Overcoming the strength-ductility trade-off of an aluminum matrix composite by novel core-shell structured reinforcing particulates

doi:10.1016/j.compositesb.2020.108541

IMR OpenIR

	Overcoming the strength-ductility trade-off of an aluminum matrix composite by novel core-shell structured reinforcing particulates
	Zhang, Xuezheng 1,2; Chen, Tijun 1; Ma, Siming 2; Qin, He 1; Ma, Jinyuan 3
通讯作者	Chen, Tijun(chentj@lut.cn)
	2021-02-01
发表期刊	COMPOSITES PART B-ENGINEERING
ISSN	1359-8368
卷号	206 页码:15
摘要	The trade-off between strength and ductility of particulate reinforced metal matrix composites (PRMMCs) has been a longstanding puzzle. Here we propose an effective strategy to surmount the inverse relationship between strength and ductility of an A356 Al alloy based PRMMC by in situ synthesizing novel reinforcing particulates with a special core-shell (CS) structure. Such structure features a Ti core inside a dual-layer shell: the inner layer has a nano-grained (similar to 130 nm) heterogeneous structure, and the outer layer possesses a composite structure composed of a (Al,Si)(3)Ti substrate with dense dispersion of nanoparticles. As a result, the obtained composite reinforced with such CS reinforcing particulates (CS composite) achieves an unprecedented tensile elongation to failure of 8.3 +/- 0.8% and a uniform elongation of 7.1 +/- 0.6%, which nearly triples that of the same alloy based composite reinforced with monolithic (Al,Si)(3)Ti particulates (monolithic composite) and equivalent to corresponding matrix alloy while maintaining high ultimate tensile strength of 373 +/- 8.8 MPa and yield strength of 268 +/- 7.9 MPa, equivalent to monolithic composite simultaneously. This special architecture of shell renders itself a high capability of stress bearing and good toughness, and the nanoparticles in outer layer further slower crack development, which significantly postpone crack formation in shell. Subsequent propagation of cracks in Ti core is also constrained remarkably by the transformation-induced plasticity effect occurred ahead of crack tips resulting from stress-induced phase transformation of hcp-Ti into fcc-Ti. These factors lead to highest work hardening rate that undergoes a long plateau and thus overcome the strength-ductility trade-off of A356 alloy based PRMMC.
关键词	Metal matrix composites Core-shell structure Toughening mechanism Strengthening mechanism
资助者	National Natural Science Foundation of China ; Basic Scientific Fund of Gansu Universities ; Program for Hongliu Outstanding Talents of Lanzhou University of Technology
DOI	10.1016/j.compositesb.2020.108541
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51564035] ; Basic Scientific Fund of Gansu Universities[G2014-07] ; Program for Hongliu Outstanding Talents of Lanzhou University of Technology[2012-03]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Composites
WOS记录号	WOS:000600593500007
出版者	ELSEVIER SCI LTD
引用统计	被引频次：62[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/158720
专题	中国科学院金属研究所
通讯作者	Chen, Tijun
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 2.Purdue Univ, Sch Engn Technol, 401 N Grant St, W Lafayette, IN 47906 USA 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xuezheng,Chen, Tijun,Ma, Siming,et al. Overcoming the strength-ductility trade-off of an aluminum matrix composite by novel core-shell structured reinforcing particulates[J]. COMPOSITES PART B-ENGINEERING,2021,206:15.
APA	Zhang, Xuezheng,Chen, Tijun,Ma, Siming,Qin, He,&Ma, Jinyuan.(2021).Overcoming the strength-ductility trade-off of an aluminum matrix composite by novel core-shell structured reinforcing particulates.COMPOSITES PART B-ENGINEERING,206,15.
MLA	Zhang, Xuezheng,et al."Overcoming the strength-ductility trade-off of an aluminum matrix composite by novel core-shell structured reinforcing particulates".COMPOSITES PART B-ENGINEERING 206(2021):15.