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|Author(s):||Eric Lass; Kil-Won Moon; Maureen E. Williams; Carelyn E. Campbell; Ursula R. Kattner; David C. Dunand; Peter J. Bocchini; David N. Seidman;|
|Title:||Atom-Probe Tomographic Study of ¿/¿' Interfaces and Compositions in an Aged Co-Al-W Superalloy|
|Published:||December 12, 2012|
|Abstract:||Atom-probe tomography (APT) is utilized to investigate, in a Co-9.7Al-10.8W at.% alloy aged at 900 °C for ~1000 h, the phase composition and partitioning behavior of the two-phase ɣ(f.c.c.)/ɣ'(L12) microstructure. The APT composition of the ɣ-matrix (Co-8.97Al-5.69W at.%) agrees well with a previously reported measurement made by energy-dispersive X-ray spectroscopy; however, the composition of the ɣ'(L12) precipitates (Co-10.03Al-12.48W at.%) is slightly richer in W and Al, and leaner in Co. Partitioning coefficients and Al interfacial excess have also been calculated.|
|Keywords:||¿/¿' Co-based superalloys, Atom-probe tomography, Co-Al-W|
|Research Areas:||Thermodynamics and kinetics, Advanced Materials|
|DOI:||http://dx.doi.org/10.1016/j.scriptamat.2012.11.035 (Note: May link to a non-U.S. Government webpage)|