Microstructure and microhardness in surface-nanocrystalline Al-alloy material

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	Microstructure and microhardness in surface-nanocrystalline Al-alloy material
	Wei YG(魏悦广); Wu XL(武晓雷); Zhu C; Zhao MH
	2007
关键词	Microstructure Nanoindentation test Size effect Surface-nanocrystalline Al-alloy TEM observation
摘要	Discussed and analyzed are the surface-nanocrystallization of Al-alloy material manufactured by using the ultrasonic shot peening method. The transmission electron microscope (TEM) is used to examine the microstructure features and nanocrystalline mechanisms, such as, the formed microbands, the divided subbands, the infinitesimally divided and formed nanometer-sized grains and grain boundaries, etc. Based on the microscale observation and measurement, the mechanical behaviors of the surface-nanocrystalline Al-alloy material are investigated experimentally at submicron scale by means of the nano-indentation test. The load- and hardness-indent depth curves are measured. The grain size and its nonuniform effects are investigated. In the theoretical modeling, based on the microstructure characteristics and the experimental features, a dislocation pile-up model considering grain size effect based on the Mott theory is presented and used. The experimental hardness-indent depth curves which display the strong size, geometry and nonuniformity effects are successfully modeled and predicted. © 2007 Springer.
专著/编著/文集名	Multiscaling in Molecular and Continuum Mechanics: Interaction of Time and Size from Macro to Nano: Application to Biology, Physics, Material Science, Mechanics, Structural and Processing Engineering
页码	369-387
出版者	Springer Netherlands
语种	英语
ISBN号	978-1-4020-5062-6
文献类型	图书章节
条目标识符	http://dspace.imech.ac.cn/handle/311007/85083
专题	力学所知识产出(1956-2008)
作者单位	LNM, Institute of Mechanics, Chinese Academy of Sciences, 100080 Beijing, China
推荐引用方式 GB/T 7714	Wei YG,Wu XL,Zhu C,et al. Microstructure and microhardness in surface-nanocrystalline Al-alloy material[Ch]. Multiscaling in Molecular and Continuum Mechanics: Interaction of Time and Size from Macro to Nano: Application to Biology, Physics, Material Science, Mechanics, Structural and Processing Engineering,Springer Netherlands,2007.

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