Modelling the flash formation of linear friction welded 30CrNiMo8 high strength steel chains

Effertz, Pedro dos Santos; Fuchs, Franz; Enzinger, Norbert

doi:10.1007/s00170-017-0338-6

Cited by 16 publications

(9 citation statements)

References 22 publications

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“…plastic deformation in the transition and equilibrium phase by means of a thermo-mechanically coupled model. Unlike other studies, the initial phase during chain welding has considerable plastic deformation and is traduced in approximately 2 mm of burn-off, as reported in [20]. This has to do with the fact that the interfaces of the chains are not flat.…”

Section: Mesh Characteristicsmentioning

confidence: 86%

“…Similar to what is reported in Effertz et al [20], the 'single-body' approach is used. The first stage is modelled as a purely thermal model to represent the heating by friction in the initial phase; the second stage was used to account for The welds were carried out in a prototype machine, which is fully instrumented and allows the measurement of both normal and in-plane forces, as well as displacements, during the process.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Similar to what is reported in Effertz et al [20], the 'single-body' approach is used. The first stage is modelled as a purely thermal model to represent the heating by friction in the initial phase; the second stage was used to account for plastic deformation in the transition and equilibrium phase by means of a thermo-mechanically coupled model.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Since a rippling effect is not expected based on the results obtained in [20], the aforementioned interface element size seems adequate. Thus 0.5 mm elements were also used in the region of interest.…”

Section: Mesh Characteristicsmentioning

confidence: 99%

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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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Section: Mesh Characteristicsmentioning

confidence: 86%

Section: Numerical Simulationmentioning

confidence: 99%

“…Similar to what is reported in Effertz et al [20], the 'single-body' approach is used. The first stage is modelled as a purely thermal model to represent the heating by friction in the initial phase; the second stage was used to account for plastic deformation in the transition and equilibrium phase by means of a thermo-mechanically coupled model.…”

Section: Numerical Simulationmentioning

confidence: 99%

Section: Mesh Characteristicsmentioning

confidence: 99%

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

Effertz

Fuchs

Enzinger

2017

Metals

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“…The novelty in this article is presenting a quantitative measurement of the residual stress field in LFW 18CrNiMo7-6 steel chains, considering the welding parameters and the flash formation are already studied in detail [16]. The RS field was evaluated using HD technique.…”

Section: Introductionmentioning

confidence: 99%

Residual stresses in 18CrNiMo7-6 linear friction welded high strength steel chains

Nunes

Effertz

Quintino

et al. 2018

Int J Adv Manuf Technol

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Linear friction welding is a solid-state process that comprises rapid heating and cooling of the welded parts. Residual stresses (RS) as in every other welding process cannot be avoided. The presence of RS compromises the in-service performance and reliability. They influence stress corrosion cracking, fatigue strength, and the crack growth rate. Knowing the magnitude and nature of such stresses is critical for improving the quality of welded joints. Therefore, four different manufacturing stages of linear friction welded chain links were analyzed in the present study: "as forged" (F), "as welded" (A), "as welded" without flash (N), and post weld heat treated (P). The residual stress field was measured using the hole drilling (HD) method. The results of the hole drilling method showed to be independent of the measured position and symmetry with respect to the weld was observed in all evaluated regions. Close to the weld center line (WCL), the compressive stresses present in the "as forged" condition switched to tensile as a result of the welding process. However, in further regions, stresses remained almost unchanged for either A and N. The PWHT uniformizes the residual stress field along the whole weld region.

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