Fabricating 9–12 Cr ferritic/martensitic steels using selective electron beam melting

Tack Lee, Huakang Bian, Kenta Aoyagi, Haruki Ohnishi, Takehisa Hino, Yujiro Nakatani, Akihiko Chiba

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

9–12 Cr ferritic/martensitic steel is successfully fabricated using selective electron beam melting (SEBM). The microstructure of as-built components is compared to the ones fabricated by a conventional method, and it is revealed that the SEBM-built components have tempered martensite structure with fine equiaxed prior austenite grains (60.1 ± 8.3 μm) containing thin layers covered by W-rich phases and large fraction (20% over) of sub-blocks corresponding to K-S orientation relationships due to characteristics of SEBM as a rapid solidification process. The SEBM provides a new production method to fabricate heat-resistant components of 9–12 Cr ferritic/martensitic steels with unique microstructure.

Original languageEnglish
Article number127747
JournalMaterials Letters
Volume271
DOIs
Publication statusPublished - 2020 Jul 15

Keywords

  • 9–12 Cr ferritic/martensitic steels
  • Electron beam melting
  • Metals and alloys
  • Microstrucutre

ASJC Scopus subject areas

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

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