Achieving high strength-ductility synergy via layer-wise heterogeneous structure of additively manufactured reduced activation ferrite/martensite steel

被引：0

作者：

Chen, Zhenyu ^{[1
]}

Zhuo, Yuhao ^{[1
]}

Cheng, Yuang ^{[1
]}

Song, Yu ^{[1
]}

Xia, Zhixin ^{[2
]}

Lu, Chengqi ^{[1
]}

Zhu, Xing ^{[3
]}

Wang, Chuanyang ^{[1
]}

Jia, Qingbo ^{[1
]}

机构：

[1] Soochow Univ, Sch Mech & Elect Engn, Suzhou, Peoples R China

[2] Soochow Univ, Shagang Sch Iron & Steel, Suzhou, Peoples R China

[3] Soochow Univ, Testing & Anal Ctr, Suzhou, Peoples R China

来源：

MATERIALS RESEARCH LETTERS | 2025年

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Reduced activation ferrite/martensite steel; laser powder bed fusion; heterogeneous structure; phase transformation; MECHANICAL-PROPERTIES; FERRITIC/MARTENSITIC STEEL; MICROSTRUCTURE STABILITY; RAFM STEEL; BEHAVIOR; TENSILE; FUSION; RULE; TI;

D O I：

10.1080/21663831.2025.2469632

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：9