Multi-axial load analysis of thick-walled component welds made of 13CrMoV9-10

Lausch, Thomas; Kannengießer, Thomas; Schmitz-Niederau, Martin

doi:10.1016/j.jmatprotec.2013.01.008

Cited by 20 publications

(18 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Reaction force amplitudes increase with each run during the welding process and are obviously lower with higher interpass temperatures.  However, low interpass temperatures lead to reduced reaction stress after subsequent cooling in accordance to recent studies [10][11][12].  In this work a first quantification of this effect was accomplished for high strength steel components of S960QL.…”

Section: Discussionsupporting

confidence: 82%

See 1 more Smart Citation

Influence of Heat Control on Welding Stresses in Multilayer-Component Welds of High-Strength Steel S960QL

Schröpfer

Kannengießer

Kromm

2014

AMR

Self Cite

View full text Add to dashboard Cite

Abstract. Today high-strength structural steels (yield strength ≥ 960 MPa) are increasingly applied. Therefore, weldments have to achieve equal strength. Yet, high residual stresses in those welds diminish the components safety. Especially high restraint intensities can lead to crack-critical stresslevels. A special 2-MN-test facility allowed online-measurements of global reaction forces under defined restraint conditions during welding and cooling of multilayer-component MAG-welds. Local residual stresses were measured via X-ray diffraction before and after relief of the restraint. Local and global stresses were highly affected by heat control.

show abstract

Section: Discussionsupporting

confidence: 82%

“… In this work a first quantification of this effect was accomplished for high strength steel components of S960QL.  Based on extensive recent studies concerned with the influence of heat control on reaction stresses under restraint conditions [11,12] in this work local welding stresses were involved.…”

Section: Discussionmentioning

confidence: 99%

Influence of Heat Control on Welding Stresses in Multilayer-Component Welds of High-Strength Steel S960QL

Schröpfer

Kannengießer

Kromm

2014

AMR

Self Cite

View full text Add to dashboard Cite

show abstract

“… Based on recent studies [4,6,7] this work involves a multi-axial analysis of welding stresses regarding local restraint stresses, global normal reaction stresses and bending stresses as a consequence of a lateral and angular restraint. All measurement methods are in good agreement.…”

Section: Discussionmentioning

confidence: 99%

“…For a variation of the restraint conditions, free shrinking, externally restrained and self-restrained weld tests were performed; see testing facility [4,7]. In this test setup, a shrinkage restraint and synchronous measurement of forces and stresses of the weld were achieved; see Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Besides ensuring metallurgical requirements by keeping a defined working range of heat control, high tensile residual stresses should be avoided. These stresses are contributors for crack initiation and may be detrimental for the lifetime, load capacity and component safety [3].Several recent numerical and experimental studies revealed that loads and stresses due to welding are affected by an interaction of the welding parameters, the applied materials and the restraint, which is subjected to the design of the weld [4][5][6][7][8]. Regarding the influence of a hindered shrinkage of a weldment, the residual stress (σ rs ) formation should be differentiated into a local and a global scope.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Multi-axial Analyses of Welding Stresses in High-Strength Steel Welds

Flohr

Schroepfer

Kannengießer

et al. 2016

Residual Stresses 2016

View full text Add to dashboard Cite

Abstract. Today's efforts for lightweight design result in a growing application of high-strength structural steels from 960 MPa. In welded structures of these steels increased demands regarding component safety and a high elastic ratio should be considered. Hence, the prevention of an evolution of high weld-induced tensile residual stresses is required. Recent studies showed that component related restraint conditions of welds are able to elevate welding induced stresses to critical values, depending on material characteristics, the welding process and parameters. This work involves multi-axial welding loads as a consequence of the superposition of local residual stresses, global reaction stresses and moments, varying the welding parameters under different restraint conditions. The global welding loads are measured via GMA-weld tests in a special testing facility and via a DIC(Digital Image Correlation)-system in a slot weld. Local transverse residual stresses were analysed by means of X-ray diffraction. The application of a less amount of weld runs due to a modified welding parameters and welds seam configurations revealed as a beneficial approach to reduce welding loads in high-strength steels. IntroductionIn modern steel constructions, e.g. mobile cranes, high-strength steels are required to ensure low selfweights. Besides higher ratios of lifting capacity to total weight of such constructions, higher energy and cost efficiencies are provided [1]. A series of high-strength base materials and filler metals was developed by the steel producers, recently. S960QL is one of the most important steel grades for the mobile crane industry. However, the design of welded structures and the welding process become more challenging with increasing material strength due to higher requirements for the component safety, higher elastic ratios and closer technological boundaries [2], for instance the cooling time from 800 °C to 500 °C (Δt 8/5 -cooling time). Besides ensuring metallurgical requirements by keeping a defined working range of heat control, high tensile residual stresses should be avoided. These stresses are contributors for crack initiation and may be detrimental for the lifetime, load capacity and component safety [3].Several recent numerical and experimental studies revealed that loads and stresses due to welding are affected by an interaction of the welding parameters, the applied materials and the restraint, which is subjected to the design of the weld [4][5][6][7][8]. Regarding the influence of a hindered shrinkage of a weldment, the residual stress (σ rs ) formation should be differentiated into a local and a global scope. Following Fig. 1a, local restraint stresses σ loc develop due to inhomogeneous volume changes in the weld and HAZ. They are subjected to the material behaviour and welding process. If the weld is externally restrained, these local stresses are superimposed globally by normal reaction stresses σ y due to the hindered lateral shrinkage ∆l of the component; see Fig. 1b. As a rule, component ...

show abstract

Correlating welding reaction stresses and weld process conditions for high-strength steel S960QL

Schroepfer

Kannengießer

2014

Weld World

View full text Add to dashboard Cite

Multi-axial load analysis of thick-walled component welds made of 13CrMoV9-10

Cited by 20 publications

References 2 publications

Influence of Heat Control on Welding Stresses in Multilayer-Component Welds of High-Strength Steel S960QL

Influence of Heat Control on Welding Stresses in Multilayer-Component Welds of High-Strength Steel S960QL

Multi-axial Analyses of Welding Stresses in High-Strength Steel Welds

Correlating welding reaction stresses and weld process conditions for high-strength steel S960QL

Contact Info

Product

Resources

About