Xu Yang, Gang Qin, Li Feng, Hao Ren, Yao Chen, Qi Wang, Ruirun Chen
{"title":"定向凝固发展高强高塑性高熵合金:一种多方面强化方法","authors":"Xu Yang, Gang Qin, Li Feng, Hao Ren, Yao Chen, Qi Wang, Ruirun Chen","doi":"10.1016/j.ijplas.2025.104403","DOIUrl":null,"url":null,"abstract":"<div><div>High-strength and high-ductility alloys are crucial for advanced engineering applications; however, achieving a balanced combination of these two properties remains a significant challenge. Here, we successfully developed an alloy with exceptional mechanical properties through microstructural design and processing optimization. By employing directional solidification, we fabricated an Al<sub>1.25</sub>CoCrFeNi<sub>2.8</sub>Mo<sub>0.2</sub> dual-phase high-entropy alloy (HEA) that exhibits a distinctive microstructure, which significantly enhances both strength and ductility. The alloy demonstrates superior mechanical performance, with a yield strength of 505 MPa, ultimate tensile strength of 1166 MPa, and uniform elongation of 19 %. Compared with the conventional as-cast HEA, the elongation is increased by 46 %, and the tensile strength is increased by 5 %. The enhanced properties are attributed to a synergistic combination of solid solution strengthening, phase interface strengthening, and precipitation hardening mechanisms. Detailed microstructural analysis reveals that hierarchical stacking fault networks in the face-centered cubic phase facilitate enhanced work hardening. Concurrently, B2-ordered nanoparticles acted as potent obstacles to dislocation motion, resulting in a significant enhancement of the strength. Additionally, the unidirectional lamellar microstructure improves fracture toughness by inhibiting crack propagation. This study underscores the potential of combining advanced metallurgical design with processing techniques to produce high-strength, ductile metallic materials.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"191 ","pages":"Article 104403"},"PeriodicalIF":9.4000,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Development of high-strength and high-ductility high-entropy alloys via directional solidification: A multifaceted strengthening approach\",\"authors\":\"Xu Yang, Gang Qin, Li Feng, Hao Ren, Yao Chen, Qi Wang, Ruirun Chen\",\"doi\":\"10.1016/j.ijplas.2025.104403\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>High-strength and high-ductility alloys are crucial for advanced engineering applications; however, achieving a balanced combination of these two properties remains a significant challenge. Here, we successfully developed an alloy with exceptional mechanical properties through microstructural design and processing optimization. By employing directional solidification, we fabricated an Al<sub>1.25</sub>CoCrFeNi<sub>2.8</sub>Mo<sub>0.2</sub> dual-phase high-entropy alloy (HEA) that exhibits a distinctive microstructure, which significantly enhances both strength and ductility. The alloy demonstrates superior mechanical performance, with a yield strength of 505 MPa, ultimate tensile strength of 1166 MPa, and uniform elongation of 19 %. Compared with the conventional as-cast HEA, the elongation is increased by 46 %, and the tensile strength is increased by 5 %. The enhanced properties are attributed to a synergistic combination of solid solution strengthening, phase interface strengthening, and precipitation hardening mechanisms. Detailed microstructural analysis reveals that hierarchical stacking fault networks in the face-centered cubic phase facilitate enhanced work hardening. Concurrently, B2-ordered nanoparticles acted as potent obstacles to dislocation motion, resulting in a significant enhancement of the strength. Additionally, the unidirectional lamellar microstructure improves fracture toughness by inhibiting crack propagation. This study underscores the potential of combining advanced metallurgical design with processing techniques to produce high-strength, ductile metallic materials.</div></div>\",\"PeriodicalId\":340,\"journal\":{\"name\":\"International Journal of Plasticity\",\"volume\":\"191 \",\"pages\":\"Article 104403\"},\"PeriodicalIF\":9.4000,\"publicationDate\":\"2025-06-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Plasticity\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0749641925001627\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Plasticity","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0749641925001627","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Development of high-strength and high-ductility high-entropy alloys via directional solidification: A multifaceted strengthening approach
High-strength and high-ductility alloys are crucial for advanced engineering applications; however, achieving a balanced combination of these two properties remains a significant challenge. Here, we successfully developed an alloy with exceptional mechanical properties through microstructural design and processing optimization. By employing directional solidification, we fabricated an Al1.25CoCrFeNi2.8Mo0.2 dual-phase high-entropy alloy (HEA) that exhibits a distinctive microstructure, which significantly enhances both strength and ductility. The alloy demonstrates superior mechanical performance, with a yield strength of 505 MPa, ultimate tensile strength of 1166 MPa, and uniform elongation of 19 %. Compared with the conventional as-cast HEA, the elongation is increased by 46 %, and the tensile strength is increased by 5 %. The enhanced properties are attributed to a synergistic combination of solid solution strengthening, phase interface strengthening, and precipitation hardening mechanisms. Detailed microstructural analysis reveals that hierarchical stacking fault networks in the face-centered cubic phase facilitate enhanced work hardening. Concurrently, B2-ordered nanoparticles acted as potent obstacles to dislocation motion, resulting in a significant enhancement of the strength. Additionally, the unidirectional lamellar microstructure improves fracture toughness by inhibiting crack propagation. This study underscores the potential of combining advanced metallurgical design with processing techniques to produce high-strength, ductile metallic materials.
期刊介绍:
International Journal of Plasticity aims to present original research encompassing all facets of plastic deformation, damage, and fracture behavior in both isotropic and anisotropic solids. This includes exploring the thermodynamics of plasticity and fracture, continuum theory, and macroscopic as well as microscopic phenomena.
Topics of interest span the plastic behavior of single crystals and polycrystalline metals, ceramics, rocks, soils, composites, nanocrystalline and microelectronics materials, shape memory alloys, ferroelectric ceramics, thin films, and polymers. Additionally, the journal covers plasticity aspects of failure and fracture mechanics. Contributions involving significant experimental, numerical, or theoretical advancements that enhance the understanding of the plastic behavior of solids are particularly valued. Papers addressing the modeling of finite nonlinear elastic deformation, bearing similarities to the modeling of plastic deformation, are also welcomed.