Usage of Ti-surface-modified filler material to increase the joint strength of High-Strength Low Alloyed (HSLA) steels under different load types

Treutler, Kai; Wesling, Volker

doi:10.1007/s42452-020-03884-8

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…In addition, grain boundary ferrite is formed for higher joining energy levels. The found microstructure is typical for this type of filler metal 26 , 33 . For lower energy levels, a slight decrease in grain size can be anticipated, which is also a typical phenomenon for this type of filler.…”

Section: Experimental Procedures and Resultsmentioning

confidence: 62%

Beneficial use of hyperbaric process conditions on the welding of high-strength low alloy steels

Treutler

Brechelt

Wiche

et al. 2022

Sci Rep

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Hyperbaric welding is used for different steels in many underwater applications as a repair welding process. A difference between wet and dry welding processes can be made. Due to the increased ambient pressure, these processes have special features inherent in the process that influence the cooling and penetration behaviour. The positive use of these effects outside underwater applications is currently rarely addressed in science and application. The presented work establishes these advantages on the basis of a higher strength structural steel and characterizes the effects on the microstructure of a joined S700MC steel and on the mechanical properties of the joint. It will be shown that a hyperbaric environment can be used to orient the weld more towards the depth of the sheet. Furthermore, it will be shown that this change leads to modified cooling, which in itself influences the mechanical properties of the weld seam.

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Section: Experimental Procedures and Resultsmentioning

confidence: 62%

Beneficial use of hyperbaric process conditions on the welding of high-strength low alloy steels

Treutler

Brechelt

Wiche

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…For the development of an alternative alloying concept, it has already been proven by preliminary investigations that a change in the mechanical properties occurs through the application of thin-film coatings on solid wire surfaces. Furthermore, it was shown that an influence on the process properties is caused by the alloying elements present on the surface [16][17][18][19][20][21][22]. In addition, an influence on the process properties and explicitly on the characteristics of the welding arc was recognized.…”

Section: Introductionmentioning

confidence: 99%

Development of an Alternative Alloying Concept for Additive Manufacturing Using PVD Coating

2022

Self Cite

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New alloys are needed to adapt the material properties and to improve the weldability of arc-based additive manufacturing processes. The classic development of welding filler materials is time-consuming and cost-intensive. For this reason, an alternative alloy concept is investigated and qualified here. This is based on the thin-film coating of welding filler materials by means of PVD coating. An HSLA steel DIN EN ISO 14341-A G 50 7 M21 is used as the base material. This is alloyed with the elements Al, Cr, Nb, Ni and Ti by means of PVD thin-film coating. This procedure represents an alternative alloy concept. In the scope of the qualification, the influence of the process and material properties is investigated, and the alternative alloying concept is compared with the classical alloying concept of secondary metallurgy. The investigations have shown that the thin film coating on the surface of the welding filler metal affects the process properties in the form of a changed arc length. Furthermore, the mechanical properties and the effect on the microstructure morphology were investigated. These were compared in the same chemical composition with a Mn4Ni2CrMo produced by secondary metallurgy. The results are in agreement with regard to the mechanical properties and the effect on the microstructure morphology.

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Properties oriented WAAM—microstructural and geometrical control in WAAM of low-alloy steel

Treutler,

Gehling,

Scheck

et al. 2023

Weld World

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Today, arc-based additive manufacturing has great potential for industrial application due to new developments in robotics, welding technology, and computer-aided manufacturing. Two issues are currently the focus of research. One is the accurate generation of geometry with respect to the design, e.g., geometry fidelity, defined roughness, and shape deviations within the tolerances. Here, there are still open questions, particularly with regard to path planning and the dependence of the geometry on the selected process variables. The second topic is the adjustment or determination of the achievable mechanical and microstructural properties, as these are of crucial importance for the use of the technology in industry. The combination of both areas into a geometry- and property-oriented approach to additive manufacturing has been little discussed in the literature for arc-based welding processes. The correlations between cooling conditions and emerging properties can serve as a starting point for such a consideration. The temperature history depends on three key factors: the energy input, the interpass temperature (which in additive manufacturing is determined by the time to over-weld), and the heat transfer conditions, which are determined by the part geometry. The melt pool size or volume also depends on these three constraints. In this study, an approach is presented to realize property-oriented additive manufacturing from the interaction of property-oriented path planning and a melt pool size control system. By controlling the melt pool size, the cooling of the material can be adjusted within certain limits, and consequently, a local adjustment of the microstructure can be achieved, which greatly influences the local mechanical properties. This work demonstrates this approach for a low-alloy filler metal (DIN EN ISO 14341-A G 50 7 M21 4Mo/A5.28 ER80S-D2). Gas metal arc welding was carried out using an M21 shielding gas (82% Ar, 18% CO2). Finally, microstructural characterization will show that different microstructural morphologies and properties can be achieved in a component by combining property-oriented path planning and the use of a control loop to regulate the melt pool size.

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Usage of Ti-surface-modified filler material to increase the joint strength of High-Strength Low Alloyed (HSLA) steels under different load types

Cited by 5 publications

References 17 publications

Beneficial use of hyperbaric process conditions on the welding of high-strength low alloy steels

Beneficial use of hyperbaric process conditions on the welding of high-strength low alloy steels

Development of an Alternative Alloying Concept for Additive Manufacturing Using PVD Coating

Properties oriented WAAM—microstructural and geometrical control in WAAM of low-alloy steel

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