Characterization and properties of nanocrystalline surface layer in Mg alloy induced by surface mechanical attrition treatment

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	Characterization and properties of nanocrystalline surface layer in Mg alloy induced by surface mechanical attrition treatment
	Y. H. Wei; B. S. Liu; L. F. Hou; B. S. Xu; G. Liu
	2008
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	452 期号:2 页码:336-342
摘要	By means of surface mechanical attrition treatment (SMAT), a nanocrystalline (NC) surface layer about 40 mu m was synthesized on an AZ91D Mg alloy. The microstructural features of the surface layer produced by SMAT were systematically characterized by optical microscopy (OM) observations, X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) investigations. and hardness measurement was also carried out in order to examine the hardness variation along the depth. Experimental results show that the microstructure is inhomogeneous along the depth. In the region from top surface to about 10 Rut in depth, the grain size increases from about 50 nm to 100 nm. In the adjacent region of about 10-40 mu m in depth, the grain size increases from about 100 nm to 400 nm. The grain refinement can be attributed to the activity of dislocation and occurrence of dynamic recrystallization. Moreover, emergence of stacking faults in the grain interior is a novel discovery. After the SMAT, the micro-hardness of the surface layer was enhanced significantly compared with that of the original sample. (c) 2006 Elsevier B.V. All rights reserved.
部门归属	[wei, ying-hui; liu, bao-sheng; hou, li-feng; xu, bing-she] taiyuan univ technol, coll mat sci & engn, taiyuan 030024, peoples r china. [liu, gang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wei, yh (reprint author), taiyuan univ technol, coll mat sci & engn, taiyuan 030024, peoples r china;yhwei@public.ty.sx.cn
关键词	Metals Surface Mechanical Attrition Treatment Surface Nanocrystallization Dynamic Recrystallization Micro-hardness Dynamic Recrystallization Grain-size Deformation Al Microstructures Aluminum Temperature Magnesium Friction Steel
URL	查看原文
WOS记录号	WOS:000254096800026
引用统计	被引频次：105[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/321006/33190
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. H. Wei,B. S. Liu,L. F. Hou,et al. Characterization and properties of nanocrystalline surface layer in Mg alloy induced by surface mechanical attrition treatment[J]. Journal of Alloys and Compounds,2008,452(2):336-342.
APA	Y. H. Wei,B. S. Liu,L. F. Hou,B. S. Xu,&G. Liu.(2008).Characterization and properties of nanocrystalline surface layer in Mg alloy induced by surface mechanical attrition treatment.Journal of Alloys and Compounds,452(2),336-342.
MLA	Y. H. Wei,et al."Characterization and properties of nanocrystalline surface layer in Mg alloy induced by surface mechanical attrition treatment".Journal of Alloys and Compounds 452.2(2008):336-342.