TY - JOUR
T1 - The microstructure and mechanical properties of selective electron beam melting manufactured 9–12Cr ferritic/martensitic steel using N- and Ar-atomized powder
AU - Lee, Tack
AU - Aoyagi, Kenta
AU - Bian, Huakang
AU - Yamanaka, Kenta
AU - Sato, Shigeo
AU - Chiba, Akihiko
N1 - Funding Information:
This work was partly supported by Toshiba Energy Systems and Solutions Corporation . We acknowledge Dr. Yujiro Nakatani, Dr. Takehisa Hino, and Dr. Haruki Ohnishi of Toshiba Energy Systems & Solutions Corporation. This work was also partly supported by a Grant-in-Aid for Scientific Research (KAKENHI, grant number 18H03834 ) from the Japan Society for the Promotion of Science, and a cooperative program (Proposal No. 18G0418 and 19G0411 ) of the Cooperative Research and Development Center for Advanced Materials, Institute for Materials Research (CRDAM-IMR), Tohoku University.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/9
Y1 - 2021/9
N2 - Low-carbon 9-12Cr heat-resistant ferritic/martensitic steels were fabricated by SEBM using two types of powders (Ar gas- and N gas-atomized powders). Both the as-built Ar- and N-components showed a tempered and fine lath-like ferritic/martensitic microstructure, high tensile strength (approximately 1300 and 1167 MPa for the as-built N-component and the as-built Ar-component, respectively), and tensile elongation of approximately 8%. The high N content (0.44 wt%) of the as-built N-component resulted in a refined lath martensite phase and promoted the precipitation of a fine M2X phase which give rise to higher strength. SEBM is a suitable and rapid method for fabricating low-C martensite steels with a fine lath martensitic microstructure and enhanced mechanical properties for use in power plants without employing welding.
AB - Low-carbon 9-12Cr heat-resistant ferritic/martensitic steels were fabricated by SEBM using two types of powders (Ar gas- and N gas-atomized powders). Both the as-built Ar- and N-components showed a tempered and fine lath-like ferritic/martensitic microstructure, high tensile strength (approximately 1300 and 1167 MPa for the as-built N-component and the as-built Ar-component, respectively), and tensile elongation of approximately 8%. The high N content (0.44 wt%) of the as-built N-component resulted in a refined lath martensite phase and promoted the precipitation of a fine M2X phase which give rise to higher strength. SEBM is a suitable and rapid method for fabricating low-C martensite steels with a fine lath martensitic microstructure and enhanced mechanical properties for use in power plants without employing welding.
KW - Additive manufacturing
KW - Electron beam melting
KW - Ferritic/martensitic steel
UR - http://www.scopus.com/inward/record.url?scp=85107763837&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85107763837&partnerID=8YFLogxK
U2 - 10.1016/j.addma.2021.102075
DO - 10.1016/j.addma.2021.102075
M3 - Article
AN - SCOPUS:85107763837
SN - 2214-8604
VL - 45
JO - Additive Manufacturing
JF - Additive Manufacturing
M1 - 102075
ER -