Experimental investigations on the state of the friction-welded joint zone in steel hybrid components after process-relevant thermo-mechanical loadings

Behrens, Bernd‐Arno; Bouguecha, Anas; Vucetic, Milan; Peshekhodov, I.; Matthias, Thorsten; Колбасников, Н. Г.; Соколов, С. Д.; Ganin, S. V.

doi:10.1063/1.4963532

Cited by 17 publications

(7 citation statements)

References 8 publications

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“…A triangular Berkovich diamond tip with a tip radius of less than 50 nm was used to determine the nano hardness and the modulus of elasticity. The indentation was force-controlled via a trapezoidal force-displacement function to avoid dynamic measurement defects [ 38 , 39 ]. The calibration of the Berkovich tip was carried out on a fused quartz specimen in the range from 100 µN to 10,000 µN.…”

Section: Methodsmentioning

confidence: 99%

Characterization and Modeling of Nano Wear for Molybdenum-Based Lubrication Layer Systems

et al. 2021

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As a result of global economic and environmental change, the demand for innovative, environmentally-friendly technologies is increasing. Employing solid lubricants in rolling contacts can reduce the use of environmentally harmful greases and oils. The aim of the current research was the development of a solid lubricant system with regenerative properties. The layer system consisted of a molybdenum (Mo) reservoir and a top layer of molybdenum trioxide (MoO3). After surface wear, Mo is supposed to react with atmospheric oxygen and form a new oxide. The determination of the wear volume of thin layers cannot be measured microscopically, which is why the wear behavior is initially determined on the nano level. In this work, single Mo and MoO3 coatings prepared by physical vapor deposition (PVD) are characterized by nano testing. The main objective was to determine the wear volume of the single coatings using a newly developed method considering the initial topology. For this purpose, nano-wear tests with different wear paths and normal forces were carried out and measured by in situ scanning probe microscopy (SPM). Based on the characteristic values determined, the coefficient of wear was determined for wear modeling according to Sarkar. The validation of the wear model developed was carried out by further wear tests on the respective mono layers.

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Section: Methodsmentioning

confidence: 99%

Characterization and Modeling of Nano Wear for Molybdenum-Based Lubrication Layer Systems

et al. 2021

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“…The heating profile for the measurements is plo ed in Figure 1 Here, each temperature was kept constant for 75 min and then increased within 25 mi The measurements began after the test temperature in the upper and lower heater wa constant for 15 min. To avoid dynamic measurement errors, among other things, a trap zoidal force-displacement function was used [22,23]. For each test temperature, 25 inden with a distance of 6 µm and a normal force of 5000 µN were recorded.…”

Section: Nanotechnical Investigationsmentioning

confidence: 99%

Investigation of the Hardness Development of Molybdenum Coatings under Thermal and Tribological Loading

et al. 2023

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The increasing global demand for innovative and environmentally friendly lubricants can be met through the use of solid lubricants. By switching from conventional lubricants such as various oils or grease to solid lubricants, new scopes of application can also be opened up. The main requirements for solid lubricants are a reduction in the coefficient of friction (CoF) and an increase in wear resistance. Due to the favourable material properties, molybdenum (Mo) coatings fulfil the tribological requirements and are therefore promising solid lubricants which can be applied via physical vapour deposition (PVD). In this work, the impact of substrate temperature on the hot hardness of deposited Mo coatings was determined. The specimen with the highest hot hardness was then tribologically examined both at the micro and nano level. Through an analysis of the wear tracks by means of nanoindentation and scanning electron microscopy (SEM), it was possible to detect the influence of the tribological load separately from that of the thermal loads. The results showed that the tribological load influenced the Mo coating by significantly increasing its hardness. This was achieved due to the work hardening of the Mo layer leading to an increase in the wear resistance of the coating.

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“…Rotary friction welding is suitable for welding different materials that cannot be joined by other welding processes [45]. For friction welding of hybrid components, various investigations have been carried out in the CRC 1153 in which the strengths of steel-steel alloy combinations have been analyzed [46], also in comparison to US laser beam welding [45]. In addition, the strengths of steel-aluminum alloy combinations at different temperatures have been investigated [47].…”

Section: Manufacturing Processes For Multi-materials Partsmentioning

confidence: 99%

Hybrid Bulk Metal Components

2021

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Experimental investigations on the state of the friction-welded joint zone in steel hybrid components after process-relevant thermo-mechanical loadings

Cited by 17 publications

References 8 publications

Characterization and Modeling of Nano Wear for Molybdenum-Based Lubrication Layer Systems

Characterization and Modeling of Nano Wear for Molybdenum-Based Lubrication Layer Systems

Investigation of the Hardness Development of Molybdenum Coatings under Thermal and Tribological Loading

Hybrid Bulk Metal Components

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