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Mg/Al REACTION AND MECHANICAL PROPERTIES OF Al ALLOY/Mg ALLOY FRICTION STIR WELDING JOINTS
Wang Dong1; Liu Jie2; Xia Bolue1; Ma Zongyi1
Corresponding AuthorMa Zongyi(zyma@imr.ac.cn)
2010-05-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume46Issue:5Pages:589-594
AbstractMg alloys are increasingly used in aerospace, aircraft and automotives structures due to the low density and good damping properties, especially, the welding of Mg alloy to Al alloys is of practical importance for widening the application of Mg alloys. Although friction stir welding (FSW) has been used to join Mg and Al alloys, defect free joints are achieved only in the thin plate (less than 4 mm). In this paper, three ways of FSW of 6 mm thick 6061-T651 Al alloy and AZ31 Mg alloy plates, offsetting the pin to the seam between the two plates (M4A4), to the Mg alloy side 2 mm (M6A2) and to the Al alloy side 2 mm (A6M2), were studied. The aim is to examine the effects of the relative position between tool and plate on the microstructure and mechanical properties of FSW Mg/Al alloys joint. SEM and XRD analyses revealed the formations of intermetallics Mg(17)Al(12) and voids in the interface between Mg and Al alloy plates in the three FSW samples. The voids are resulted from the melting and subsequent solidification of eutectic. In the M4A4 and M6A2 samples, some Al are stirred into the Mg alloy side during FSW, forming the Mg(17)Al(12), whereas in the A6M2 sample, sonic Mg stirred into the Al alloy side are also transformed to the Mg(17)Al(12). Some fine pores are observed around the Mg(17)Al(12). The hardness of the nugget zone exhibits a slight increase due to the formation of a small amount of Mg(17)Al(12). The intermetallics and pores at the jointed interface decrease the strength of the joints significantly.
Keywordfriction stir welding dissimilar alloy welding 6061 Al alloy AZ31 Mg alloy microstructure
Funding OrganizationNational Outstanding Young Scientist Foundation ; Chinese Academy of Sciences
DOI10.3724/SP.J.1037.2009.00802
Indexed BySCI
Language英语
Funding ProjectNational Outstanding Young Scientist Foundation[50525103] ; Chinese Academy of Sciences
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000278475200011
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/103043
Collection中国科学院金属研究所
Corresponding AuthorMa Zongyi
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Aviat Ind Corp China, Shenyang Liming Corp, Shenyang 110043, Peoples R China
Recommended Citation
GB/T 7714
Wang Dong,Liu Jie,Xia Bolue,et al. Mg/Al REACTION AND MECHANICAL PROPERTIES OF Al ALLOY/Mg ALLOY FRICTION STIR WELDING JOINTS[J]. ACTA METALLURGICA SINICA,2010,46(5):589-594.
APA Wang Dong,Liu Jie,Xia Bolue,&Ma Zongyi.(2010).Mg/Al REACTION AND MECHANICAL PROPERTIES OF Al ALLOY/Mg ALLOY FRICTION STIR WELDING JOINTS.ACTA METALLURGICA SINICA,46(5),589-594.
MLA Wang Dong,et al."Mg/Al REACTION AND MECHANICAL PROPERTIES OF Al ALLOY/Mg ALLOY FRICTION STIR WELDING JOINTS".ACTA METALLURGICA SINICA 46.5(2010):589-594.
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