Metallurgical and Materials Transactions A

, Volume 40, Issue 2, pp 269–272 | Cite as

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

  • N. TsunoEmail author
  • K. Kakehi
  • C.M.F. Rae
  • R. Hashizume


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.


Creep Rate Stack Fault Energy Creep Strength Matrix Channel Vertical Channel 
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This research was partially supported by a Ministry of Education, Science, Sports and Culture Grant-in-Aid for Scientific Research (C), 19560706, 2007. The authors gratefully acknowledge Hitachi, Ltd. for the provision of materials.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2008

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringTokyo Metropolitan UniversityTokyoJapan
  2. 2.Department of Materials Science and MetallurgyUniversity of CambridgeCambridgeUnited Kingdom
  3. 3.Power Engineering R&D Center, The Kansai Electric Power Company IncAmagasakiJapan

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