| Issue |
J. Phys. Colloques
Volume 49, Number C6, Novembre 1988
35th International Field Emission Symposium / 35éme Symposium International d'Emission de Champ
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| Page(s) | C6-391 - C6-396 | |
| DOI | https://doi.org/10.1051/jphyscol:1988667 | |
35th International Field Emission Symposium / 35éme Symposium International d'Emission de Champ
J. Phys. Colloques 49 (1988) C6-391-C6-396
DOI: 10.1051/jphyscol:1988667
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
J. Phys. Colloques 49 (1988) C6-391-C6-396
DOI: 10.1051/jphyscol:1988667
MICROSTRUCTURAL CHARACTERIZATION OF UDIMET 720 : A NICKEL-BASE ALLOY
K.L. MORE et M.K. MILLERMetals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
Abstract
The microstructure and chemical composition of Udimet 720*, a nickel-base superalloy, has been characterized with a variety of techniques including atom probe field-ion microscopy (APFIM), analytical electron microscopy (AEM), and secondary ion mass spectroscopy (SIMS). It was determined that the microstructure of the alloy consists of a γ matrix with completely coherent γ precipitates. Large carbide particles form at the grain and twin boundaries as a result of the standard four-step heat treatment. There appears to be some segregation of boron and carbon to γ/γ interfaces. There is also a significant segregation of boron to the grain and twin boundaries.