Periodically layered heterostructure enhances strength-ductility trade-off in an additive manufactured dual-phase medium-entropy ferrous alloy

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-04-07 DOI:10.1016/j.compositesb.2025.112494

Shengze Yang , Tiwen Lu , Yixiong Hu , Guangsheng Ma , Hongyu Chen , Zhiguo Li , Di Wang , Mina Zhang , Yang Liu , Yonggang Wang

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Abstract

The quest for materials that combine defect-free composition with a balance of strength and ductility remains a perennial topic in materials science. In this paper, we achieved a heterostructure composed of periodical and dual-phase layers via laser powder bed fusion of FeCoCrNiMn-xFe mixed powders. In comparison to single-phase materials, this periodically layered microstructure enables the alloy to achieve satisfactory strength-ductility balance with yield strength, ultimate tensile strength and elongation of 581 MPa, 757 MPa and 22.8 %, respectively. Finite element simulation and experimental characterization indicated that well-architectured layered heterostructure, featuring soft and hard domains, facilitates the accumulation of large stress gradient near the interface between hard and soft layers, which not only results in the presence of multi-type deformation substructure, e.g. deformation twins, stacking faults and phase transition, but also contributes to superior heterostructure deformation induced stress, thus facilitating the additional strain hardening. This work introduces a novel approach for the composition and microstructure design of heterogeneous materials with strength and ductility synergy.

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.