Influence of Production-Related Gaps on Strength Properties and Deformation Behaviour of Spot Welded Trip Steel HCT690T

Brauser, Stephan; Pepke, Lutz-Alexander; Weber, Gert; Rethmeier, Michael

doi:10.1007/bf03321342

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…Due to the higher strength of these steels, higher restraints are induced along the process chain, e.g. as a consequence of increased springback after bending [3], potentially affecting the tendency of these steels to develop surface cracks [4]. Another aspect, that influences the weldability of AHSS, is the zinc coating, commonly applied for corrosion protection.…”

Section: Introductionmentioning

confidence: 99%

Investigation of liquid metal embrittlement of dual phase steel joints by electro-thermomechanical spot-welding simulation

Frei

Biegler

Rethmeier

et al. 2019

Science and Technology of Welding and Joining

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A 3D electro-thermomechanical model is established in order to investigate liquid metal embrittlement. After calibration to a dual phase steel of the 1000 MPa tensile strength class, it is used to analyse the thermo-mechanical system of an experimental procedure to enforce liquid metal embrittlement during resistance spot welding. In this procedure, a tensile stress level is applied to zinc coated advanced high strength steel samples during welding. Thereby, liquid metal embrittlement formation is enforced, depending on the applied stress level and the selected material. The model is suitable to determine and visualise the corresponding underlying stresses and strains responsible for the occurrence of liquid metal embrittlement. Simulated local stresses and strains show good conformity with experimentally observed surface crack locations.

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Section: Introductionmentioning

confidence: 99%

Investigation of liquid metal embrittlement of dual phase steel joints by electro-thermomechanical spot-welding simulation

Frei

Biegler

Rethmeier

et al. 2019

Science and Technology of Welding and Joining

Self Cite

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“…Tolerances in industrial production are critical influences on the choice of welding processes and parameters, as pointed out by Podržaj et al [1] as well as Schlosser and Jüttner [2] and Häßler and Füssel [3]. While Brauser et al [4] emphasized the effect of gaps on spot welding quality, Moos and Vezzetti [5] for the first time employed FEA to further investigate the effect of tolerances in complex assemblies. Bi et al [6] employed FEA to examine shunting at a challenging three-sheet joint, whereas van der Aa et al [7] optimized the welding parameters of a new automotive steel grade using FEA.…”

Section: Introductionmentioning

confidence: 99%

Determining Material Data for Welding Simulation of Presshardened Steel

Kaars

Mayr

Koppe

2018

Metals

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In automotive body-in-white production, presshardened 22MnB5 steel is the most widely used ultra-high-strength steel grade. Welding is the most important faying technique for this steel type, as other faying technologies often cannot deliver the same strength-to-cost ratio. In order to conduct precise numerical simulations of the welding process, flow stress curves and thermophysical properties from room temperature up to the melting point are required. Sheet metal parts made out of 22MnB5 are welded in a presshardened, that is, martensitic state. On the contrary, only flow stress curves for soft annealed or austenitized 22MnB5 are available in the literature. Available physical material data does not cover the required temperature range or is not available at all. This work provides experimentally determined hot-flow stress curves for rapid heating of 22MnB5 from the martensitic state. The data is complemented by a comprehensive set of thermophysical data of 22MnB5 between room temperature and melting. Materials simulation methods as well as a critical literature review were employed to obtain sound thermophysical data. A comparison of the numerically computed nugget growth curve in spot welding with experimental welding results ensures the validity of the hot-flow stress curves and thermophysical data presented.

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Effects of loading mode on the fatigue behavior of laser welds in automobile mild steel sheet

et al. 2016

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Influence of Production-Related Gaps on Strength Properties and Deformation Behaviour of Spot Welded Trip Steel HCT690T

Cited by 6 publications

References 5 publications

Investigation of liquid metal embrittlement of dual phase steel joints by electro-thermomechanical spot-welding simulation

Investigation of liquid metal embrittlement of dual phase steel joints by electro-thermomechanical spot-welding simulation

Determining Material Data for Welding Simulation of Presshardened Steel

Effects of loading mode on the fatigue behavior of laser welds in automobile mild steel sheet

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