Residual stress characterization in low transformation temperature 13%Cr–4%Ni stainless steel weld by neutron diffraction and the contour method

Thibault, Denis; Bocher, Philippe; Thomas, Marc; Gharghouri, Michael A.; Côté, Marjolaine

doi:10.1016/j.msea.2010.06.035

Cited by 85 publications

(52 citation statements)

References 20 publications

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“…However, most studies have been conducted on flat plate samples such as butt welded joints and bead on plate welds. To validate the contour results, most of these aforementioned studies have reported additional results measured by neutron and synchrotron Xray diffraction and particularly good agreement has been reported, such as by Thibault et al [14] for stainless steel welded plates. There are examples in the literature where the contour method has been applied to assess more complicated welded pipe samples, most recently by Hosseinzadeh and Bouchard [15].…”

Section: Introductionmentioning

confidence: 63%

The effect of the weld fusion zone shape on residual stress in submerged arc welding

Ishigami¹,

Roy

Walsh

et al. 2016

Int J Adv Manuf Technol

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A new multiple-electrode submerged arc welding technique has been developed that imparts improved fracture toughness properties in the heat affected zone, produces a narrower weld bead geometry, and can also be employed with lower heat inputs than conventional SAW. This study examines how the difference in the weld fusion zone profile affects residual stresses for weldments of API X70 steel made using the same consumable, heat input and restraint, varying only the shape of the weld fusion zone. The contour method and neutron diffraction have been employed to map and compare longitudinal and transverse residual stresses. Results show peak longitudinal stresses in the weld are within 50 MPa for both, and this is believed to be because they have the same heat input and hence similar heat affected zone size. By contrast, the peak stress in the transverse direction is 120 MPa lower for the new SAW technique. The reduction in transverse stress is attributed to a narrower fusion zone profile. The new SAW technique opens up the possibility of producing high quality narrower welds with lower heat input which could lead to significant reductions in residual stress.

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Section: Introductionmentioning

confidence: 63%

The effect of the weld fusion zone shape on residual stress in submerged arc welding

Ishigami¹,

Roy

Walsh

et al. 2016

Int J Adv Manuf Technol

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“…Média dos ciclos de fadiga bem como desvio padrão (SD) obtidos para as condições de refusão e material base conforme tensões utilizadas. A pouca diferença de desempenho em favor do material refundido estaria associada, em parte, à presença de tensões residuais compressivas decorrentes da transformação martensítica [8][9][10][11] após solidificação e resfriamento as quais minimizam as tensões na superfície impostas durante o ensaio. Este desempenho também foi observado no trabalho de Heitkemper et al, [12] ao realizar tratamento térmico com LASER em aços inoxidáveis martensíticos para ferramentas.…”

Section: Resultados E Discussõesunclassified

Microestrutura e resistência à fadiga de um aço inoxidável martensítico macio refundido por tocha plasma

et al. 2014

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ResumoEste trabalho teve como objetivo avaliar o efeito produzido pela refusão superficial por meio de uma tocha plasma na resistência à fadiga de um aço inoxidável martensítico macio utilizado na fabricação de rotores de IntroduçãoA falha de componentes de engenharia é quase sempre um evento indesejável por diversos motivos que incluem vidas humanas colocadas em risco, perdas econômicas e a interferência com a disponibilidade de produtos e serviços. Dentre os diferentes modos de falha, a falha por fadiga representa aproximadamente entre 50 a 90 % de todas as falhas dos materiais metálicos [1].Melhorar a resistência à fadiga dos componentes, em grande parte das vezes, envolve a realização de tratamentos superficiais os quais resultem num aumento da resistência e também na criação de tensões residuais de compressão nesta região [2]. Uma forma de obtenção envolve a realização da fusão superficial onde por meio de transformações, seja esta durante a solidificação (refino da granulação) ou de estado sólido (formação de martensita), têm-se a expectativa de melhora nas propriedades voltadas ao desempenho à fadiga.Dentre as diferentes formas de promover a fusão superficial, pode-se destacar o uso do arco elétrico. Desde que protegido por uma atmosfera inerte e por meio do controle adequado dos parâmetros empregados em soldagem, é possível a obtenção de um tratamento superficial similar a um depósito de solda, porém, sem a necessidade de utilização de um metal de adição [3].Baseado nesta teoria, o uso da tocha empregada na soldagem plasma, constitui uma alternativa interessante. Devido às características intrínsecas deste processo, o mesmo possibilita a refusão de forma eficiente permitindo ainda o uso de variações (ex. corrente pulsada) que possam resultar em melhorias frente ao desempenho à fadiga.Com relação aos componentes que falham por fadiga, os rotores de turbinas hidráulicas de geradores elétricos, fabricados

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“…CM has found a number of applications; some of them are of particular relevance such as butt joints of S355 structural steel [28], 80-mm thick ferritic steel welds [24], 70-mm thick dissimilar metal (ferritic to austenitic) welds [15] and ferritic steel plates welded using low and very high heat input processes [25], friction stir welds between 25.4-mm thick plates of aluminum alloys 7050-T7451 and 2024-T351 [29], 2024-T351 aluminum alloy VPPA welds [19], welded Tee-joints [22], welds of 13% Cr-4% Ni steel [30,31], 316L stainless steel bead-on-plate specimens [32] and AA6061-T6 aluminum alloy friction stir butt welds [33].…”

Section: Residual Stress Analysis On Welded Joints By Means Of Numerimentioning

confidence: 99%

“…So, a lot of research work was done for the evaluation of residual stress in different kinds of welding processes and materials [30,31,[40][41][42][43][44][45] with the final target to find the correct welding parameters and post processing conditions to minimize the residual stress. Some of these works use HDM as validation of nondestructive techniques such as ultrasonic [41][42][43][44][45][46], XRD [30] and neutron diffraction [31]. Pappalettere et al [47][48][49][50][51][52] applied an electronic speckle pattern interferometry (ESPI) method to avoid the use of conventional rosette strain gauges.…”

Section: Orthogonality and Zeroingmentioning

confidence: 99%

Experimental Techniques to Investigate Residual Stress in Joints

Montanari¹,

Fava²,

Barbieri³

2018

Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments

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Residual stress arising from welding processes is matter of great concern in industrial practice since it can affect geometry, mechanical behavior and corrosion resistance of components. In order to evaluate residual stress in welded joints and optimize postwelding heat treatments, a lot of work has been devoted to the improvement of measurement methods with increasing sensitivity and accuracy. The chapter presents and discusses some of the experimental techniques commonly used today to determine residual stress in welds and describes recent results and advancements. Destructive (sectioning, contour, hole-drilling, instrumented indentation) and nondestructive (Barkhausen noise, ultrasonic, X-ray and neutron diffraction) methods are illustrated to highlight the specific characteristics, advantages and drawbacks.

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Residual stress characterization in low transformation temperature 13%Cr–4%Ni stainless steel weld by neutron diffraction and the contour method

Cited by 85 publications

References 20 publications

The effect of the weld fusion zone shape on residual stress in submerged arc welding

The effect of the weld fusion zone shape on residual stress in submerged arc welding

Microestrutura e resistência à fadiga de um aço inoxidável martensítico macio refundido por tocha plasma

Experimental Techniques to Investigate Residual Stress in Joints

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