Influence of Process Parameters on Microstructure and Mechanical Properties of Friction-Stir-Processed Mg-Gd-Y-Zr Casting

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	Influence of Process Parameters on Microstructure and Mechanical Properties of Friction-Stir-Processed Mg-Gd-Y-Zr Casting
	Q. Yang ; B. L. Xiao ; Z. Y. Ma
刊名	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
	2012
卷号	43A 期号:6 页码:2094-2109
关键词	magnesium alloy nugget zone strength aluminum welds composites behavior texture flow
ISSN号	1073-5623
中文摘要	Mg-10Gd-3Y-0.5Zr (wt pct) casting was subjected to friction stir processing (FSP) at a constant rotation rate of 800 rpm and varied travel speeds of 25, 50, and 100 mm/minute. FSP resulted in the generation of fine-grained microstructure and fundamental dissolution of coarse Mg-5(Gd,Y) phase at the grain boundaries, thereby enhancing the tensile properties significantly at both room and elevated temperatures. The grain size of the FSP samples decreased with the increasing travel speed, whereas the microstructure heterogeneity with the banded structure (onion rings) became evident at a higher travel speed. Tensile elongation of the FSP samples increased as the travel speed increased, whereas the highest strengths were obtained at the medium travel speed of 50 mm/minute. Higher strengths and greater elongations were observed for the FSP samples in the transverse direction (TD) than in the longitudinal direction (LD). After post-FSP aging, the strengths of the FSP samples were increased significantly with the TD and LD exhibiting the same strengths; however, the elongation was decreased remarkably with the TD having higher elongation than the LD. A variation of the tensile properties was discussed in detail based on the microstructure heterogeneity and fracture surfaces.
原文出处	://WOS:000303457000035
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60396]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. Yang,B. L. Xiao,Z. Y. Ma. Influence of Process Parameters on Microstructure and Mechanical Properties of Friction-Stir-Processed Mg-Gd-Y-Zr Casting[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2012,43A(6):2094-2109.
APA	Q. Yang,B. L. Xiao,&Z. Y. Ma.(2012).Influence of Process Parameters on Microstructure and Mechanical Properties of Friction-Stir-Processed Mg-Gd-Y-Zr Casting.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,43A(6),2094-2109.
MLA	Q. Yang,et al."Influence of Process Parameters on Microstructure and Mechanical Properties of Friction-Stir-Processed Mg-Gd-Y-Zr Casting".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 43A.6(2012):2094-2109.