Additive manufacturing of martensitic stainless steel matrix composites with simultaneously enhanced strength-ductility and corrosion resistance

被引：47
作者：
Chen, Wei [1 ,2 ]
Xiao, Bo [3 ]
Xu, Lianyong [1 ,2 ]
Han, Yongdian [1 ,2 ]
Zhao, Lei [1 ,2 ]
Jing, Hongyang [1 ,2 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China
[2] Tianjin Key Lab Adv Joining Technol, Tianjin 300350, Peoples R China
[3] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China
来源：
COMPOSITES PART B-ENGINEERING | 2022年 / 234卷
基金：
中国国家自然科学基金;
关键词：
Directed energy deposition; Martensitic stainless steel; Metallic matrix composites; Strength-ductility trade-off; HIGH-ENTROPY ALLOYS; MICROSTRUCTURAL EVOLUTION; GRAIN-REFINEMENT; MECHANICAL-PROPERTIES; RAPID FABRICATION; HEAT-TREATMENT; LASER; NANOCOMPOSITES; BEHAVIOR; REINFORCEMENT;
D O I：
10.1016/j.compositesb.2022.109745
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Many traditional methods for strengthening martensitic stainless steel (SS) typically come at the sacrifice of ductility. Herein, we report a configuration design of ceramic particles for reinforcing additively manufactured 15-5 PH martensitic SS with an optimized combination of high-strength and impressively larger ductility via the micron-sized TiC addition. High strength is ascribed to grain refinement, Orowan bowing strengthening, and abundant nucleation of nanoscale (Nb,Ti)C precipitates, while high elongation correlates to the reduced oxide inclusion content, martensite/austenite duplex microstructure, and progressive transformation-induced plasticity effect. In addition, severe localized corrosion is completely inhibited. This work shows the great potential of additive manufacturing technology to fabricate Fe-based composites with unique microstructures, low residual stress levels, excellent corrosion resistance, and an exceptional combination of strength and ductility for practical applications.
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页数：13
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