Achieving high strength-ductility synergy via layer-wise heterogeneous structure of additively manufactured reduced activation ferrite/martensite steel
The next generation of advanced fusion reactors requires high-performance reduced activation ferrite/martensite (RAFM) steel parts. Here, we propose a new process strategy to achieve high strength-ductility synergy of RAFM steel fabricated by laser powder bed fusion (LPBF). The key idea is to develo...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-05-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2025.2469632 |
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| Summary: | The next generation of advanced fusion reactors requires high-performance reduced activation ferrite/martensite (RAFM) steel parts. Here, we propose a new process strategy to achieve high strength-ductility synergy of RAFM steel fabricated by laser powder bed fusion (LPBF). The key idea is to develop a layer-wise heterogeneous structure (HS) by modulating the phase composition via periodic alternation of laser process parameters between different layers. The pronounced hetero-deformation induced (HDI) strengthening effect contributed to the enhanced strength and ductility of the LPBF-fabricated HS RAFM steel. Our findings offer a new avenue for future high-performance structural material development for LPBF. |
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| ISSN: | 2166-3831 |