Architecture of high-strength aluminum-matrix composites processed by a novel microcasting technique

doi:10.1038/s41427-019-0174-2

CORC > 金属研究所 > 中国科学院金属研究所

	Architecture of high-strength aluminum-matrix composites processed by a novel microcasting technique
	Shao, Chenwei 2; Zhao, Shuo 1; Wang, Xuegang 2; Zhu, Yankun 2; Zhang, Zhefeng 2; Ritchie, Robert O.3
刊名	NPG ASIA MATERIALS
	2019-11-29
卷号	11 页码:12
ISSN号	1884-4049
DOI	10.1038/s41427-019-0174-2
通讯作者	Zhao, Shuo(szhao14b@alum.imr.ac.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn)
英文摘要	As important lightweight structural materials, cast aluminum alloys have been largely used in the transportation and aerospace industries. In general, Al-Si-based alloys comprise more than 90% of all castings due to their excellent castability and corrosion resistance. However, even though various reinforcements have been introduced, the strength of these alloys is not that high, which severely limits their use for certain high-performance applications. Here, we report on a new strategy and technology to reinforce Al-Si alloys to increase their yield strength into the similar to 400-660 MPa range, a level that is 29-1 13% higher than that of all current cast Al-Si alloys, laboratory or commercial, and comparable to that of many high-strength steels but with -40% lower density. By introducing continuous Ti-6Al-4V reinforcements into the Al-Si matrix through a novel microcasting process, the yield strength of the resulting alloy can be enhanced to between 4 and 6 times higher than that of the pure Al-Si alloy. The extraordinary reinforcing effect originates from the occurrence of multiscale strengthening mechanisms, including macroscale compound strengthening (the rule of mixtures amended by crack arrest mechanism), mesoscale strain-gradient strengthening, and microscale interface-affected-zone and nanoparticle strengthening. The core principle of our material design is to make all components of the composite fully participate in plastic (compatible) deformation, and thus, continuous reinforcements, instead of discrete reinforced structures (e.g., particles, whiskers, and short fibers), were introduced into the Al-Si alloy. Combined with 3-D printing technology, the present microcasting process can realize strengthening at the designed position by architecting specific reinforcements in the matrix.
资助项目	National Natural Science Foundation of China (NSFC)[51501198] ; National Natural Science Foundation of China (NSFC)[51771208] ; National Natural Science Foundation of China (NSFC)[51801216] ; Open Foundation of Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process[SHSYS201803] ; Natural Science Foundation of Liaoning Province[20180540142] ; IMR SYNL-T.S. Ke Research Fellowship
WOS研究方向	Materials Science
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000502983500002
资助机构	National Natural Science Foundation of China (NSFC) ; Open Foundation of Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process ; Natural Science Foundation of Liaoning Province ; IMR SYNL-T.S. Ke Research Fellowship
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136299]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhao, Shuo; Zhang, Zhefeng
作者单位	1.Shenyang Aerosp Univ, Key Lab Fundamental Sci Natl Def Aeronaut Digital, Shenyang 110136, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Liaoning, Peoples R China 3.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
推荐引用方式 GB/T 7714	Shao, Chenwei,Zhao, Shuo,Wang, Xuegang,et al. Architecture of high-strength aluminum-matrix composites processed by a novel microcasting technique[J]. NPG ASIA MATERIALS,2019,11:12.
APA	Shao, Chenwei,Zhao, Shuo,Wang, Xuegang,Zhu, Yankun,Zhang, Zhefeng,&Ritchie, Robert O..(2019).Architecture of high-strength aluminum-matrix composites processed by a novel microcasting technique.NPG ASIA MATERIALS,11,12.
MLA	Shao, Chenwei,et al."Architecture of high-strength aluminum-matrix composites processed by a novel microcasting technique".NPG ASIA MATERIALS 11(2019):12.