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Advancing the mechanical performance of chemically complex alloys through strategically engineered bamboo-inspired multi-stage heterostructures

文献类型：期刊论文

作者Cui, Zhenlu5,6; Si, Dekun5,6; Zhang, Jilei5,6; Gao, Qingwei5,6; Gong, Jianhong5,6; Wang, Xiqiang5,6; Song, Kaikai5,6; Han, Xiaoliang5,6; Zhang K(张坤)7; Mu, Yongkun8
刊名COMPOSITES PART B-ENGINEERING
出版日期2025-08-01
卷号302页码:22
关键词Chemically complex alloys Heterogeneous microstructure Hierarchical precipitates Mechanical properties Strengthening mechanisms
ISSN号1359-8368
DOI10.1016/j.compositesb.2025.112547
通讯作者Song, Kaikai(songkaikai8297@gmail.com) ; Han, Xiaoliang(xiaolianghan@hotmail.com) ; Zhang, Kun(zhangkun@imech.ac.cn) ; Mu, Yongkun(yongkunmu@shu.edu.cn)
英文摘要Innovative design in heterostructure materials has emerged as a pivotal strategy to address the strength-ductility trade-off in metals and alloys. Inspired by the hierarchical structures found in bamboo, this study engineered a bamboo-like heterogeneous microstructure in a (FeCoNi)86Al7Ti7 chemically complex alloy (CCA) through a multi-step thermomechanical processing route. The bio-inspired triple heterostructures, featuring hierarchical grain sizes and multiscale, multi-morphology precipitates, significantly enhance the balance between strength and ductility, achieving nearly 2 GPa ultra-high tensile strength while maintaining good uniform plastic deformation. During deformation, L12 nanoprecipitates contribute to precipitation strengthening through the shear mechanism, while L21 submicron precipitates within the grains do so via the Orowan looping mechanism. L21 precipitates at the grain boundaries (GBs) act as reinforcement phases in the composite material. The bamboo-like heterostructure also alters dislocation accumulation by constraining deformation between coarse and ultrafine grains, influenced by the surrounding ultrafine grains and the diverse behaviors of precipitates. This pronounced back-stress strengthening across the matrix significantly enhances the strain-hardening capacity, thereby ensuring uniform plastic deformation. Overall, this novel approach demonstrates superior mechanical properties and offers a promising strategy for overcoming the strength-ductility trade-off in advanced alloys.
分类号一类
WOS关键词HIGH-ENTROPY ALLOY ; RANGE INTERNAL-STRESSES ; DYNAMIC RECRYSTALLIZATION ; TEXTURE EVOLUTION ; TWIP-STEEL ; STRENGTH ; DUCTILITY ; COLD ; DEFORMATION ; MICROSTRUCTURE
资助项目National Natural Science Foundation of China[52471138] ; National Natural Science Foundation of China[52401215] ; Natural Science Foundation of Shandong Province[ZR2023ME216] ; Opening project of the State Key Laboratory for Strength and Vibration of Mechanical Structures[2020YFA0710404]
WOS研究方向Engineering ; Materials Science
语种英语
WOS记录号WOS:001480962100001
资助机构National Natural Science Foundation of China ; Natural Science Foundation of Shandong Province ; Opening project of the State Key Laboratory for Strength and Vibration of Mechanical Structures
其他责任者Song, Kaikai，Han, Xiaoliang，张坤，Mu, Yongkun
源URL[http://dspace.imech.ac.cn/handle/311007/101166]  
专题力学研究所_国家微重力实验室
作者单位1.Univ Leoben, Dept Mat Sci, A-8700 Leoben, Austria
2.Edith Cowan Univ, Ctr Adv Mat & Mfg, Sch Engn, Joondalup, WA 6027, Australia;
3.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;
4.Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China;
5.Shandong Univ, Sch Mech Elect & Informat Engn, Weihai 264209, Peoples R China;
6.Shandong Univ, Future Ind Lab Higher Educ Inst Shandong Prov, Preparat & Applicat Aerosp High Performance Compos, Weihai 264209, Peoples R China;
7.Chinese Acad Sci, Inst Mech, CAS Key Lab Micrograv, Nat Micrograv Lab, Beijing 100190, Peoples R China;
8.Shanghai Univ, Inst Mat, Lab Microstruct, Shanghai 200444, Peoples R China;
9.Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria;
推荐引用方式
GB/T 7714		 Cui, Zhenlu,Si, Dekun,Zhang, Jilei,et al. Advancing the mechanical performance of chemically complex alloys through strategically engineered bamboo-inspired multi-stage heterostructures[J]. COMPOSITES PART B-ENGINEERING,2025,302:22.
APA Cui, Zhenlu.,Si, Dekun.,Zhang, Jilei.,Gao, Qingwei.,Gong, Jianhong.,...&Eckert, Juergen.(2025).Advancing the mechanical performance of chemically complex alloys through strategically engineered bamboo-inspired multi-stage heterostructures.COMPOSITES PART B-ENGINEERING,302,22.
MLA Cui, Zhenlu,et al."Advancing the mechanical performance of chemically complex alloys through strategically engineered bamboo-inspired multi-stage heterostructures".COMPOSITES PART B-ENGINEERING 302(2025):22.

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来源：力学研究所

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