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Friction stir welding of as-extruded Mg-Al-Zn alloy with higher Al content. Part I: Formation of banded and line structures
J. Yang; D. R. Ni; D. Wang; B. L. Xiao; Z. Y. Ma
2014
Source PublicationMaterials Characterization
ISSN1044-5803
Volume96Pages:142-150
Abstract6-mm-thick extruded Mg-Al-Zn (AZ80) alloy plates were subjected to friction stir welding at a welding speed of 100 mm.min(-1) and tool rotation rates of 400-1200 rpm, and the highest joint efficiency of 92% was achieved at 800 rpm. Friction stir welding resulted in the dissolution of coarse beta-Mg17Al12 particles, with fewer and smaller p particles distributed at the grain boundaries in the nugget zones; meanwhile, banded structures resulting from different Al concentrations were observed in the nugget zones. As the rotation rate increased, the grain size of the nugget zones increased, but the beta particles showed little variation in the quantity and size. At low rotation rates, uniform microstructures were produced in the joints, and during tensile testing the joints failed in the nugget zones where was the lowest hardness region of the joints. However, a line structure containing the beta particles was observed at the boundary of the nugget zone at the highest rotation rate, which resulted in a decrease in the tensile properties. The results indicated that higher rotation rates would not be suitable for the friction stir welding of wrought Mg-Al-Zn alloys with higher Al content. (C) 2014 Elsevier Inc. All rights reserved.
description.department[yang, j. ; ni, d. r. ; wang, d. ; xiao, b. l. ; ma, z. y.] chinese acad sci, inst met res, natl lab mat sci, shenyang 110016, peoples r china. ; ma, zy (reprint author), chinese acad sci, inst met res, natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; zyma@imr.ac.cn
KeywordMagnesium Alloys Friction Stir Welding Banded Structure Line Structure Mechanical Properties Az91 Magnesium Alloy Welded Zk60 Alloy Mechanical-properties Microstructural Evolution Fracture-behavior Aluminum Texture Deformation Parameters Temperature
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73468
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. Yang,D. R. Ni,D. Wang,et al. Friction stir welding of as-extruded Mg-Al-Zn alloy with higher Al content. Part I: Formation of banded and line structures[J]. Materials Characterization,2014,96:142-150.
APA J. Yang,D. R. Ni,D. Wang,B. L. Xiao,&Z. Y. Ma.(2014).Friction stir welding of as-extruded Mg-Al-Zn alloy with higher Al content. Part I: Formation of banded and line structures.Materials Characterization,96,142-150.
MLA J. Yang,et al."Friction stir welding of as-extruded Mg-Al-Zn alloy with higher Al content. Part I: Formation of banded and line structures".Materials Characterization 96(2014):142-150.
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