Influence of aluminum content on the characterization of microstructure and inclusions in high-strength steel welds

Vanovsek, Wolfgang; Bernhard, Christian; Fiedler, Michael; Posch, Gerhard

doi:10.1007/s40194-012-0008-0

Cited by 24 publications

(8 citation statements)

References 17 publications

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“…WM samples were cut along the cross-section perpendicular to the welding direction. The samples for inclusions observation and elemental analysis were prepared from 2 mm below the surface on the last layer, as shown in Figure 1, as this position is the most representative one [27]. Total O and N contents of WMs were determined with an O-N analyzer (TC500, LECO, U.S.A.).…”

Section: Experimental Methodsmentioning

confidence: 99%

Evolution of inclusions in novel cryogenic high-Mn austenitic steel weld metal with cerium addition

Zhang

Wang

et al. 2023

Science and Technology of Welding and Joining

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Cerium (Ce) was effectively transitioned into the high-Mn austenitic steel weld metal under submerged arc welding by adding cerium dioxide and calcium silicon reducing agents into flux. The evolution behaviours of the composition, number density and size of inclusions in weld metal with different Ce contents were systematically investigated by thermodynamic calculation and experiments. The results show that the number density of inclusions increased and average size decreased with the increase of Ce content from 0 to 0.087 wt-%. Meanwhile, and the percentage of inclusions number with size less than 0.80 μm increased from 79.28% to 91.43%. The evolutionary process of inclusions was Al 2 O 3 → Al 11 O 18 Ce → CeAlO 3 → Ce 2 O 3 → Ce 2 O 2 S with the increase of Ce content in the present weld metal. In particular, Ce-O-S-Al inclusion was extracted by in-situ sample preparation method, which proved its internal structure and evolution process. The complete formation model of Ce-Al-O-S system was also established.

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Section: Experimental Methodsmentioning

confidence: 99%

Evolution of inclusions in novel cryogenic high-Mn austenitic steel weld metal with cerium addition

Zhang

Wang

et al. 2023

Science and Technology of Welding and Joining

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“…The presence of hydrogen is unwanted due to its diffusion tendency to the crystal boundaries during cooling of the weld. Hence, introduction of hydrogen during welding of U/AHSS steels, due to the chemically bonded water/moisture in the electrode, filler material and shielding gas, etc., must be strictly avoided to prevent embrittlement [2,16]. The presence of hydrogen in concentration of a few parts per million is often enough to cause brittle failure [2].…”

Section: Introductionmentioning

confidence: 99%

Remote Fibre Laser Welding of Advanced High Strength Martensitic Steel

Prijanovič¹,

Tonkovič²,

Trdan

et al. 2020

Metals

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The study presents the results of remote robotic laser welding of advanced high strength Docol® 1200 M martensitic steel. One mm thick samples were welded in a lap joint configuration using a special clamping system. Welding was done using a continuous-wave (CW) fibre laser with a constant welding power of 300 W and constant focus diameter Ø 1.8 mm. Welding was done using 12 different welding speeds in the range from 0.15 to 1 m/min, whereas the inclination angle was kept constant at 0°. The influence of various welding speeds and linear heat inputs during welding on microstructural changes were examined by the occurrence of acicular and allotriomorphic ferrite or martensite. Results revealed big influence of the clamping system on the accumulation of the laser beam energy, heat sink and consequently weld size and geometry, as well as its microstructure and joint strength. Tensile-shear strength, microstructure and hardness results confirmed laser power of 300 W and 0.6 m/min welding speed as the optimal parameters, at which a martensitic structure was obtained in the weld. The width of the heat affected zone (HAZ) in this case is 1100 μm.

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“…W. Vanovsek lieferte hier Ansätze, die primäre dendritische Struktur mithilfe einer Pikrinsäure-Ätzung sichtbar zu machen und die ehemaligen Austenitkörner nach einer Nital-Ätzung auszuwerten [8,9].…”

Section: Introductionunclassified

Mikrostrukturielle Charakterisierung von ultra-hochfesten Schweißgütern

Haslberger

Ernst

Schnitzer

2016

Berg Huettenmaenn Monatsh

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Microstructural Characterization of Ultra-high Strength All-weld MetalAbstract: Welded steel structures are a crucial part of lightweight constructions in several industrial segments. The filler metal plays a vital role in optimizing the properties of welded joints. In this study different methods were used to characterize the microstructure of ultra-high strength allweld metal samples with different chemical compositions. It was evaluated which method can be used to link the grain size of a sample to its toughness.

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Influence of aluminum content on the characterization of microstructure and inclusions in high-strength steel welds

Cited by 24 publications

References 17 publications

Evolution of inclusions in novel cryogenic high-Mn austenitic steel weld metal with cerium addition

Evolution of inclusions in novel cryogenic high-Mn austenitic steel weld metal with cerium addition

Remote Fibre Laser Welding of Advanced High Strength Martensitic Steel

Mikrostrukturielle Charakterisierung von ultra-hochfesten Schweißgütern

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