Residual stresses in Linear Friction Welding of aluminium alloys

Song, Xu; Xie, Mengying; Hofmann, Felix; Jun, Tea‐Sung; Connolley, Thomas; Reinhard, Christina; Atwood, Robert C.; Connor, Leigh D.; Drakopoulos, Michael; Harding, S. E.

doi:10.1016/j.matdes.2013.03.051

Cited by 68 publications

(34 citation statements)

References 24 publications

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“…The microstructure of LFW is characterized similarly to other welding methods by a thermo-mechanically affected zone (TMAZ) close to the weld line, a heat affected zone (HAZ) further from the weld line, and the unaffected parent material microstructure further still [20]. Song et al used X-ray diffraction measurements to determine the two in-plane strain components, which they used to validate a thermo-mechanical model and derive an analytical function which can describe the residual stresses for general FLW geometries [20].…”

Section: Forming Welding Joiningmentioning

confidence: 99%

Engineering Science at the I12 Beamline at Diamond Light Source

Drakopoulos

2017

Synchrotron Radiation News

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Section: Forming Welding Joiningmentioning

confidence: 99%

Engineering Science at the I12 Beamline at Diamond Light Source

Drakopoulos

2017

Synchrotron Radiation News

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“…Linear friction welding (LFW) is a solid state joining process consisting of two parts, wherein one them is stationary and forced against another that is reciprocating in a linear motion in order to generate frictional heat [1][2][3][4]. The heat, combined with force perpendicular to the weld interface, causes the material to deform and plasticize.…”

Section: Introductionmentioning

confidence: 99%

3D Modelling of Flash Formation in Linear Friction Welded 30CrNiMo8 Steel Chain

Effertz

Fuchs

Enzinger

2017

Metals

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Linear friction welding (LFW) is a solid-state welding process that has been thoroughly investigated for chain welding in recent years in order to replace the currently in use Flash Butt Welding (FBW) process. Modelling has proven to be an indispensable tool in LFW, thus providing necessary insight to the process, regardless of its final application. This article describes a 3D model developed in the commercial software DEFORM to study the LFW process of 30CrNiMo8 high strength steel in the Hero chain. Hence, a weakly coupled thermal and mechanical model were used, by means of the process experimental input such as displacement histories. The flash morphology and intervening mechanisms were analyzed. A thermal evaluation of different regions in the studied geometry was considered, and a correlation of the modeled and experimental width of the extrusion zone was established.

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“…Linear friction welding (LFW) is a solid state joining process in which two flat-edged components are joined together using a relative reciprocating motion under axial (compressive) force [1,2]. The process is divided into four distinct phases, which include the initial phase, the transition phase, the equilibrium phase and the deceleration phase [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The significance of residual stresses is that they may greatly influence the material and component performance through various mechanisms: ductility exhaustion, creep rupture, etc. [2]. Tensile residual stresses may reduce the performance or cause failure of components as they affect fatigue strength, creep or environmental degradation.…”

Section: Introductionmentioning

confidence: 99%

The effects of forging pressure and temperature field on residual stresses in linear friction welded Ti6Al4V joints

Yang

et al. 2016

Adv. Manuf.

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Linear friction welding (LFW), as a solid state joining process, has been developed to manufacture and repair blisks in aeroengines. The residual stresses after welding may greatly influence the performance of the welded components. In this paper, the distribution of residual stresses in Ti6Al4V joints after LFW was investigated with numerical simulations. The effects of applied forging pressure and temperature field at the end of the oscillating stages on the residual stresses within the joints were investigated. The results show that, the residual tensile stresses at the welded interface in the y-direction are the largest, while the largest compressive stresses being present at the flash root in the z-direction. Furthermore, the forging pressure and temperature field at the end of the oscillating stages strongly affect the magnitude of the residual stresses. The larger forging pressure produced lower residual stresses in the weld plane in all three directions (x-, y-, and z-directions). Larger variance, r, which decides the Gaussian distribution of the temperature field, also yields lower residual stresses. There is good agreement between simulation results and experimental data.

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Residual stresses in Linear Friction Welding of aluminium alloys

Cited by 68 publications

References 24 publications

Engineering Science at the I12 Beamline at Diamond Light Source

Engineering Science at the I12 Beamline at Diamond Light Source

3D Modelling of Flash Formation in Linear Friction Welded 30CrNiMo8 Steel Chain

The effects of forging pressure and temperature field on residual stresses in linear friction welded Ti6Al4V joints

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