Weld Metallurgy and Mechanical Properties of High Manganese Ultra-high Strength Steel Dissimilar Welds

Dahmen, Martin; Lindner, Stefan; Monfort, Damien; Petring, Dirk

doi:10.1016/j.phpro.2016.08.036

Cited by 12 publications

(3 citation statements)

References 11 publications

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“…Vickers hardness analysis was performed using a Zwick hardness tester, a proof load of 0.5 kgf was applied for 15 s to obtain high resolution measurements of the hardness distribution along the welded region [23]. The hardness measurements were obtained in triplicate for each of the different samples tested, FZ, BM, and TMP specimens.…”

Section: Methodsmentioning

confidence: 99%

Corrosion behaviour of resistance-spot-welded high-Mn austenitic TWIP steel

Monrrabal¹,

Jiménez²,

Ress

et al. 2020

Corrosion Engineering, Science and Technology

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High-Mn twinning-induced plasticity (TWIP) steels have been proposed to meet higher passenger safety and crash-safe vehicle frame requirements demanded by the automotive industry. The corrosion behaviour of welded Fe-30Mn-5Al-0.5C-6Cr TWIP steel using the resistance-spotwelding (RSW) technique was studied. Welds showed a microstructure consisting of primary austenite dendrites and interdendritic δ-ferrite in both fusion zone (FZ) and base metal (BM), which is in agreement with an austenitic-ferritic (AF) solidification mode. The results reveal that the refinement of the microstructure in the weld region does not significantly affect the corrosion resistance of this region, having a low corrosion current density of the order of 1 μA cm -2 . It was concluded that Cr-rich second phase particles along the austenite/δ-ferrite interface can lead to Crdepleted zones, increasing pitting corrosion susceptibility. It was found that the minimum Cr content at the Cr-depleted zones is nearly independent of the δ-ferrite volume fraction.

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Section: Methodsmentioning

confidence: 99%

Corrosion behaviour of resistance-spot-welded high-Mn austenitic TWIP steel

Monrrabal¹,

Jiménez²,

Ress

et al. 2020

Corrosion Engineering, Science and Technology

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“…This allows the manganese to melt, which promotes the reaction with residual oxygen in the build chamber or the direct sublimation. This can also be observed when welding high manganese steels [44]. Simulation results for the melt pool formation of 316L show that the evaporation temperature of sulphide (>3200 K) is reached in a small area of the melt pool at laser powers above 200 W [45].…”

Section: Discussionmentioning

confidence: 77%

Carbon Particle In-Situ Alloying of the Case-Hardening Steel 16MnCr5 in Laser Powder Bed Fusion

Schmitt

Gottwalt

Winkler

et al. 2021

Metals

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The carbon content of steel affects many of its essential properties, e.g., hardness and mechanical strength. In the powder bed fusion process of metals using a laser beam (PBF-LB/M), usually, pre-alloyed metal powder is solidified layer-by-layer using a laser beam to create parts. A reduction of the carbon content in steels is observed during this process. This study examines adding carbon particles to the metal powder and in situ alloying in the PBF-LB/M process as a countermeasure. Suitable carbon particles are selected and their effect on the particle size distribution and homogeneity of the mixtures is analysed. The workability in PBF-LB is then shown. This is followed by an evaluation of the resulting mechanical properties (hardness and mechanical strength) and microstructure in the as-built state and the state after heat treatment. Furthermore, potential use cases like multi-material or functionally graded parts are discussed.

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“…Velten et al evaluated mechanical properties after performing heterogeneous welding of high-manganese steel and ferrite steels through laser beam welding [14]. Martin et al performed structural analysis and evaluated mechanical properties after performing heterogeneous welding of high-manganese and ultra-high strength steels [15]. In this study, laser welding has been assessed for dissimilar material combinations without the filler metal.…”

Section: Introductionmentioning

confidence: 99%

A Study on Fiber Laser Welding of High-Manganese Steel for Cryogenic Tanks

Kim

Pyo

2020

Processes

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As the environmental regulations on ship emissions by the International Maritime Organization (IMO) become stricter, the demand for a ship powered by liquefied natural gas (LNG) is rapidly increasing worldwide. Compared to other materials, high-manganese steel has the advantages of superior impact toughness at cryogenic temperatures, a low thermal expansion coefficient, and a low-cost base material and welding rod. However, there is a limitation that the mechanical properties of a filler material are worse than those of a base material that has excellent mechanical properties. To solve these shortcomings, a basic study was performed to apply fiber laser welding with little welding deformation and no filler material to high-manganese steel. The relationship between laser welding parameters and penetration shapes was confirmed through cross-section observation and analysis by performing a bead on plate (BOP) test by changing laser power and welding speed, which are the main parameters of laser welding. In addition, the welding performance was evaluated through mechanical property tests (yield strength, tensile strength, hardness, cryogenic impact strength) of a welding part after performing the high-manganese steel laser butt welding experiment. As a result, it was confirmed that the yield strength of a high-manganese steel laser welding part was 97.5% of that of a base metal, and its tensile strength was 93.5% of that of a base metal.

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Weld Metallurgy and Mechanical Properties of High Manganese Ultra-high Strength Steel Dissimilar Welds

Cited by 12 publications

References 11 publications

Corrosion behaviour of resistance-spot-welded high-Mn austenitic TWIP steel

Corrosion behaviour of resistance-spot-welded high-Mn austenitic TWIP steel

Carbon Particle In-Situ Alloying of the Case-Hardening Steel 16MnCr5 in Laser Powder Bed Fusion

A Study on Fiber Laser Welding of High-Manganese Steel for Cryogenic Tanks

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