Balancing mechanical properties in tungsten-alumina oxide alloys via coherent/semi-coherent interfaces

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-01-31 DOI:10.1016/j.compositesb.2025.112204

Fengsong Fan , Jie Wang , Haifeng Xu , Sijia Liu , Huihuang Song , Qiang Chen , Haoyang Wu , Gang Chen , Baorui Jia , Xuanhui Qu , Mingli Qin

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引用次数: 0

Abstract

The trade-off between strength and toughness has always presented a challenging issue in the development of high-performance metallic structural materials. Introducing hard, non-deforming particles in W metal can effectively enhance strength; however, the severe stress concentration at heterogeneous phasal interfaces often cause strain incompatibility, thereby deteriorating toughness. Here, we constructed robust coherent/semi-coherent W/Al₂O₃ interfaces to achieve a balance between strength and deformability of W/Al₂O₃ materials. Under 15 % compression deformation, our material exhibits a strength exceeding 2200 MPa and an impressive hardness of HV_0.2 = 637.4, among the best sintered dispersion-strengthened W alloys reported. The strong coherent/semi-coherent interfaces between W and Al₂O₃, as confirmed by TEM observations and DFT calculations, effectively hinder crack propagation along the phase boundaries, and instead, the cracks tear the Al₂O₃ particles dispersed at the W grain boundaries, considered responsible for the high ductility. This study provides new insights into the synergistic strengthening of dispersion-strengthened W alloys.

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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.