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

doi:10.1016/j.matlet.2020.127747

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

Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-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 language	English
Article number	127747
Journal	Materials Letters
Volume	271
DOIs	https://doi.org/10.1016/j.matlet.2020.127747
Publication status	Published - 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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title = "Fabricating 9–12 Cr ferritic/martensitic steels using selective electron beam melting",

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.",

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author = "Tack Lee and Huakang Bian and Kenta Aoyagi and Haruki Ohnishi and Takehisa Hino and Yujiro Nakatani and Akihiko Chiba",

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T1 - Fabricating 9–12 Cr ferritic/martensitic steels using selective electron beam melting

AU - Lee, Tack

AU - Bian, Huakang

AU - Aoyagi, Kenta

AU - Ohnishi, Haruki

AU - Hino, Takehisa

AU - Nakatani, Yujiro

AU - Chiba, Akihiko

PY - 2020/7/15

Y1 - 2020/7/15

N2 - 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.

AB - 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.

KW - 9–12 Cr ferritic/martensitic steels

KW - Electron beam melting

KW - Metals and alloys

KW - Microstrucutre

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

Abstract

Keywords

ASJC Scopus subject areas

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