Cracking Parameter of High Strength Steels related to Heat Affected Zone Cracking (Report 2)

Ito, Yoshinori; Bessyo, Kiyoshi

doi:10.2207/qjjws1943.38.10_1134

Cited by 20 publications

(6 citation statements)

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“…Similar trends were also evident as the travel speed increased at constant heat input. The Ito ± Bessyo carbon equivalent (P cm parameter) 36 was determined for each weld and is given in Table 2. As the heat input increased, the carbon equivalent (which is a measure of hardenability) decreased.…”

Section: Results and Discussion Welding Procedures And Chemical Analysismentioning

confidence: 99%

Influence of heat input and travel speed on microstructure and mechanical properties of double tandem submerged arc high strength low alloy steel weldments

Viano

Ahmed

Schumann

2000

Science and Technology of Welding and Joining

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An evaluation is presented of the microstructural characteristics and mechanical properties of welds in 20 mm thickness high strength low alloy steel HSLA 80, of Australian manufacture. In total, nine butt joints were prepared using the double tandem (four wire) submerged arc welding process in which both heat input and travel speed were varied. The inclusion size distribution was determined for selected welds and showed that heat input had a major effect. Colour etching techniques were used to reveal the solidification structure, which in turn correlated with welding parameters. As the heat input increased, the cooling rate decreased resulting in a larger cellular dendritic cell spacing, decreased acicular ferrite content, and coarser acicular ferrite laths. The effect of travel speed on delta ferrite cell spacing and prior austenite grain size was found to be co-dependent on the heat input and the thermal profile resulting from multiple electrode welding. These results show that increased deposition rates can be achieved by increasing the travel speed and current density without sacrificing joint quality.

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Section: Results and Discussion Welding Procedures And Chemical Analysismentioning

confidence: 99%

Influence of heat input and travel speed on microstructure and mechanical properties of double tandem submerged arc high strength low alloy steel weldments

Viano

Ahmed

Schumann

2000

Science and Technology of Welding and Joining

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“…Table 1 presents the chemical compositions of the two steels obtained by spectroscopic analysis. The carbon equivalent (CE) values of the above steels have been determined using the Ito and Bessyo [11] equation which is reliable for low carbon steel. The top end of the ingot containing pipes was cropped off and the remaining ingot of 200×50×50 mm 3 size was subsequently hot forged to 16 mm thick slab.…”

Section: Methodsmentioning

confidence: 99%

Thermo-Mechanically Controlled Processed Ultrahigh Strength Steels

Chatterjee¹,

Ghosh²,

Bandyopadhyay³

2014

MSF

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A low-carbon, titanium and niobium (Ti-Nb) bearing and a low-carbon titanium, niobium and copper (Ti-Nb-Cu) bearing ultra high strength steel have been thermo-mechanically processed on a laboratory scale unit. Evolution of microstructure and mechanical properties of the above air cooled steels have been studied at different finish rolling temperatures (FRTs). Microstructural characterization reveals largely a mixture of granular bainite and bainitic ferrite along with the precipitation of microalloying carbide/carbonitride particles and/or Cu-rich precipitates. (Ti-Nb) bearing steel yields higher yield strength (1114-1143 MPa) along with higher tensile strength (1591-1688 MPa) and moderate ductility (12-13%) as compared to (Ti-Nb-Cu) bearing steel having yield strength (934-996 MPa) combined with tensile strength (1434-1464 MPa) and similar ductility (13%) for the selected range of 850-750°C FRT. Due to higher strength-ductility combinations, these present investigated steels can be regarded as the replacement material for ballistic applications as well as other sectors like defense, pipeline, cars, pressure vessels, ships, offshore platforms, aircraft undercarriages and rocket motor casings etc. Key words: Thermo-mechanical controlled processing, ultra high strength steel, microstructure, mechanical properties.

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“…However, modern microalloyed steels have a carbon content of < 0.12%. More adequately, the weldability of these steels reflects the carbon equivalent (2) [34].…”

Section: Weldability Of Materials Usedmentioning

confidence: 99%

Metallographic Study of Overlapped Laser Welds of Dissimilar Materials

Guzanová

Janoško

Draganovská

et al. 2022

Metals

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The paper deals with the metallographic analysis of overlapped laser welds of dissimilar materials based on galvanized and ungalvanized steels in various combinations. In addition to a gallery of metallographic sections, the paper presents the monitoring of weld defects, the measurement of selected weld geometrical characteristics and changes in weld microstructure by measuring the microhardness profile across the joint. The mixing of materials was monitored by area and line EDX analysis in the melting zone. Subsequently, the load carrying capacity of the formed joints was determined and compared with FEM simulation. Finally, the dependences of hardness and strength of welds on carbon content and carbon equivalent were determined.

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Cracking Parameter of High Strength Steels related to Heat Affected Zone Cracking (Report 2)

Cited by 20 publications

References 0 publications

Influence of heat input and travel speed on microstructure and mechanical properties of double tandem submerged arc high strength low alloy steel weldments

Influence of heat input and travel speed on microstructure and mechanical properties of double tandem submerged arc high strength low alloy steel weldments

Thermo-Mechanically Controlled Processed Ultrahigh Strength Steels

Metallographic Study of Overlapped Laser Welds of Dissimilar Materials

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