Comparison of residual stress induced by TIG and LBW in girth weld of AISI 304 stainless steel pipes

Xu, Jijin; Chen, Jingyao; Duan, Yi; Yu, Chun; Chen, Junmei; Lü, Hao

doi:10.1016/j.jmatprotec.2017.05.014

Cited by 49 publications

(14 citation statements)

References 18 publications

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“…This reflects in more filling passes. Xu et al [25] also preferred a V bevel in a mechanized procedure, but with a 1.5 mm (0.06 in) root face and 13.2 cm/min (5.2 in/min) welding speed, which is still considerably lower than the welding speed used in our welding experiment. Finally, Batista et al [26] executed a manual MIG/MAG procedure with a short-circuiting transfer mode.…”

Section: Resultsmentioning

confidence: 78%

Performing higher speeds with dynamic feeding gas tungsten arc welding (GTAW) for pipeline applications

Silva

Paes

Marques

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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Most of pipeline welding still applies manual procedures, which increase production time and is stressful to the welding operator. This happens mainly due to the accurate melt pool control that hand operation enables. It yields high flexibility between material addition and heat source and is therefore adaptable to the welding condition and situation of each moment. This feature is not fully found when mechanized welding with automatic feeding is performed, despite every benefit of welding automation. This renders an optimized parameterization of a complex task. Automatic orbital welding is already a reality, though only applied in large scale in developed countries and/or by few expert companies from developed countries, due to such controllability, repeatability, and robustness difficulties. In this paper, a concept for dynamic wire feeding and respective implementation and analysis are presented. It consists of a low-frequency wire speed oscillation, aiming to decouple wire speed and arc power to a larger extent, which approaches to manual procedure as it guarantees user flexibility, but still keeping the benefits of welding automation. ASTM 139 Grade D tubes were welded under stable processing conditions. The macrographs did not indicate discontinuities such as porosity or lack of fusion, resulting in complete joint penetration. The average welding speed reached was 27.8 cm/min (10.9 in/min), much higher than that found by other authors.

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Section: Resultsmentioning

confidence: 78%

Performing higher speeds with dynamic feeding gas tungsten arc welding (GTAW) for pipeline applications

Silva

Paes

Marques

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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“…10(b), the absolute values of tensile stresses in the FZ and HAZ on the inner surface are significantly larger than those of the compressive stresses in the girth welding region and its vicinity on the outer surface. The magnitudes of residual axial stresses have a significant influence on the value of residual hoop stresses [20]. The ranges of reversal stresses on the inner and outer surface are somewhat close to each other.…”

Section: Structural Response In Case Amentioning

confidence: 68%

A parametric study of thermal and residual stress fields in lined pipe welding

Obeid

Alfano

Bahai

et al. 2017

Thermal Science and Engineering Progress

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Welded lined cylindrical structures such as boilers, pressure vessels and transportation pipes are widely used in the oil and gas industries because an inexpensive outer layer is protected from corrosion by a thinner expensive layer, which is made of a corrosion resistant alloy (CRA). Welding in the lined pipe is of two different types, where the first one, so called weld overlay (lap-weld), is deployed to seal the liner with the outer pipe whilst the other one, known as girth welding (butt-weld), is deposited to join two specimens of lined pipe together. Therefore, the precise prediction of the thermal and residual stress fields due to the combination of two different types of circumferential welding is a major concern regarding welded lined pipes to avoid sudden failure during service. Six parametric studies have been conducted primarily to examine the influence of welding properties (weld overlay and girth welding materials), geometric parameters (weld overlay and liner) and welding process parameters (heat input) on the thermal and residual stress fields. All predicted results obtained from a 3-D FE model based on the ABAQUS code are validated against small-scale experimental results. Furthermore, in this study, the effect of mesh size has been investigated.

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“…Baja tahan karat jenis 304 banyak digunakan untuk berbagai aplikasi seperti untuk penampungan dan juga banyak digunakan dalam Pembangkit Listrik Tenaga Nuklir karena baja tahan karat jenis 304 memiliki ketahanan korosi paling baik dan juga kuat untuk penggunaan di temperatur yang tinggi [2]. Baja tahan karat 304 juga cenderung murah dibandingkan dengan jenis lainnya.…”

Section: Pendahuluanunclassified

“…Baja tahan karat 304 juga cenderung murah dibandingkan dengan jenis lainnya. Namun baja tahan karat 304 ini merupakan jenis austenitic dimana memiliki karakteristik koefisien ekspansi termal yang lebih tinggi dan konduktivitas termal yang lebih rendah dibandingkan dengan baja karbon maupun baja paduan, sehingga setelah dilakukan proses pengelasan pada baja tahan karat ini, dapat terjadi sejumlah besar distorsi, penyusutan, dan juga tegangan sisa [3].…”

Section: Pendahuluanunclassified

Analisis pengaruh arus pengerasan dan kecepatan pengelasan terhadap lebar manik las dan distorsi pada pengelasan gas metal arc welding (GMAW) dengan sambungan tumpul SS 304

Baskoro

Prasetya

Widyianto

2019

JTMI

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Pada kajian ini pengaruh dari arus pengelasan dan kecepatan pengelasan terhadap lebar manik las dan distorsi pada pengelasan gas metal arc welding (GMAW) sambungan tumpul SS 304 telah dilakukan. Bahan yang digunakan dalam kajian ini adalah baja tahan karat tipe 304 (SS 304) dengan konfigurasi sambungan tumpul. Variasi parameter pengelasan GMAW yang digunakan adalah arus pengelasan dan kecepatan pengelasan. Kecepatan pengelasan yang digunakan adalah 115 A, 120 A dan 125 A, sedangkan kecepatan pengelasan yang digunakan adalah 3,6 mm/s, 3,9 mm/s dan 4,2 mm/s. Hasil dari pengelasan akan dianalisis dari lebar manik las dan distorsi yang terjadi. Lebar manik las dan distorsi diukur menggunakan Dino-Lite dan Coordinate Machine Measure (CMM). Metode perpindahan vertikal rata-rata digunakan untuk menghitung distorsi longitudinal bending dan distorsi angular. Hasilnya menunjukkan bahwa menaikan arus pengelasan akan meningkatkan lebar manik las dan distorsi, tetapi jika menaikkan kecepatan pengelasan akan menurunkan lebar manik las dan distorsi. Pada parameter pengelasan 125 A dan 3,6 mm/s menghasilkan lebar manik las atas dan bawah yang terbesar 8,062 mm dan 4,984 mm. Distorsi longitudinal bending dan distorsi angular yang terbesar adalah 1,748 mm dan 4,076 derajat pada parameter pengelasan 125 A dan 3,6 mm/s.

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Comparison of residual stress induced by TIG and LBW in girth weld of AISI 304 stainless steel pipes

Cited by 49 publications

References 18 publications

Performing higher speeds with dynamic feeding gas tungsten arc welding (GTAW) for pipeline applications

Performing higher speeds with dynamic feeding gas tungsten arc welding (GTAW) for pipeline applications

A parametric study of thermal and residual stress fields in lined pipe welding

Analisis pengaruh arus pengerasan dan kecepatan pengelasan terhadap lebar manik las dan distorsi pada pengelasan gas metal arc welding (GMAW) dengan sambungan tumpul SS 304

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