Cracking Parameter of High Strength Steels related to heat affected zone cracking

Ito, Yoshiaki; Bessyo, Kiyoshi

doi:10.2207/qjjws1943.37.983

Cited by 59 publications

(32 citation statements)

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“…This value has in turn served as a proxy to cracking susceptibility. Several empirical values have been proposed (Table 1) weighting each element's effect in regards to the reference element carbon [13][14][15][16][17][18][19][20]. Hence, these formulas are usually limited in a range of compositions that are included into the envelope of compositions used for their determination.…”

Section: Carbon Equivalentmentioning

confidence: 99%

Towards the establishment of weldability test standards for hydrogen-assisted cold cracking

Kurji

Coniglio

2014

Int J Adv Manuf Technol

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Our depth of understanding on these points has matured significantly over time and, while there is not always universal agreement, it is at least possible to start highlighting factors important to standards. This paper examines these factors, including the welding parameters, restraint, hydrogen, and cracking index. When comparing different alloys having different thermal characteristics, the use of constant welding parameters (common practice) will result in variable weld penetration and weld pool shape, which can influence grain shape and microstructural features, which can result in inequitable weldability comparisons. Welding on test coupons having different dimensions can affect restraint, which will influence the residual stresses around the weldment. High restraint usually results in higher crack susceptibility. Also, hydrogen content present in a weldment depends on the thermal history, welding parameters, and surrounding atmosphere humidity, with high hydrogen contents associated to great cracking susceptibility. Finally, the selection of an appropriate cracking index is required for data analysis. Quantifications of crack length and minimum preheat temperature are common indexes used for comparison. Critical stress and hydrogen content are other indexes. But how well these indexes actually represent weldability are contentious issues. This paper will examine and quantify these issues in detail, thus providing the reader with an appreciation of all things that must be considered when preparing a standardized procedure for weldability testing.

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Section: Carbon Equivalentmentioning

confidence: 99%

Towards the establishment of weldability test standards for hydrogen-assisted cold cracking

Kurji

Coniglio

2014

Int J Adv Manuf Technol

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“…Multiple CE equations are available in literature [30][31][32] each taking into account numerous alloying elements, which include both ferrite and austenite stabilizers. Available equations include the CE IIW 30) and P cm developed by Ito et al 31) Studies have shown the CE IIW to better suit higher carbon steels with greater then 0.16% carbon.…”

Section: Fusion Zone Hardnessmentioning

confidence: 99%

“…Available equations include the CE IIW 30) and P cm developed by Ito et al 31) Studies have shown the CE IIW to better suit higher carbon steels with greater then 0.16% carbon. 33) P cm on the other hand is more appropriate for low-carbon low-alloy steel.…”

Section: Fusion Zone Hardnessmentioning

confidence: 99%

Microstructure and Mechanical Properties of Resistance Spot Welded Advanced High Strength Steels

et al. 2008

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“…þ 5B (Ito and Bessyo 1968) Assessment of steel weldability was performed by carrying out MMA and SAW butt welds on the specimen with K-shaped grooves. Welding was done parallel to the rolling direction.…”

Section: Methodsmentioning

confidence: 99%

Study of the sensitivity of high-strength cold-resistant shipbuilding steels to thermal cycle of arc welding

Layus

Kah

Хлусова

et al. 2018

Int J Mech Mater Eng

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Background: Structure and properties of welded joints of low-alloy thermomechanically processed (09G2FB) and quenched and tempered shipbuilding steels (10XN2MD, 08XN3MD, and 12XN3MF), welded with manual metal arc welding (MMA) and submerged arc welding (SAW), were studied. Methods: Effects of specific energy input on the microstructure, mechanical properties, and impact energy of the heat-affected zone (HAZ) have been investigated, and probable reasons for crack formation in welded joints have been found.

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Cracking Parameter of High Strength Steels related to heat affected zone cracking

Abstract: Weldcracking susceptibility, or simply, weldability, is a most significant problem in utilizing high

Cited by 59 publications

References 0 publications

Towards the establishment of weldability test standards for hydrogen-assisted cold cracking

Towards the establishment of weldability test standards for hydrogen-assisted cold cracking

Microstructure and Mechanical Properties of Resistance Spot Welded Advanced High Strength Steels

Study of the sensitivity of high-strength cold-resistant shipbuilding steels to thermal cycle of arc welding

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