Friction stir processing of thixoformed AZ91D magnesium alloy and fabrication of Al-rich surface

doi:10.1016/S1003-6326(09)60093-5

	Friction stir processing of thixoformed AZ91D magnesium alloy and fabrication of Al-rich surface
	Chen Ti-jun; Zhu Zhan-ming; Li Yuan-dong; Ma Ying; Hao Yuan
刊名	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
	2010-01
卷号	20 期号:1 页码:34-42
关键词	AZ91D alloy Al-rich surface layer friction stir processing thixoforming corrosion resistance
ISSN号	1003-6326
DOI	10.1016/S1003-6326(09)60093-5
英文摘要	The microstructural evolution characteristics of thermo-mechanically affected zone were investigated during friction stir processing (FSP) of the thixoformed AZ91D alloy. Simultaneously, an Al-rich surface layer was prepared by combination of Al powder using FSP method. The results indicate that the dynamic Tecrystallization and mechanical separation (including splitting and fracture of the primary grains) are the main mechanisms of grain refinement. For the thixoformed alloy, the operation efficiency of these mechanisms is less than that of the permanent mould casting AZ91D alloy, thus its microstructural evolution is relatively slow and the resulting grain size is relatively large. These are attributed to the differences in their original microstructures. The Al-rich Surface layer can obviously improve the corrosion resistance in NaCl aqueous solution. A proper solution heat treatment (at 415 degrees C for I h) can further increase the corrosion resistance. In order to improve corrosion resistance, increasing the amount and improving the distribution uniformity of the Al-rich phase are More effective than increasing the Al solubility in the matrix.
资助项目	National Basic Research Program of China[2007CB613706] ; Natural Science Foundation of Gansu Province, China[3ZS042-B25-003] ; Development Program for Outstanding Young Teachers in Lanzhou University of Technology, China[SKL03004]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000274692700006
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35302]
专题	材料科学与工程学院发展规划处
通讯作者	Chen Ti-jun
作者单位	Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Chen Ti-jun,Zhu Zhan-ming,Li Yuan-dong,et al. Friction stir processing of thixoformed AZ91D magnesium alloy and fabrication of Al-rich surface[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2010,20(1):34-42.
APA	Chen Ti-jun,Zhu Zhan-ming,Li Yuan-dong,Ma Ying,&Hao Yuan.(2010).Friction stir processing of thixoformed AZ91D magnesium alloy and fabrication of Al-rich surface.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,20(1),34-42.
MLA	Chen Ti-jun,et al."Friction stir processing of thixoformed AZ91D magnesium alloy and fabrication of Al-rich surface".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 20.1(2010):34-42.