M.B., PEREPEZKO, J.H. |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Metall Mater Trans A Phys Metall Mater Sci |
| ISSN: |
1543-1940 |
| Popis: |
Differential thermal analysis (DTA) and microstructural and microprobe measurements of DTA and as-cast Ni-Re alloys with compositions between 0.20 and 0.44 mass fraction Re provide information to resolve differences in previously published Ni-Re phase diagrams. This investigation determines that the peritectic invariant between liquid, Re-rich hexagonal close packed and Ni-rich face center cubic phases, L + HCP → FCC, occurs at 1561.1 °C ± 3.4 °C (1σ) with compositions of liquid, FCC and HCP phases of 0.283 ± 0.036, 0.436 ± 0.026, and 0.828 ± 0.037 mass fraction Re, respectively. Analysis of the microsegregation in FCC alloys yields a partition coefficient for solidification, k = 1.54 ± 0.09 (mass frac./mass frac.). A small deviation from Scheil behavior due to dendrite tip kinetics is documented in as-cast samples. No evidence of an intermetallic phase is observed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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