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	Annealing behavior of nanostructured aluminum produced by cold rolling to ultrahigh strains
	Cao, W.Q. ; Godfrey, A. ; Hansen, N. ; Liu, Q.
	2010-10-12 ; 2010-10-12
关键词	Experimental/ aluminium annealing cold rolling crystallites deformation electron backscattering electron diffraction hardness materials preparation mechanical strength nanostructured materials nanotechnology texture/ isochronal annealing nanostructured aluminum cold rolling ultrahigh strains AA1100 AA1200 accumulative roll bonding microstructural measurement texture measurement electron backscatter diffraction mechanical strength hardness measurement deformation stored energy structural coarsening crystallite size distribution temperature 200 C to 420 C Al/ A8140G Other heat and thermomechanical treatments A6146 Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials A8116 Methods of nanofabrication and processing A8140E Cold working, work hardening post-deformation annealing, recovery and recrystallisation textures A6220M Fatigue, brittleness, fracture, and cracks A8140N Fatigue, embrittlement, and fracture A6220F Deformation and plasticity A8140L Deformation, plasticity and creep A6480G Microstructure A8120G Preparation of metals and alloys (compacts, pseudoalloys)/ temperature 4.7315E+02 to 6.9315E+02 K/ Al/el
中文摘要	The isochronal annealing behavior of nanostructured commercial purity aluminum (AA1100 and AA1200) produced by either cold rolling (CR) or accumulative roll bonding (ARB) up to ultrahigh strains of about 99.5 pct reduction in thickness has been studied in the temperature range from 200 degrees C to 420 degrees C. Microstructural and texture measurements were made using data from electron backscatter diffraction (EBSD) investigations, and the change in mechanical strength was followed using hardness measurements. A large effect of the rolling strain is observed on recovery at temperatures below 200 degrees C to 220 degrees C. This effect is exemplified by samples deformed to the largest strain, where a rapid decrease in the stored energy from approximately 2 MJ/m/sup 3/ in the deformed state to less than 0.5 MJ/m/sup 3/ is seen, accompanied by a large decrease in the hardness. A new method for analyzing the uniformity of the structural coarsening, based on analysis of the crystallite size distribution with respect to the mode, is described. The analysis demonstrates that annealing leads to locally nonuniform changes in the microstructure, and to a description of the annealing process at temperatures greater than 220 degrees C as one of conventional recrystallization.
语种	英语
出版者	Published Jointly by Minerals, Metals & Materials Society and and ASM International ; USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78401]
专题	清华大学
推荐引用方式 GB/T 7714	Cao, W.Q.,Godfrey, A.,Hansen, N.,et al. Annealing behavior of nanostructured aluminum produced by cold rolling to ultrahigh strains[J],2010, 2010.
APA	Cao, W.Q.,Godfrey, A.,Hansen, N.,&Liu, Q..(2010).Annealing behavior of nanostructured aluminum produced by cold rolling to ultrahigh strains..
MLA	Cao, W.Q.,et al."Annealing behavior of nanostructured aluminum produced by cold rolling to ultrahigh strains".(2010).

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