Incorporating aged martensite model in residual stress prediction of ferritic steels girth weld

Darmadi, B Djarot

doi:10.5937/fmet1904901d

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…As stated in [25] the mathematical model was developed using MATLAB tool to further predict the temperature distribution and total stress concentration at any localized nodal point. The model can be used to obtain optimal weld parameters such as weld, speed torch temperature, current and voltage.The residual stress was predicted through a model of the multi-pass girth weld joint using Finite Element Method (FEM) [26,27].…”

Section: Management Methods For Quality Evaluation Of the Weld Jointsmentioning

confidence: 99%

Quality evaluation of welding joints by different methods

Ťavodová¹,

Náprstková²,

Hnilicová³

et al. 2020

FME Transactions

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This paper presents the results of the quality evaluation of the weld joints on welded pipes used in industrial energy. The quality evaluation of the weld joints was performed by two methods. Using technical methods, welding faults and defects were examined, identified and evaluated by a metallographic analysis on the macrostructure of welds. According to ISO 6520-1:2007, the faults and defects were detected and classified into the group and classified into quality levels using ISO 5817:2008-03. Two quality management tools using a Cause and effect diagram - Iskihawa diagram and a Pareto diagram also evaluated the quality control of welds. These two tools enabled to identify the causes of welding defects as well as to determine the frequency of their occurrence and to identify the most serious welding faults and defects. Both methods - technical and management, should reveal shortcomings in both technical, technological and personnel aspect. Their use should contribute to improving the welding process of pipes in operation and to increasing the safety of piping systems.

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Section: Management Methods For Quality Evaluation Of the Weld Jointsmentioning

confidence: 99%

Quality evaluation of welding joints by different methods

Ťavodová¹,

Náprstková²,

Hnilicová³

et al. 2020

FME Transactions

View full text Add to dashboard Cite

show abstract

“…When performing operations such as pipe welding, it is essential to use methods for assessing the quality of welded pipelines [7,8] and new technologies [9] and equipment for in-line inspection of pipelines that serve mobile technological modules. A promising direction for creating these modules can be the walking mechanisms of robots [10,11], which increase adhesion to the internal surfaces of pipelines.…”

Section: Prerequisites and Means For Solving The Problemmentioning

confidence: 99%

“…We substitute expression (11) for stresses into equation (8). At the same time, we consider that the stress distribution is symmetrical concerning the Ox axis, and then we replace the double integral with three single integrals (13):…”

Section: Figure 7 Elastic Chamber (¼ Section) In the Shape Of A Torus...mentioning

confidence: 99%

Mobile technology module for pipeline maintenance: Design and simulation

Polishchuk¹,

Yahlinskyi²

2022

FME Transactions

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Modern pipeline communications require periodic maintenance for various purposes, such as gas, oil, water station pipes, chimneys, and other pipelines. Such maintenance involves transport devices that operate autonomously inside pipelines, including in vertical tubes, and perform various technological operations, such as diagnosing the internal state of pipes, cleaning them, applying protective coatings, machining, welding, and the like processes. The article proposes a fundamentally new design of a mobile technological module for servicing the internal surfaces of pipelines. The main advantage of the proposed module is its ability to move along vertical pipelines of various diameters while overcoming the gravitational load. This effect is achieved by using elastic chambers in the module design. When compressed air or pressurized liquid is supplied to them, they periodically fix the module on the internal surfaces of the pipelines. The main economic effect is to reduce the cost of preventive maintenance to maintain the interior surfaces of vertical pipelines, that is, without their dismantling and with the simultaneous possibility of adapting transport devices to the pipeline topology. The article offers a description of the new design of the technological module and analytical dependencies for calculating the design parameters of the module. The results of modeling the parameters of the module are presented.

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Prediction and experimental research of abrasive belt grinding residual stress for titanium alloy based on analytical method

Xiao

Song

et al. 2021

Int J Adv Manuf Technol

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Incorporating aged martensite model in residual stress prediction of ferritic steels girth weld

Cited by 3 publications

References 16 publications

Quality evaluation of welding joints by different methods

Quality evaluation of welding joints by different methods

Mobile technology module for pipeline maintenance: Design and simulation

Prediction and experimental research of abrasive belt grinding residual stress for titanium alloy based on analytical method

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