Microstructural evolution in directionally solidified Ni-base superalloy IN792+Hf

S. M. Seo, I. S. Kim, J. H. Lee, C. Y. Jo, Hirofumi Miyahara, K. Ogi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Microstructural evolution during directional solidification (DS) of Ni-base superalloy IN792+Hf has been investigated with an emphasis on the γ′ precipitates and MC-type carbides. The quantitative image analyses revealed that the increase in the solidification rate up to 100 μm/s at constant thermal gradient of 178 K/cm resulted in a fine and uniform distribution of γ′ precipitates. The relationship between the as-cast γ′ size and cooling rate was also determined for DS IN792+Hf. In the mean time, the MC carbide size was found to be dependent both on the solidification rate and the S/L interface morphology while the area fraction of MC carbide was significantly influenced by the S/L interface morphology.

Original languageEnglish
Pages (from-to)110-114
Number of pages5
JournalJournal of Materials Science and Technology
Volume24
Issue number1
Publication statusPublished - Jan 1 2008

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Microstructural evolution
Superalloys
Solidification
Carbides
Precipitates
Thermal gradients
Cooling

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

Cite this

Microstructural evolution in directionally solidified Ni-base superalloy IN792+Hf. / Seo, S. M.; Kim, I. S.; Lee, J. H.; Jo, C. Y.; Miyahara, Hirofumi; Ogi, K.

In: Journal of Materials Science and Technology, Vol. 24, No. 1, 01.01.2008, p. 110-114.

Research output: Contribution to journalArticle

Seo, S. M. ; Kim, I. S. ; Lee, J. H. ; Jo, C. Y. ; Miyahara, Hirofumi ; Ogi, K. / Microstructural evolution in directionally solidified Ni-base superalloy IN792+Hf. In: Journal of Materials Science and Technology. 2008 ; Vol. 24, No. 1. pp. 110-114.
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