Microstructure of Dissimilar Joint Interface of Magnesium Alloy and Aluminum Alloy by Friction Stir Welding

Hirano, Shinji; Okamoto, K.; Doi, Masayuki; Okamura, Hisanori; Inagaki, Masahisa; Aono, Yasuhisa

doi:10.2207/qjjws.21.539

Cited by 65 publications

(29 citation statements)

References 3 publications

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“…Recently, the degree to which FSW can join dissimilar metals had been investigated in the combinations of Mg/Al [2][3][4][5] , Al/Ti 6) and Mg/Ti [7][8][9] . Among them, Mg/Ti dissimilar joining by FSW was investigated between Mg-Al-Zn alloy and commercial pure titanium.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Microstructure of CP-Ti and AZ31 Joint by Friction Stir Welding

Aonuma

Morikawa

Teranishi

et al. 2013

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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Friction stir welding (FSW) is a suitable solid-state joining process for dissimilar metal joining. We have performed metallographic characterizations to investigate the effects that an alloying element has on the interfacial microstructure between a dissimilar joint of AZ31 magnesium alloy and commercial pure titanium, produced by FSW. At the joint interface, an interfacial layer was observed with a thickness of less than 100 nm in a STEM-HAADF image produced with a transmission electron microscope (TEM) and an energy dispersive X-ray spectroscope (EDS). In this layer, TiAl intermetallic compound was observed with nano-beam diffraction (NBD).

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Section: Introductionmentioning

confidence: 99%

Interfacial Microstructure of CP-Ti and AZ31 Joint by Friction Stir Welding

Aonuma

Morikawa

Teranishi

et al. 2013

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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“…This joining method was suggested by some research. [7][8][9][10] In this study, the Ti alloy plate was positioned on the advancing side and the Al alloy plate was positioned on the retreating side. Square butt joints with 50 mm Â 150 mm Â 2:0 mm rectangular plates were used and grooved surfaces were machined and degreased with acetone.…”

Section: Introductionmentioning

confidence: 99%

Dissimilar Metal Joining of 2024 and 7075 Aluminium Alloys to Titanium Alloys by Friction Stir Welding

Aonuma

Nakata

2011

Mater. Trans.

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The friction stir welding (FSW) process is a solid-state joining process and the joining temperature is lower than that used in the fusion welding processes. Therefore, for dissimilar metal welding, FSW is considered to offer several advantages over fusion welding. The present work investigated the weldability of duralumin and titanium alloys using friction stir welding. The aluminum plates used in this work were 2024-T3 and 7075-T651, and the titanium plates used were pure titanium and Ti-6Al-4V. The average tensile strength of the Ti/2024 FSW joints was 311 MPa, and the tensile strength of the Ti/2024 joint was higher than that of the Ti/7075 FSW joint when the joining conditions were the same. A mixed region of Ti alloy and Al alloy was observed at the joint interface, and the joints mainly fractured at this region, where there was an intermetallic compound layer. In this region, a TiAl 3 intermetallic compound was detected by XRD. Therefore, it can be understood that this TiAl 3 intermetallic compound affects the tensile strength of butt joints.

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“…[14][15][16][17][18][19][20] However, there were not a lot of researches on dissimilar FSW between the aluminum and magnesium alloys. [18][19][20][21][22] Hirano et al 18) have carried out a dissimilar FSW between 1050 aluminum and AZ31 magnesium alloys, and reported that an intermediate layer was formed near their bonded interface, which was composed of an intermetallic compound Al 12 Mg 17 and an undefined compound. Sato et al 19) also have studied on the same system as Hirano et al, 18) although the plate thickness was different.…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20][21][22] Hirano et al 18) have carried out a dissimilar FSW between 1050 aluminum and AZ31 magnesium alloys, and reported that an intermediate layer was formed near their bonded interface, which was composed of an intermetallic compound Al 12 Mg 17 and an undefined compound. Sato et al 19) also have studied on the same system as Hirano et al, 18) although the plate thickness was different. According to their research, a eutectic microstructure was formed in the friction-stirwelded zone (SZ), which was composed of some pores, magnesium solid solution, and a large volume of intermetallic compound Al 12 Mg 17 .…”

Section: Introductionmentioning

confidence: 99%

Dissimilar Friction Stir Welding for Tailor-Welded Blanks of Aluminum and Magnesium Alloys

2009

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In this study, tailor-welded blanks (TWBs) composed of A5052P-O aluminum and AZ31B-O magnesium alloys were produced by the friction stir welding process. The sound surfaces without large defects were successfully obtained at the tool rotation speeds ranging from 1000 to 1400 rpm under the constant tool traverse speed of 300 mm/min, and the surface roughness was decreased in the friction-stir-welded zone (SZ) with the increase in the tool rotation speed. Also for 100, 300 and 500 mm/min, the sound surfaces without large defects were obtained under the constant tool rotation speed of 1400 rpm. The increase of the tool traverse speed led to the decrease in the surface roughness of the SZ. In the SZ, the bonded interface was clearly evident with plastic flow pattern between the aluminum and magnesium alloys, although an onion ring pattern was not formed. During tensile testing, the TWBs were fractured in the SZ at the early stage of the plastic deformation, i.e. strain hardening region, without remarkable area reduction near the fracture region. The TWBs exhibited the similar average tensile strength, showing that there were not noteworthy changes in the tensile strength as a function of the tool rotation speed. The average tensile strength, however, was slightly decreased with the increase in the tool traverse speed. It is noticeable that, in all cases, the joint efficiency of the TWBs exceeded 62%, and the maximum average tensile strength of about 143 MPa was obtained at 1400 rpm under the tool traverse speed of 100 mm/min, which was nearly equivalent to the joint efficiency of about 72%. The average total elongation of the TWBs was about 2% or less considerably lower than those of the base metals, without significant changes as functions of the tool traverse speed and the tool traverse speed.

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Microstructure of Dissimilar Joint Interface of Magnesium Alloy and Aluminum Alloy by Friction Stir Welding

Cited by 65 publications

References 3 publications

Interfacial Microstructure of CP-Ti and AZ31 Joint by Friction Stir Welding

Interfacial Microstructure of CP-Ti and AZ31 Joint by Friction Stir Welding

Dissimilar Metal Joining of 2024 and 7075 Aluminium Alloys to Titanium Alloys by Friction Stir Welding

Dissimilar Friction Stir Welding for Tailor-Welded Blanks of Aluminum and Magnesium Alloys

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