ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The elemental partitioning characteristics of advanced single crystal Ni-base superalloyscontaining additions of both Pt and Ru have been investigated using atom probe tomography.Detailed microanalysis revealed Ru additions partitioned preferentially to the disordered matrix,whereas Pt additions tended to partition to the ordered intermetallic γ′ precipitates. The partitioningcharacteristics of three nominally similar alloys with systematic variations in the levels of Cr, Ru andPt were investigated. For this particular set of experimental alloys, minor changes in the partitioningcharacteristics of the constituent elements could be attributed to additions of Cr and Ru. Thepreferential site occupancy of Pt within the L12 lattice was also statistically quantified withALCHEMI (atomic site location by channelling enhanced microanalysis). In contrast to the atomicpartitioning characteristics of Ru, Pt exhibited a tendency to occupy the Ni sublattice sites in the γ′structure
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1187.pdf
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