Amouyal Yaron author Mao Zugang author Seidman David N. author 2009 Atom-probe tomography (APT) and first-principles calculations are employed to investigate the partitioning of Hf in the gamma[prime](L12)/gamma(fcc) phases in two multicomponent Ni-based superalloys. APT results indicate strong partitioning of Hf atoms to the gamma(fcc)-phase. We perform first-principles calculations of the substitutional formation energy of Hf for a model gamma(Ni)/gamma[prime](Ni3Al) system indicating Hf partitioning to the gamma[prime]-phase. Additional calculations of the Hf–Cr binding energy suggest, however, that Cr atoms, which partition to the gamma-phase, have a strong attractive binding energy with Hf atoms, thus predicting a reversal of the Hf partitioning in favor of the gamma-phase due to alloying with Cr. ab initio calculations aluminium alloys atom probe field ion microscopy binding energy hafnium alloys nickel alloys phase diagrams superalloys tomography exported from refbase (http://arc.nucapt.northwestern.edu/refbase/show.php?record=10700), last updated on Mon, 26 Oct 2009 17:18:40 -0500 text http://link.aip.org/link/?APL/95/161909/1 http://arc.nucapt.northwestern.edu/refbase/files/Amouyal-2009_10700.pdf http://link.aip.org/link/?APL/95/161909/1 10.1063/1.3248146 Amouyal-2009 NU @ m-krug @ amouyal:161909 2009 Aip continuing periodical academic journal 95 16 161909