The Investigations of Fatigue Cracking of Laser Welded Joint with the Use of ‘FatigueVIEW’ System

Boroński, Dariusz; Sołtysiak, Robert; Giesko, T.; Marciniak, Tomasz; Lutowski, Zbigniew; Bujnowski, Sławomir

doi:10.4028/www.scientific.net/kem.598.26

Cited by 17 publications

(13 citation statements)

References 2 publications

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“…For each type of composite tested, three specimens were made with shapes and nominal dimensions shown in Figure 2b. Due to the very small dimensions of the measurement area of the specimens, ave ing approximately 1.0 × 0.7 mm, the digital image correlation (DIC) method was emplo for strain measurement in the MFS system [27]. This method involves strain measurem based on the natural image of the specimen surface without the application of additi markers.…”

Section: Mechanical and Tribological Testing Methodsmentioning

confidence: 99%

The Influence of the Modification of Carbon Nanotubes on the Properties of Copper Matrix Sintered Materials

Piasecki,

Sobkowiak,

Boroński

et al. 2024

Materials

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This paper presents the results of research on the microstructure, mechanical, and tribological properties of Cu/0.5 wt.% MWCNT (multi-walled carbon nanotube) sintered composite materials produced by powder metallurgy. The purpose of this research was to investigate the impact of carbon nanotube modifications on the uniformity of their dispersion and the effectiveness of their bonding with the matrix. The MWCNTs were modified by chemical oxidation. Additionally, a modification of the ingredient mixing method utilizing ultrasonic frequencies was employed. The tests were carried out using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Vickers hardness tests, static compression tests, and wear tests using the pin-on-disc method. Furthermore, mechanical properties and strain distribution analyses of the micro-specimens were conducted using the Micro-Fatigue System (MFS). The implemented modifications had a positive effect on the dispersion of MWCNTs in the copper matrix and on the mechanical and tribological properties of the sinters.

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Section: Mechanical and Tribological Testing Methodsmentioning

confidence: 99%

The Influence of the Modification of Carbon Nanotubes on the Properties of Copper Matrix Sintered Materials

Piasecki,

Sobkowiak,

Boroński

et al. 2024

Materials

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“…The second drive system with a resolution of 1 µm is based on a precise electromechanical actuator. Given the small size of the measuring part of the specimens, the digital image correlation method [36] was used to measure the strain in the MFS system. In the DIC method, the measurement of the strain is based on the natural image of the specimen surface without additional markers applied.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties and Microstructure of Dissimilar S355/AA6061-T6 FSW Butt Joints

Ziółkowski,

Boroński,

Skibicki

et al. 2023

Materials

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The aim of this paper is to analyse the mechanical properties of butt joints between S355 steel and 6061-T6 aluminium alloy, as well as their relationship to changes in the structure of the material caused by welding. The effect of the tool offset was analysed in particular. For the analysis, tensile tests were carried out using macro- and mini-specimens taken from S355/AA6061-T6 joints and base materials. In addition, the macro- and microstructure of the joints was determined, the hardness profiles in the joints were analysed, and fractographic analysis of the fractures of the specimens was carried out. Based on the results of the macro- and microstructure examinations, typical friction stir welding (FSW) joint zones were characterised. The microstructure was observed in the interface line of the materials on the root side, the negative effect of which on the quality of the joint was confirmed by digital image correlation (DIC) strain analysis during the monotonic tensile test. The highest average value of su = 141 MPa for the entire joint was obtained for a 0.4 mm tool offset. The highest average value of su = 185 MPa for the selected joint layer was obtained for a 0.3 mm tool offset. Fracturing of the joint in the selected layer for the tool offset values of 0.3 mm and 0.4 mm occurred in the weld nugget zone (WNZ) where the lowest hardness was recorded.

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“…Their analysis is realized with the software of Micro Fatigue System (MFS). Additionally, the original software developed for the FatigueVIEW system [54] was used to offline strain distribution analysis. In both systems (MFS and FatigueVIEW), the measurement of strains is performed on the basis of an image of the specimen's natural surface without applying additional markers.…”

Section: Methodsmentioning

confidence: 99%

Local mechanical properties of explosively welded AA2519-AA1050-Ti6Al4V layered material

Boroński

2020

Weld World

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The study presents the results of tests of local static and cyclic properties of an explosively welded AA2519-AA1050-Ti6Al4V layered material. In order to perform the analysis, tests were carried out with the use of microspecimens collected from 10 layers of AA2519-AA1050-Ti6Al4V material. Additionally, the determined static properties were compared with the results of an analysis based on microhardness measurement. Based on the test results, slight differences in static properties were found for particular layers of the material as well as a distinct softening of the AA2519 layer in relation to the base values. It was also found that the application of microhardness measurement for analysis of static properties can lead to their overestimation. Cyclic properties were described by the Ramberg-Osgood model. As in the case of static properties, the cyclic properties of particular layers of AA2519-AA1050-Ti6Al4V material differ insignificantly. The tests of cyclic properties showed that application for their description the Ramberg-Osgood model, based on parameters determined for whole range of plastic strains, can lead to significant errors in the modeling of a layered material. The cyclic instability of Ti6Al4V and AA2519 alloys has a significant influence on the parameters to be determined for material models of the analyzed material.

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The Investigations of Fatigue Cracking of Laser Welded Joint with the Use of ‘FatigueVIEW’ System

Cited by 17 publications

References 2 publications

The Influence of the Modification of Carbon Nanotubes on the Properties of Copper Matrix Sintered Materials

The Influence of the Modification of Carbon Nanotubes on the Properties of Copper Matrix Sintered Materials

Mechanical Properties and Microstructure of Dissimilar S355/AA6061-T6 FSW Butt Joints

Local mechanical properties of explosively welded AA2519-AA1050-Ti6Al4V layered material

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