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

Schroepfer, Dirk; Kannengießer, Thomas

doi:10.1007/s40194-014-0127-x

Cited by 17 publications

(9 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Jiang et al [30] showed that as the heat input and the number of layers welded increases, the residual stress decreases and the use of multi-layer welding and higher heat input is beneficial in reducing the residual stress. Schroepfer et al [31] showed that the interlayer temperature has a significant effect on the overall reaction force and that increased heat input and higher interlayer temperature leads to higher strength. Yang et al [32] showed that within a certain range, increasing the welding interlayer temperature of P91 steel can expand the Mises low stress zone, increase the longitudinal residual compressive stress, and reduce the transverse residual tensile stress, and the maximum interlayer temperature should not exceed 315 • C. Most welding scholars mainly research objects for flat butt joints, T-shaped joints, pipe butt weld joints, and other relatively regular welded joints, but the more complex saddle-shaped welded joints for the weldolet of the multi-layer multi-pass welding structure are rarely researched.…”

Section: Introductionmentioning

confidence: 99%

Influence of Interlayer Temperature and Welding Sequence on the Temperature Distribution and Welding Residual Stress of the Saddle-Shaped Joint of Weldolet-Header Butt Welding

Mai

Zhang

et al. 2021

Materials

View full text Add to dashboard Cite

In this paper, based on Simufact Welding finite element analysis software, a numerical simulation of the temperature and residual stress distribution of the weldolet-header multi-layer multi-pass welding process is carried out, and the simulation results are verified through experiments. The experimental results are in good agreement with the numerical simulation results, which proves the validity of the numerical simulation results. Through the results of the numerical simulation, the influence of the welding sequence and interlayer temperature on the temperature and residual stress distribution at different locations of the saddle-shaped weld was studied. The results show that the temperature and residual stress distribution on the header and weldolet are asymmetric, and the high-stress area of the saddle-shaped welded joint always appears at the saddle shoulder or saddle belly position. When the interlayer temperature is 300 °C, the peak residual stress reaches a minimum of 428.35 MPa. Adjusting the welding sequence can change the distribution trend of residual stress. There is no high-stress area on the first welding side of the two-stage welding path-2. The peak values of residual stresses for continuous welding path-1 and two-stage welding path-2 are 428.35 MPa and 434.01 MPa, respectively, which are very close to each other.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Interlayer Temperature and Welding Sequence on the Temperature Distribution and Welding Residual Stress of the Saddle-Shaped Joint of Weldolet-Header Butt Welding

Mai

Zhang

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…The interaction between heat control (interpass temperature and heat input) and both local and global stresses in HS steel welds were also studied [18]. The investigations were focused on mechanical and microstructural properties an UHS steel (S960Q) in quenched and temper conditions.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characterization and Mechanical Properties of Electron Beam Welded Joint of High Strength Steel Grade S690QL

Błacha¹,

Węglowski²,

Dymek³

et al. 2016

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

In the paper the results of metallographic examination and mechanical properties of electron beam welded joint of quenched and tempered steel grade S690QL are presented. Metallographic examination revealed that the concentrated electron beam significantly affect the changes of microstructure in the steel. Parent material as a delivered condition (quenched and tempered) had a bainitic-martensitic microstructure at hardness about 290 HV0.5. After welding, the microstructure of heat affected zone is composed mainly of martensite (in the vicinity of the fusion line) of hardness 420 HV0.5. It should be noted, however, that the microstructure of steel in the heat affected zone varies with the distance from the fusion line. The observed microstructural changes were in accordance with the CCT-S transformation diagram for the examined steel.Keywords: electron beam welding, high strength quenched and tempered steel, microstructure

show abstract

“…a) O aumento da energia de soldagem mostrou gerar mais tensões residuais de acordo comLin e Chou (1995), Lin eLee (1997),Unnikrishnan et al (2014),Scotti (2014), Schroepfer eKannengiesser (2014Kannengiesser ( , 2017, mas há resultados discordantes, de acordo comColegrove et al (2009),Xu et al (2014), (seção 3.1); b) O aumento do volume de material aquecido (ZF+ZAC+MB) é um dos fatores determinantes na geração da tensão residual, de acordo comMasubuchi (1980),), Vakili-Tahami e Sorkhabi (2009, mas negligenciado por Lin e Lee (1997),Colegrove et al (2009),Xu et al (2014), ao se estudar, por exemplo, o efeito da energia de soldagem ou transformação de fases (seção 3.1.1); c) O aumento da espessura da chapa mostrou gerar mais tensões residuais de acordo com), Vakili-Tahami e Sorkhabi (2009, mas há resultados discordantes de acordo comLee et al (2012) (seção 3.1.1); d) A aplicação de resfriamento forcado mostrou aliviar as tensões residuais no metal de base, como afirmam Sudheesh e Prasad (2011). Por outro lado, os mesmos autores comentam sobre efeito desprezível do resfriamento sobre as TR na ZF e ZAC (seção 3.2).…”

unclassified

“…Os autores observaram redução de pico de TR longitudinais na ZAC e ZF e aumento nas regiões mais afastadas do cordão de solda quando o resfriamento forçado foi aplicado; (seção 3.1.1). e) O aumento da taxa de resfriamento de formação de martensita mostrou gerar menos tensões residuais de acordo com, mas há resultados discordantes de acordo comJones et al (1978) (seção 3.1.2); f) A aplicação de pré-aquecimento mostrou gerar mais tensões residuais de acordo com Lin e Lee (1997),Satoh et al (1975) e Schroepfer eKannengiesser (2014Kannengiesser ( , 2017, mas há resultados discordantes, de acordo com Heinze et al (2012a), Lee et al (2012) e Lee (2007) (seção 3.2); g) A aplicação de restrição externa mostrou mais tensões residuais e maior intensidade de acordo com Kohandehghan e Serajzadeh (2011) e Teng e Lin (1998), mas há resultados discordantes de acordo com Fu et al (2014), Heinze et al (2012b) e Akbari Mousavi e o efeito de parâmetros operacionais de soldagem sobre a geração de Tensões Residuais (TR) é bastante complexo, exatamente pela interligação entre os parâmetros envolvidos. Desta forma, o desafio é tentar encontrar uma metodologia que permita isolar o efeito das variáveis alvo do estudo, para trabalhar apenas com variáveis independentes.…”

unclassified

“…Kannengiesser (2014), em cujo artigo os autores apresentaram o efeito de energia de soldagem sobre as TR na união de chapas de 8 mm de espessura de aço de alta resistência. da energia de soldagem) indicam que as energias de soldagem mais altas aquecem um volume maior de material e no final as tensões residuais são distribuídas por um volume maior sem alterar significativamente o seu valor máximo.…”

unclassified

See 1 more Smart Citation

Uma visão holística da geração de tensões residuais em soldagem a arco e da medição por difração de raio X

Міщенко¹

View full text Add to dashboard Cite

Thermal stresses caused by heating and non-uniform cooling of a small volume of metal give rise to residual stresses in welding. Residual stresses are one of the main problems related to the manufacture of metal components where welding processes are involved. Despite constant growth of computational techniques, there is still a need for experimental work aimed at establishing general principles of cause and effect relationship in the generation of residual stresses. However, there is great disagreement in the literature among experimental results. One of the likely reasons would be the difficulty of identifying and discretizing the effect of each variable that governs the phenomenon.The objective of the present work was to propose a methodological approach to be able to evaluate in an isolated way, but under a holistic view, the influence of the factors involved in the generation of residual stresses and then to make the own experimental evaluation of the same through the Diffraction of X-ray (XRD). Initially, a diagram was proposed to classify the factors that influence the generation of thermal stress at different levels (primary and secondary effects). Then, an original methodology to evaluate the influence of primary factors (heated metal volume and metallurgical transformation) on the generation of residual stresses was applied and evaluated. The whole process of measuring residual stresses by XRD was also systematically evaluated and a series of recommendations were proposed.The proposed methodology showed to be able to demonstrate that the welding energy is not a primary parameter, that is, able to govern directly the generation of residual stresses in steel evaluated. The systematic evaluation of the process of measurement of residual stresses by XRD has shown that it is necessary to quantify the previous state of the RT contained in the sheet before welding to obtain more reliable results, but this approach should only be done in regions where the metal heating is below its metallurgical transformation. In addition, it has been shown that sheet restraint influences the temporal evolution of residual stresses and that it is good practice to use a rigid fixation to ensure the quality of the results.

show abstract

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

Cited by 17 publications

References 5 publications

Influence of Interlayer Temperature and Welding Sequence on the Temperature Distribution and Welding Residual Stress of the Saddle-Shaped Joint of Weldolet-Header Butt Welding

Influence of Interlayer Temperature and Welding Sequence on the Temperature Distribution and Welding Residual Stress of the Saddle-Shaped Joint of Weldolet-Header Butt Welding

Microstructural Characterization and Mechanical Properties of Electron Beam Welded Joint of High Strength Steel Grade S690QL

Uma visão holística da geração de tensões residuais em soldagem a arco e da medição por difração de raio X

Contact Info

Product

Resources

About