Effect of Ruthenium on Creep Strength of Ni-Base Single-Crystal Superalloys at 750 °C and 750 MPa

The effect of Ru on the creep behavior of two kinds of single-crystal Ni-base superalloys was studied at 750 °C and 750 MPa to discern the benefit of Ru as a strengthening element. The addition of Ru decreased the primary creep strain and improved the creep strength. Further, the addition of Ru enha...

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Veröffentlicht in:	Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2009-02, Vol.40 (2), p.269-272
Hauptverfasser:	Tsuno, N., Kakehi, K., Rae, C.M.F., Hashizume, R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Applied sciences Characterization and Evaluation of Materials Chemistry and Materials Science Communication Creep Creep tests Exact sciences and technology Materials Science Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metallic Materials Metallurgy Metals. Metallurgy Nanotechnology Solid solutions Structural Materials Surfaces and Interfaces Thin Films
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Zusammenfassung:	The effect of Ru on the creep behavior of two kinds of single-crystal Ni-base superalloys was studied at 750 °C and 750 MPa to discern the benefit of Ru as a strengthening element. The addition of Ru decreased the primary creep strain and improved the creep strength. Further, the addition of Ru enhanced the dissociation of dislocations in the matrix channels. This inhibited the nucleation of the stacking fault ribbons and, as a result, impeded the operation of {111}〈112〉 slip.
ISSN:	1073-5623 1543-1940
DOI:	10.1007/s11661-008-9744-6