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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… Click to show full abstract
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.
Journal Title: Materials Letters
Year Published: 2020
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