Microstructural stability of a single crystal superalloy DD8 during thermal exposure

K. Y. Cheng, D. H. Kim, Y. S. Yoo, C. Y. Jo, T. Jin, Z. Q. Hu

Research output: Contribution to journalArticlepeer-review


Microstructural stability of a nickel base single crystal alloy DD8 has been investigated. Standard heat treated specimen showed good microstructural stability at 950°C. While under the as-cast condition, a kind of rod-like phase precipitated in the interdendritic region of as-cast specimen during thermal exposure. The phase, which has bcc structure, was enriched with Cr. Thermo-calc also predicted precipitation of a bcc phase at around 950°C. The Cr-rich bcc phase was considered as α-Cr and formed due to the segregation of Cr under the as-cast condition.

Original languageEnglish
Pages (from-to)127-130
Number of pages4
JournalJournal of Materials Science and Technology
Issue number1
Publication statusPublished - 2008 Jan

All Science Journal Classification (ASJC) codes

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


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