Anisotropic creep behavior of aluminized Ni-based single crystal superalloy TMS-75

Fahamsyah H. Latief, Koji Kakehi, Hideyuki Murakami

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We examined the creep behavior of aluminized Ni-based single crystal superalloy TMS-75 with {100} and {110} side-surfaces. The specimens were aluminized by pack aluminizing treatment at 1000°C for 5. h under argon flow. The creep rupture tests were performed at 900°C under a stress of 392. MPa. The stress orientation of all of the specimens was within 4° of 〈001〉. It was evident that the {100} specimens exhibited higher creep rupture lives compared to the {110} specimens, indicating that anisotropy of the secondary orientation-which is normal in the primary orientation-occurred. The anisotropic creep behavior of the aluminized specimens was induced primarily by the different arrangements of {111} 〈101〉 slip systems between the two side-surface orientations. The gradient of hardness values in the coating-to-substrate regions and depth of TCP penetration were additional degradation factors.

Original languageEnglish
Pages (from-to)65-71
Number of pages7
JournalMaterials Science and Engineering A
Volume567
DOIs
Publication statusPublished - 2013 Feb 4
Externally publishedYes

Keywords

  • Aluminide coating
  • Creep behavior
  • Crystallographic orientation
  • Microstructure
  • Ni-based superalloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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