Analysis of residual stresses and variation mechanism in dissimilar girth welded joints between tubular structures and steel castings

Xia, Jie; Jin, Hui

doi:10.1016/j.ijpvp.2018.06.003

Cited by 17 publications

(5 citation statements)

References 31 publications

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“…They reported that the inclusion of the Zn interlayer controlled the generation of Mg-Al intermetallic. Xia and Jin (2018) analysed the residual stresses and variation mechanism in dissimilar girth welded joints between tubular structures and steel castings fabricated by stir casting techniques. Ponappa et al (2012) reinforced magnesium and magnesium alloy with yttrium particles via two step stir casting.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

Butola

Yuvaraj

Singh

et al. 2021

WJE

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Purpose This study aims to analyse the changes in mechanical and wear performance of aluminium alloy when yttrium oxide particles are incorporated. The microstructures are studied to analyse the change in the grain structures. Worn surfaces are observed via scanning electron microscope to study the wear mechanism in detail. Design/methodology/approach Stir casting is used to incorporate varying composition of yttrium particles, having an average particle size of 25 micrometer, in aluminium alloy 6063 matrix. Wear testing is carried out by DUCOM manufactured high temperature rotatory tribometer, and an indentation test is used for analysing the microhardness of the fabricated samples. Findings Microhardness of the material is increased with the increasing content of particulate addition. With the increasing content of reinforcement, more refined grains are produced. The load is transferred from the matrix to more rigid yttrium oxide particles. These factors contributed to escalated microhardness of the reinforced samples. Particulate addition enhanced the wear performance of the material; this might be attributed to increased microhardness and formation of an oxide layer. Originality/value Aluminium composites are finding wide applications in various industries, and there is always a requirement of material with enhanced tribological properties. Yttrium oxide particles exhibit improved mechanical properties, and their interaction with the aluminium matrix has not been studied much in the past. So, in this work, yttrium oxide incorporated aluminium matrix is studied.

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Section: Introductionmentioning

confidence: 99%

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

Butola

Yuvaraj

Singh

et al. 2021

WJE

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“…The utilization of circular cross-sectional cast steel connections enhances the mechanical characteristics and aesthetic appeal of the junctions in cylindrical steel frameworks, while also enhancing the overall structural integrity and dependability [1][2][3]. The weld between the main circular section structure and the cast steel has become the key position that affects structural safety awareness.…”

Section: Introductionmentioning

confidence: 99%

Analysis of crack propagation of annular butt weld and distribution of weld-induced residual stress

Zhu,

Xia,

Jin

2024

J. Phys.: Conf. Ser.

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The circumferential surface crack propagation and the effect of weld-induced residual stress were analyzed to comprehensively understand the mechanical behavior and fracture resistance of dissimilar girth welded joints of steel castings. The evaluation of stress intensity factors is conducted for circumferential cracks on internal surfaces, aiming to predict the fracture toughness of dissimilar welded joints. The distribution of weld-induced residual stress is obtained by thermal elastic-plastic finite element methods. The impact of residual stress on the propagation of cracks is investigated through the application of extended finite element theory. The high-stress intensity factors were found in such dissimilar welded joints due to the local bending and distortion caused by the asymmetrical weld geometry. The tensile residual stress and distortion were applied to the weld root area and its vicinity. Both the asymmetrical weld geometry and tensile residual stress contribute to the tensile distortion of the inner surface around the weld root, and enable the growth of internal surface cracks in the circumferential direction and radially from inside out of the welded joint. The fracture resistance decreases with the simultaneous influence of residual stress and welds’ asymmetry.

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“…17 Many studies have been carried out, and it has been discovered that a substantial variation in TEC causes a high-stress gradient in the fusion zone. 2 The existence of a significant quantity of residual stress impairs the performance of the welded structure, thus it must be reduced. Residual stresses may reduce with time but they might shorten the component's life expectancy under creep conditions.…”

Section: Introductionmentioning

confidence: 99%

“…It is commonly used to fabricate various structural components owing to its high resistance to both creep and corrosion at extreme temperature, as well as its low thermal expansion coefficient (TEC). 2 The structural components like the turbine rotors, reactor internals, hot gas ducts, piping, and intermediate heat exchanger tubes are designed to be operated under relatively high temperature of 700°C and pressure of 30 MPa in the steam turbines of the AUSC power plants. The fabrication of these structural components is always done by multi-pass welding and the quality of the weld is largely responsible for their safe functioning and service life.…”

Section: Introductionmentioning

confidence: 99%

Residual stresses study in butt welded joint of Inconel 617 alloy and effect of post weld heat treatment on residual stresses

Kumar

Dey

Pradhan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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Distribution of weld-induced residual stress plays a significant effect on the service life of a welded component. The accumulation of high residual stress accelerates the crack propagation even if the crack is of microscopic level, reducing the service life of the welded component. Prior understanding of residual stress distribution can aid in the design of a component with an adequate factor of safety and reduce the probability of failure. In the present study, two separate circumferential butt welded pipes were fabricated using Alloy 617 and then subjected to post weld heat treatment) at 720°C and 980°C. The deep hole drilling method was used to measure the distribution of residual stress. The fabrication of the welded joint was done using the hot-wire TIG welding process. High welding speeds are possible with hot-wire tungsten inert gas (TIG) welding because it uses less heat than conventional TIG welding. Using hot-wire TIG welding, the welded joint's mechanical properties, such as hardness, are improved in addition to its metallurgical properties. The computational approach is provided to analyze temperature and residual stress fields in multi-pass TIG welds with different passes. Based on ABAQUS FEA software, a coupled thermomechanical computational approach was developed to analyze the residual stress distribution on the welded joint. A 3D finite element model for Alloy 617 tube was created to estimate the welding stress field in two separate multi-pass welded joints. Mixed hardening model (kinematic and isotropic) was used during the numerical analysis. The effectiveness of the computational approach was verified with experimental measurements. The magnitude of hoop and axial residual stresses were observed to be maximum at a depth of 6 mm from the upper surface. The stress gradient in the welded zone and heat-affected zone is dramatically reduced by 70–80% of the as-welded condition during the post weld heat treatment at 980°C.

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Analysis of residual stresses and variation mechanism in dissimilar girth welded joints between tubular structures and steel castings

Cited by 17 publications

References 31 publications

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

Evaluation of microhardness and wear properties of Al 6063 composite reinforced with yttrium oxide using stir casting process

Analysis of crack propagation of annular butt weld and distribution of weld-induced residual stress

Residual stresses study in butt welded joint of Inconel 617 alloy and effect of post weld heat treatment on residual stresses

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