Size, Geometry and Nonuniformity Effects of Surface-Nanocrystalline Aluminum in Nanoindentation Test

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Size, Geometry and Nonuniformity Effects of Surface-Nanocrystalline Aluminum in Nanoindentation Test
	Wei YG(魏悦广); Shu SQ(舒思齐); Du Y(杜莹); Zhu C(朱晨)
刊名	International Journal of Plasticity
	2005
通讯作者邮箱	Ywei@LNM.imech.ac.cn
卷号	21 期号:11 页码:2089-2106
ISSN号	0749-6419
通讯作者	Wei, YG (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
中文摘要	In the present research, the mechanical behavior of the surface-nanocrystalline aluminum (SNCA) is investigated through nanoindentation experiment and theoretical modeling. Firstly, through microscopical observation and measurement for the SNCA material, a microstructure cell model is developed. Secondly, based on the microstructure cell model and the strain gradient plasticity theory, and based on introducing a parameter accounting for the grain size nonuniformity effect, the discrete features of the hardness-depth relations of the SNCA material are described. The "U-type" feature of the hardness-depth experimental curves is modeled and simulated. Thirdly, in the SNCA material the mechanical property of the grain boundary, i.e., the strength of plastic zone penetrating the grain boundary is characterized by introducing a criterion parameter, the critical effective plastic strain. The "waterfall-type" feature of the hardness-depth curves is modeled and simulated. It is worth pointing out that, in the present study, the length scale parameter in the strain gradient plasticity theory is taken as a universal material parameter instead of a simulation parameter, and it is determined through applying the strain gradient plasticity theory to the modeling of the corresponding single crystal aluminum.
学科主题	力学
类目[WOS]	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
研究领域[WOS]	Engineering ; Materials Science ; Mechanics
关键词[WOS]	STRAIN GRADIENT PLASTICITY ; LENGTH SCALE ; INDENTATION EXPERIMENTS ; METALLIC MATERIALS ; MICRO-INDENTATION ; DEFORMATION ; DAMAGE ; MECHANICS ; HARDNESS ; SOLIDS
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000231103900004
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/15532]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wei YG,Shu SQ,Du Y,et al. Size, Geometry and Nonuniformity Effects of Surface-Nanocrystalline Aluminum in Nanoindentation Test[J]. International Journal of Plasticity,2005,21(11):2089-2106.
APA	魏悦广,舒思齐,杜莹,&朱晨.(2005).Size, Geometry and Nonuniformity Effects of Surface-Nanocrystalline Aluminum in Nanoindentation Test.International Journal of Plasticity,21(11),2089-2106.
MLA	魏悦广,et al."Size, Geometry and Nonuniformity Effects of Surface-Nanocrystalline Aluminum in Nanoindentation Test".International Journal of Plasticity 21.11(2005):2089-2106.