Behavior of Weld to S960MC High Strength Steel from Joining Process at Micro-Jet Cooling with Critical Parameters under Static and Fatigue Loading

Szymczak, Tadeusz; Szczucka-Lasota, Bożena; Węgrzyn, Tomasz; Łazarz, B.; Jurek, Adam

doi:10.3390/ma14112707

Cited by 11 publications

(8 citation statements)

References 17 publications

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“…They showed that a lower cooling rate leads to decreasing the yield point and tensile strength of S960 steel joints. Similar results were observed by Szymczak et al [32]. It was stated that micro-jet cooling, which increases the cooling rate, leads to improve the mechanical properties of welded joints.…”

Section: Introductionsupporting

confidence: 88%

Application Possibilities of the S960 Steel in Underwater Welded Structures

2022

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In this paper, the application possibilities of the ultra-high strength (UHSS) Domex 960 steel in the underwater welded structures are analyzed. In the research, the investigated material has been tested in bead-on-plate wet welding conditions with the usage of different heat input values, namely 0.63 kJ/mm, 0.72 kJ/mm and 0.93 kJ/mm. Specimens were performed by the manual metal arc (MMA) welding method with the usage of rutile covered electrodes. Firstly, the nondestructive visual testing (VT) was carried out. In the next step, the metallographic macro- and microscopic tests were performed. Finally, the hardness of the weld metal and heat-affected zone (HAZ) was measured by the Vickers HV10 method. The performed experiments allow the statement that the Domex 960 steel could be welded in a water environment. It also showed that increasing heat input leads to decreasing the hardness in HAZ by 30 HV10. It may result in decreasing the susceptibility to cold cracking during butt- and filet welding in the water environment.

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Section: Introductionsupporting

confidence: 88%

Application Possibilities of the S960 Steel in Underwater Welded Structures

2022

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“…This Special Issue, entitled “Development of Laser Welding and Surface Treatment of Metals”, is a complementary and valuable resource of knowledge in the following fields: Study of technological conditions of laser welding, investigation of test joints properties [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]; Analytical and numerical models of heat sources of laser beam and arc welding processes [ 19 , 20 , 22 , 23 ]; Study of laser cladding and investigations of the coating’s properties and tribological characteristics [ 27 , 28 , 29 , 30 , 31 , 32 , 33 ]; Study and development of fusion welding processes, investigation of properties of the deposit produced under forced cooling or underwater conditions [ 34 , 35 , 36 ]; Study of cladding, surfacing, and thermal spraying processes of wear-resistant coatings, characterization of the coatings [ 37 , 38 , 39 ]; Study of application of local strengthening of the thin-walled structure by laser treatment [ 40 ]. …”

Section: Short Characterization Of the Special Issuementioning

confidence: 99%

“…Study and development of fusion welding processes, investigation of properties of the deposit produced under forced cooling or underwater conditions [ 34 , 35 , 36 ];…”

Section: Short Characterization Of the Special Issuementioning

confidence: 99%

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Development of Laser Welding and Surface Treatment of Metals

Lisiecki

2022

Materials

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This Special Issue on Development of Laser Welding and Surface Treatment of Metals contains as many as twenty-two research articles mainly related to the application of lasers, but also on other welding processes that may be competitive to laser technologies under specific conditions. Despite the introduction of lasers for material processing in the 1960s, the continuous development of laser devices also leads to the development and expansion of laser technology applications. This Special Issue is a compendium of knowledge in the field of fusion welding, the manufacturing of surface layers and coatings with increased wear resistance and tribological characteristics, as well as corrosion resistance and the characterization of coatings and surface layers. The topics of the presented research articles include aspects related to laser welding (eight articles), especially technological conditions, the properties of different types of joints, and analytical and numerical aspects of modelling the laser heat sources. The second dominant issue concerns laser cladding and laser surface treatment of different ferrous and nonferrous metallic and composite materials (six articles). In addition, there are interesting results of the study of fusion welding under forced cooling of the deposit or underwater conditions (four articles), results on the characterization of wear resistance coating produced by different technologies that can be competitive for laser cladding (three articles), and an original study on local strengthening of the thin-walled structure by laser treatment (one article). This Special Issue provides very wide and valuable knowledge based on theoretical and empirical study in the field of laser and fusion welding, laser and related coating technologies, characterization of coatings, and wear phenomena.

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“…The fatigue test was supported by the requirements of the ASTM E468-18 standard [ 46 ] and employed the shape of the specimens and a value of the radius for the necking. This kind of hourglass specimen was elaborated on by one author of the article [ 47 , 48 ] in regards to application to the joints. The characteristic features of the specimen’s geometry are connected to a weld region, which directly occurs in the middle sections of the measuring zone.…”

Section: Details Of Weld Manufacturing Inspection and Testingmentioning

confidence: 99%

Hardox 450 Weld in Microstructural and Mechanical Approaches after Welding at Micro-Jet Cooling

et al. 2022

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The demand for high-strength steel welds, as observed in civil and transport engineering, is related to a mass reduction in vehicles. Container-type trucks are examples of this kind of transport means because their boxes are able to be produced using Hardox grade steels. Therefore, this study reflects on the properties of welds in the MAG welding of Hardox 450, obtained through an innovative micro-jet cooling process with helium. This joining technology aims to reduce the formation of defects and to obtain a joint with very good assumed mechanical properties. Structural components of grade steel require welds with acceptable mechanical parameters with respect to operational loading conditions. That is, this study focuses on selecting welding parameters for the Hardox 450 steel and determining the weld quality with respect to microstructural observations and mechanical tests, such as the Charpy, tensile and fatigue tests. Weld fracturing under increasing monotonic force was examined and was strongly related to both stress components, i.e., axial and shear. The joint response under fatigue was expressed through differences in the fracture zones, i.e., at a stress value lower than the proportional limit, and weld degradation occurred in the shear and axial stress components. The data indicate that the hourglass specimen, with the weld in the centre zone of the measurement section, can be directly used to determine a weld response under cyclic loading. The impact test results showed attractive behaviour in the tested joint, as represented by 47 J at −20 °C. The recommended MAG welding parameters for Hardox 450 steel are low-oxygen when using an Ar + 18% CO2 shielding mixture. The collected results can be directly used as a guide to weld thin-walled structures (6 mm) made of Hardox grade steel, while the data from mechanical tests can support the modelling, designing and manufacturing of components made from this kind of steel grade.

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Behavior of Weld to S960MC High Strength Steel from Joining Process at Micro-Jet Cooling with Critical Parameters under Static and Fatigue Loading

Cited by 11 publications

References 17 publications

Application Possibilities of the S960 Steel in Underwater Welded Structures

Application Possibilities of the S960 Steel in Underwater Welded Structures

Development of Laser Welding and Surface Treatment of Metals

Hardox 450 Weld in Microstructural and Mechanical Approaches after Welding at Micro-Jet Cooling

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