A regime beyond the Hall-Petch and inverse-Hall-Petch regimes in ultrafine-grained solids

doi:10.1038/s42005-022-01107-7

	A regime beyond the Hall-Petch and inverse-Hall-Petch regimes in ultrafine-grained solids
	Zhang, Huijun 6; Liu, Feng 6; Ungar, Goran 1,6; Zheng, Zhongyu 5; Sun, Qingping 4; Han, Yilong 2,3
刊名	COMMUNICATIONS PHYSICS
	2022-12-15
卷号	5 期号:1 页码:9
ISSN号	2399-3650
DOI	10.1038/s42005-022-01107-7
通讯作者	Zhang, Huijun(huijun@xjtu.edu.cn) ; Han, Yilong(yilong@ust.hk)
英文摘要	The strength of polycrystal increases as the grain diameter I decreases, i.e. the Hall-Petch behaviour. This trend reverses at about 3 < l < 15 nm, i.e. the inverse-Hall-Petch behaviour. How the grain size affects material's strength at l < 3 nm (-12 particles) remains unclear. Here our simulations use mixtures of soft and hard particles so that compression can continuously reduce Ito merely a few particles, resulting in ultrafine-grained solids termed as glass-crystal composites. Beyond the conventional Hall-Petch strengthening and inverse-Hall-Petch softening, we observe a power-law strengthening at l <14 particles as a result of the blockage of shear-banding by crystalline grains. Amorphous and crystalline regions accommodate shear strains via bond-breaking and collective rotation, respectively. Moreover, a polycrystal-glass transition occurs at l =14 particles featured with peaks of various quantities, which deepens the understanding on softening-strengthening transition.
资助项目	Fundamental Research Funds for the Central Universities[xxj032021001] ; Key R&D Project of Shaanxi Province[2022GY-400] ; National Natural Science Foundation of China[12274336] ; 111 Project 2.0[BP2018008] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040301] ; Guangdong Basic and Applied Basic Research Foundation[2020B1515120067] ; Hong Kong Research Grants Council under the General Research Fund[CRF-C6016-20G] ; Hong Kong Research Grants Council under the General Research Fund[C6021-19EF]
WOS关键词	SHEAR BANDS ; TRANSITION ; STRENGTH ; SIZE ; FLUCTUATIONS ; DEFORMATION ; BEHAVIOR
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000899584100001
资助机构	Fundamental Research Funds for the Central Universities ; Key R&D Project of Shaanxi Province ; National Natural Science Foundation of China ; 111 Project 2.0 ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Guangdong Basic and Applied Basic Research Foundation ; Hong Kong Research Grants Council under the General Research Fund
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/91476]
专题	力学研究所_国家微重力实验室
通讯作者	Zhang, Huijun; Han, Yilong
作者单位	1.Univ Sheffield, Dept Mat Sci & Engn, Sheffield, England 2.Hong Kong Univ Sci & Technol, Shenzhen Res Inst, Shenzhen 518057, Peoples R China 3.Hong Kong Univ Sci & Technol, Dept Phys, Clear Water Bay, Hong Kong, Peoples R China 4.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Clear Water Bay, Hong Kong, Peoples R China 5.Univ Chinese Acad Sci, Chinese Acad Sci, Inst Mech, Sch Engn Sci, Beijing, Peoples R China 6.Xi An Jiao Tong Univ, Shaanxi Int Res Ctr Soft Matter, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Huijun,Liu, Feng,Ungar, Goran,et al. A regime beyond the Hall-Petch and inverse-Hall-Petch regimes in ultrafine-grained solids[J]. COMMUNICATIONS PHYSICS,2022,5(1):9.
APA	Zhang, Huijun,Liu, Feng,Ungar, Goran,Zheng, Zhongyu,Sun, Qingping,&Han, Yilong.(2022).A regime beyond the Hall-Petch and inverse-Hall-Petch regimes in ultrafine-grained solids.COMMUNICATIONS PHYSICS,5(1),9.
MLA	Zhang, Huijun,et al."A regime beyond the Hall-Petch and inverse-Hall-Petch regimes in ultrafine-grained solids".COMMUNICATIONS PHYSICS 5.1(2022):9.