DOIAbstract
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
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