Friction Welding of Oxygen Free Copper to Pure Aluminum.

Aritoshi, Masatoshi; Okita, Kozo; Enjo, Toshio; Ikeuchi, Kenji; Matsuda, Fukuhisa

doi:10.2207/qjjws.9.467

Cited by 20 publications

(17 citation statements)

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“…The evolution for Cu 9 Al 4 structure is reported to be due to 1) mechanical mixing due to stirring action of the tool pin 2) precipitate dissolution 3) interdiffusion in the grain boundaries. Similar results of phase Cu 9 Al 4 were also reported by Aritoshi [26]. Micrographs were taken at different regions but for the comparison purpose, the micrographs of SZ and TMAZ regions in Al side and Cu side are shown in Fig.…”

Section: Microstructure In the Weld Nuggetsupporting

confidence: 82%

Friction Stir Welds of Al Alloy-Cu: An Investigation on Effect of Plunge Depth

Wahid¹,

Siddiquee²,

Khan³

et al. 2016

Archive of Mechanical Engineering

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In the present study, butt joints of aluminum (Al) 8011-H18 and pure copper (Cu) were produced by friction stir welding (FSW) and the effect of plunge depth on surface morphology, microstructure and mechanical properties were investigated. The welds were produced by varying the plunge depth in a range from 0.1 mm to 0.25 mm. The defect-free joints were obtained when the Cu plate was fixed at the advancing side. It was found that less plunging depth gives better tensile properties compare to higher plunging depth because at higher plunging depth local thinning occurs at the welded region. Good tensile properties were achieved at plunge depth of 0.2 mm and the tensile strength was found to be higher than the strength of the Al (weaker of the two base metals). Microstructure study revealed that the metal close to copper side in the Nugget Zone (NZ) possessed lamellar alternating structure. However, mixed structure of Cu and Al existed in the aluminum side of NZ. Higher microhardness values were witnessed at the joint interfaces resulting from plastic deformation and the presence of intermetallics.

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Section: Microstructure In the Weld Nuggetsupporting

confidence: 82%

Friction Stir Welds of Al Alloy-Cu: An Investigation on Effect of Plunge Depth

Wahid¹,

Siddiquee²,

Khan³

et al. 2016

Archive of Mechanical Engineering

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show abstract

“…5. A similar mechanically mixed layer was also observed even in several friction welded joints for dissimilar materials combination as reported by many researchers (Ruge, et al, 1986;Yilmaz, et al, 1996;Fuwano, et al, 2000;Straffelini, et al, 2004;Meshram, et al, 2007;Arivazhagan, et al, 2008;Kimura, et al, 2011) in addition to CP-Al/OFC joint (Aritoshi, et al, 1991;Kimura, et al, 2015). Figure 8 shows the cross-sectional appearances of the weld interfaces of joints at various friction times.…”

Section: Transitional Changes Of Weld Interfacesupporting

confidence: 82%

“…7b). Hence, it is desirable to be set of an opportune friction time which generate less mechanically mixed layers of the joint because that layer will be affected to the joint strength (Aritoshi, et al, 1991;Kimura, et al, 2011Kimura, et al, , 2015 in addition to the IMC interlayer as reported by some researchers (Nakanishi, et al, 1976;Lee, et al, 2005;Chen, et al, 2006;Saeid, et al, 2010;Wei, et al, 2016). However, all joints fractured from the weld interface as shown in Fig.…”

Section: Transitional Changes Of Weld Interfacementioning

confidence: 94%

“…Hence, it is desirable that the friction time was set to 6.0 s for obtaining good joint. Actually, the deformation at the weld interface to the radial direction was affected to the fractured point of some dissimilar friction welded joints (Aritoshi, et al, 1991;Fuji, et al, 1995;Kimura, et al, 2014). It was considered that one of the reason was the fiber structure at the adjacent region corresponding to the fractured position flowed from the longitudinal direction of the joint to the outer surface (Kimura et al, 2006).…”

Section: Investigation Of Fractured Point For Jointmentioning

confidence: 99%

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Effects of friction welding conditions on tensile strength of friction welded joint between 5052 Al alloy and pure copper

Kimura

Inui

Kusaka

et al. 2018

Mechanical Engineering Journal

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This paper described the tensile strength of friction welded joint between Al-Mg alloy (JIS A5052) and pure copper (OFC). In particular, the joining phenomena during the friction process and the effects of friction welding condition such as friction pressure, friction time and forge pressure on the joint strength have been investigated, and the metallurgical characteristics of joints have been also observed and analyzed. The adjacent region of the weld interface at the A5052 side was upset during the friction process, although that of the OFC side was hardly upset. When the joint was made with a friction pressure of 30 MPa, all joints fractured at the weld interface because those joints had the not-joined region at this portion. To reduce the not-joined region, the joint was made with increasing forge pressure. All joints did not have a joint efficiency of 100% (same tensile strength as the A5052 base metal) and the fracture on the A5052 base metal without crack at the weld interface, although the joint efficiency increased with increasing forge pressure. It was showed that the joint had the mechanically mixed layer as the lamellar structures of A5052 and OFC on the adjacent region of the weld interface at the A5052 side, and that layer influenced to the fractured point of the joint. The mechanically mixed layer decreased with decreasing friction time and with decreasing friction pressure after the initial peak. Then, the joint, which had the same tensile strength as the A5052 base metal, the fracture on the A5052 base metal with no crack at the weld interface, and less mechanically mixed layer with no the intermetallic compound (IMC) interlayer on the weld interface, could be successfully achieved. In conclusion, it was suggested that the joint should be made with a low friction pressures such as 20 MPa to prevent generating of the mechanically mixed layer, an opportune friction time such as 6.0 s without generating the IMC interlayer, and a high forge pressure such as 240 MPa in order to achieve completely joining of the weld interface and the fracture on the A5052 base metal.

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“…PAVENTHAN [2] investigated on the optimization of friction welding parameters to get good tensile strength of dissimilar metals. ANANTHAPADMANABAN [3] reported the experimental studies on the effect of friction welding parameters on properties of steel. DOBROVIDOV [4] investigated the selection of optimum conditions for the friction welding of high speed steel to carbon steel.…”

Section: Introductionmentioning

confidence: 99%