Mechanical properties of friction welded joint between Ti–6Al–4V alloy and Al–Mg alloy (AA5052)

Kimura, Masao; Nakamura, Shuichi; Kusaka, Masahiro; Suyama, Kenji; Fuji, Akiyoshi

doi:10.1179/174329305x57455

Cited by 48 publications

(26 citation statements)

References 29 publications

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“…The materials were machined to 12 mm diameters for the weld faying (contacting) surface (referred to as faying surface). All faying surfaces of specimens were polished with a surface grinding machine before joining in order to eliminate the effect of surface roughness on the mechanical properties of dissimilar material joints (Fuji, et al, 1994;Kimura, et al, 2005cKimura, et al, , 2011b.…”

Section: Methodsmentioning

confidence: 99%

Joining phenomena and tensile strength of friction welded joint between pure aluminum and pure copper

Kimura

Inui

Kusaka

et al. 2015

Mechanical Engineering Journal

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This paper describes the joining phenomena and the tensile strength of friction welded joint between type 1070 pure aluminum (CP-Al) and oxygen free copper (OFC). When the joint was made at a friction pressure of 30 MPa with a friction speed of 27.5 s −1 , the upsetting (deformation) occurred at the CP-Al side. When the joint was made at a friction time of 2.0 s, the whole weld interface on the OFC side had the transferred CP-Al, and it was obtained approximately 30% joint efficiency. Then, the joint efficiency increased with increasing friction time, and it was obtained approximately 63% joint efficiency at a friction time of 12.0 s. The joint fractured at the weld interface, which had a CP-Al adhering to the weld interface on the OFC side. When the joint was made with friction times of 2.0 s and 6.0 s, the joint efficiency increased with increasing forge pressure and then the joint was obtained the CPAl side fracture at a forge pressure of 135 MPa or higher. However, the joint did not achieve 100% joint efficiency because the adjacent region of the weld interface at the CP-Al side was softened. In addition, the joint at a friction time of 2.0 s had no intermetallic compound (IMC) layer at the weld interface although the not-joined region was slightly observed. On the other hand, the joint at a friction time of 6.0 s did not have the not-joined region at the weld interface although the IMC layer was slightly observed. In conclusion, to obtain higher joint efficiency with fracture on the CP-Al side, the joint should be made with higher forge pressure, and with the suitable friction time at which the entire weld interface of the OFC side had the transferred CP-Al. IntroductionBecause an expansion in the use of dissimilar metal joints (referred to as dissimilar joints) is expected and widely used in various component parts, easily welding method for dissimilar metal joints is required. On the other hand, dissimilar welding operations have several severe problems in industrial usage. One problem will occur when the dissimilar joints are welded by using fusion welding processes which conventionally produce intermediate layer (interlayer) consisting of brittle intermetallic compound (IMC) at the joint interface of both base metals to be joined. The interlayers usually give detrimental damages on mechanical and metallurgical properties of dissimilar joints (For example, American Welding Society, 1982). In particular, fusion welded joints between aluminum or its alloys (referred to as the Al-system material) and copper or its alloys (referred to as the Cu-system material) have also some problems, e.g. the generation of blowholes and cracks at the joint interface (For example, Mizuno et al., 1999). Therefore, a welding process is urgently required, which will reduce the degradation of the mechanical and metallurgical properties of the joints between Al-system material and Cu-system material. 1

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Section: Methodsmentioning

confidence: 99%

Joining phenomena and tensile strength of friction welded joint between pure aluminum and pure copper

Kimura

Inui

Kusaka

et al. 2015

Mechanical Engineering Journal

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“…Some solid phase welding methods, such as explosive welding [6], diffusion-bonding [7], and friction welding [8], have been developed to join aluminum to titanium. Although these methods could obtain usable joints, they are restricted by especial joint configuration.…”

Section: Introductionmentioning

confidence: 99%

Laser penetration welding of an overlap titanium-on-aluminum configuration

Chen

Yang

et al. 2016

Int J Adv Manuf Technol

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An overlap titanium-on-aluminum configuration based on laser penetration welding was designed to suppress the formation of intermetallic compounds. Weld surface appearance, weldgeometry, microstructure, and mechanical property of the joint were investigated. The collaps of upper liquid titanium closes keyhole filled with boiling aluminum vapor, which induces welding spatter. Optimizing processing parameters could control the welding spatter to some extent. Weld geometry is characterized by depth of the weld loss, depth of the penetration of titanium into aluminum and width of joining, which depends on processing parameters strongly. The overlap titanium-on-aluminum configuration can suppress the formation of intermetallic compounds inside Ti weld. Interfacial reaction appears between Ti weld and Al, and the reaction layers are composed of TiAl and TiAl 3 . The banded structures with Ti 3 Al were found inside Ti weld. Tensile capacity of the joint increases firstly and then decreases with increasing laser power or decreasing welding speed, depending on weld geometry and interfacial reaction. Moreover, there are two broken modes of the joints, which are fractured in interface and in Ti weld, respectively. When joints fracture in the Ti weld, the joint has the higher tensile property, up to 184 N/mm.

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“…(3)− (18) However, several friction welded joints, which were affected by the IMC that was generated at the weld interface, had brittle fractures themselves in the IMC. (3)−(10),(12)− (15) In addition, the joining mechanism of friction welding between dissimilar materials differs from that of similar materials because such mechanical properties as the tensile strength and such thermal properties as the thermal conductivity have different combinations. To determine the friction welding conditions theoretically, it is essential to clarify the joining phenomena and the joint mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Friction Welding Condition and Weld Faying Surface Properties on Tensile Strength of Friction Welded Joint between Pure Titanium and Pure Copper

Kimura

Saitoh

Kusaka

et al. 2011

JMMP

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This paper describes the effect of the friction welding condition and the weld faying surface properties on the tensile strength of the friction welded joint between pure titanium (Ti) and pure copper (OFC). The joint strength of the joint, which was made with the weld faying surface of the Ti side specimen finished with a surface grinding machine, was investigated. The joint did not have 100% efficiency and OFC side fracture regardless of the friction welding conditions. When the joint was made with a friction pressure of 75 MPa, the joint efficiency was approximately 64% regardless of the forge pressures, and all joints fractured at the weld interface, although that efficiency exceeded that of the joints made with other friction pressures. To improve the joint efficiency, one was made with a Ti side specimen whose weld faying surface was finished by buff polishing. The joint efficiency was increased to approximately 85%, although the joint fractured at the weld interface. Moreover, a joint at a friction pressure of 75 MPa with a forge pressure of 270 MPa or higher was obtained with an OFC side fracture, although it did not achieve 100% efficiency. The fact that the joint did not fracture at the OFC base metal was due to the mechanically mixed layer at the weld interface that depended on the maximum height of the Ti side weld faying surface. To clarify the reason why the joint did not achieve 100% joint efficiency, the tensile strength of the OFC base metal with the addition of various compressive stresses was investigated. When the compressive stress was higher than the yield stress of the OFC base metal, its tensile strength was lower than that without a compressive load. Moreover, the tensile strength along the radial direction of the OFC base metal was also slightly lower than that of the longitudinal direction. Hence, the fact that the joint did not also achieve 100% efficiency was due to the decrease in the tensile strength of the OFC base metal by the Bauschinger effect and the difference of the anisotropic property with as-manufactured condition.

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Mechanical properties of friction welded joint between Ti–6Al–4V alloy and Al–Mg alloy (AA5052)

Cited by 48 publications

References 29 publications

Joining phenomena and tensile strength of friction welded joint between pure aluminum and pure copper

Joining phenomena and tensile strength of friction welded joint between pure aluminum and pure copper

Laser penetration welding of an overlap titanium-on-aluminum configuration

Effect of Friction Welding Condition and Weld Faying Surface Properties on Tensile Strength of Friction Welded Joint between Pure Titanium and Pure Copper

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