Effect of welding conditions on the friction weldability of 7075 aluminum alloy.

Ogawa, Kōichi; Ueda, Atsushi; Kaga, Seiichi; Yamaguchi, H.

doi:10.2464/jilm.41.504

Cited by 4 publications

(5 citation statements)

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“…In the center of the friction weld, some altered structures similar to central convex-lens were observed. Similar macrostructures were observed in other studies related to aluminum friction-welding joints of 15-20 mm [9][10][11] . The heat-affected zone of the outer peripheral portion exhibited a concave-lens shape.…”

Section: Temperature Change During Friction Weldingsupporting

confidence: 88%

“…Figure 7 shows the microstructure of the center at the weld interface from small-diameter joints. The microstructure showed a non-de ned ne structure in the axial direction of the brous direction with a heterogeneous appearance 10) . The axial center showed some stretched ne structure about 5-10 μm approximately in the axial and perpendicular direction.…”

Section: Temperature Change During Friction Weldingmentioning

confidence: 99%

“…This indicates the effect of the temperature on the softening effects when compared to the grain re ning ef-fect. This phenomenon is well known as a softening effect generated in the friction-welding joint on wrought or heat treatable aluminum alloys [12][13][14][15][16][17] . Figure 9 shows the width of the softened area determined from the hardness distribution.…”

Section: Hardness Distributionmentioning

confidence: 99%

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Microstructures and Mechanical Properties of Friction Welded Joint Using a 5052 Aluminum Alloy Small Diameter Rod

et al. 2017

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A 5052-H34 aluminum alloy rod having a diameter of 5 mm was friction-welded using a conventional automatic friction welder. The effect of welding conditions on the microstructure and mechanical properties of the welded joints were investigated. The total loss of mechanical strength of welded joints increases when increasing both the rotational speed and friction time. In addition,the total loss was negligibly low when the welding condition was submitted to N = 6000 rpm and t1 = 1 s. The welded joints showed a symmetrical macrostructure with respect to the weld interface and rotational axis. A layer with ne-grained microstructure was formed at the weld interface. The layer grew thicker by increasing both the rotational speed and friction time. The heat-affected zone was formed around the ne-grained layer. It tends to be larger with an increase in both the rotational speed and friction time. The softened area of the joints reached approximately 8 mm from the weld interface. In addition, the weld interface was cured under conditions of N = 6000 rpm and t1 = 1 s. The highest tensile strength of thin diameter joints was 209 MPa, which was obtained under conditions of N = 6000 rpm and t1 = 3 s. Its joint ef ciency reached 80% of that of the base metal.

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Section: Temperature Change During Friction Weldingsupporting

confidence: 88%

Section: Temperature Change During Friction Weldingmentioning

confidence: 99%

Section: Hardness Distributionmentioning

confidence: 99%

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Microstructures and Mechanical Properties of Friction Welded Joint Using a 5052 Aluminum Alloy Small Diameter Rod

et al. 2017

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“…Some researchers reported that A7075 joints made by a continuous (direct) drive friction welding machine showed good mechanical properties. [2][3][4][5][6][7] Ogawa et al…”

Section: Introductionmentioning

confidence: 99%

“…showed that an A7075 welded joint had a maximum joint efficiency of approximately 84%. 4 However, the joint efficiency was evaluated with a joint tensile test specimen that had a notch at the welded interface, and it is only possible to confirm that the joint efficiency is lower if the joint tensile test is carried out with a smooth tensile test specimen. Hazlett et al 2 and Fuwano et al 7 investigated the joint efficiency of an A7075 friction welded joint under different aging treatment conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of friction welding conditions and aging treatment on mechanical properties of A7075-T6 aluminium alloy friction joints

Kimura¹,

Choji²,

Kusaka³

et al. 2005

Science and Technology of Welding and Joining

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This article describes the effect of friction welding conditions and aging treatment on the mechanical properties of type 7075-T6 aluminium alloy (A7075) friction welded joints. A7075 was joined by using a continuous drive friction welding machine with an electromagnetic clutch in order to prevent braking deformation during as rotation speed decreases. That is, it was welded by using the ‘Low Heat Input Friction Welding Method’ (LHI method) developed by the authors, in which heat input is lower than in the conventional method. The maximum joint efficiency at a friction pressure of 30 MPa was approximately 25%, and that at 90 MPa was approximately 64%. These joints were made without forge pressure. The low joint efficiency was due to the existence of non-joined regions at the welded interfaces. However, the welded joint had approximately 82% joint efficiency when the friction time was 0·5 s at a friction pressure of 90 MPa with a forge pressure of 180 MPa. The welded joint softened at the welded interface and its adjacent region. It had approximately 90% joint efficiency after aging for 730 days at room temperature (natural aging). It also had approximately 95% joint efficiency after aging for 48 h at 393 K (120°C), and had no softened region at the welded interface. The heat input of the welded joint with the LHI method could be decreased to approximately 50% of that with the conventional method. The LHI method has several advantages for A7075 friction welding; less heat input than with the conventional method, and light post-weld processing (machining, etc.) because the flash can be minimised.

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Characteristics of Friction Welding Between Solid Bar of 6061 Al Alloy and Pipe of Al-Si12CuNi Al Cast Alloy

Kimura

Sakaguchi

Kusaka

et al. 2015

J. of Materi Eng and Perform

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Effect of welding conditions on the friction weldability of 7075 aluminum alloy.

Cited by 4 publications

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Microstructures and Mechanical Properties of Friction Welded Joint Using a 5052 Aluminum Alloy Small Diameter Rod

Microstructures and Mechanical Properties of Friction Welded Joint Using a 5052 Aluminum Alloy Small Diameter Rod

Effect of friction welding conditions and aging treatment on mechanical properties of A7075-T6 aluminium alloy friction joints

Characteristics of Friction Welding Between Solid Bar of 6061 Al Alloy and Pipe of Al-Si12CuNi Al Cast Alloy

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