Effect of Laser Beam Welding Parameters on Microstructure and Properties of Duplex Stainless Steel

El-Batahgy, Abdel-Monem; Khourshid, Abdel-Fattah; Sharef, Thoria

doi:10.4236/msa.2011.210195

Cited by 27 publications

(24 citation statements)

References 14 publications

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“…El-Batahgy et al [89] studied the influence of laser welding parameters (simultaneous heat inputs and shielding gas) on the corrosion resistance of autogenously bead-on plates; their results affirmed that the corrosion average of plates combined contracts with the rise in welding speed, indicating the drop in heat input. This effect of heat input can be justified by the cooling time [21,90].…”

Section: Pitting Corrosionmentioning

confidence: 99%

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Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

105

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Abstract:The effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed. Austenitic stainless steel (ASS) is welded using low-heat inputs. However, owing to differences in the physical metallurgy between ASS and DSS, low-heat inputs should be avoided for DSS. This review highlights the differences in solidification mode and transformation characteristics between ASS and DSS with regard to the heat input in welding processes. Specifically, many studies about the effects of heat energy input in welding process on the pitting corrosion, intergranular stress, stress-corrosion cracking, and mechanical properties of weldments of DSS are reviewed.

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Section: Pitting Corrosionmentioning

confidence: 99%

“…The ferrite content of DSS can considerably influence the yield strength, tensile ductility, and toughness of the alloy [89,97,112,132]. As such, it further assumed that the heat input will manipulate these properties in a welded part because the austenite-to-ferrite stability is related to the cooling rate [133].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

105

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“…Conversely, the microstructure at the position closer to the 2205 stainless steel was improved and additionally subtle than the initial dual phase assembly of the 2205 SS. A superior cooling rate is considered responsible for this behavior in laser welding [39,62,63]. Figure 10b showed the microstructures in the fusion zone (FZ), and at the boundary between the FZ and the base metals (point "b" in Figure 9).…”

Section: Metallography and Visual Examinationmentioning

confidence: 99%

Fiber Laser Welding of Dissimilar 2205/304 Stainless Steel Plates

Mohammed

Ishak

Ahmad

et al. 2017

Metals

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Abstract:In this study, an attempt on pulsed-fiber laser welding on an austenitic-duplex stainless steel butt joint configuration was investigated. The influence of various welding parameters, such as beam diameter, peak power, pulse repetition rate, and pulse width on the weld beads geometry was studied by checking the width and depth of the welds after each round of welding parameters combination. The weld bead dimensions and microstructural progression of the weld joints were observed microscopically. Finally, the full penetration specimens were subjected to tensile tests, which were coupled with the analysis of the fracture surfaces. From the results, combination of the selected weld parameters resulted in robust weldments with similar features to those of duplex and austenitic weld metals. The weld depth and width were found to increase proportionally to the laser power. Furthermore, the weld bead geometry was found to be positively affected by the pulse width. Microstructural studies revealed the presence of dendritic and fine grain structures within the weld zone at low peak power, while ferritic microstructures were found on the sides of the weld metal near the SS 304 and austenitic-ferritic microstructure beside the duplex 2205 boundary. Regarding the micro-hardness tests, there was an improvement when compared to the hardness of duplex and austenitic stainless steels base metals. Additionally, the tensile strength of the fiber laser welded joints was found to be higher when compared to the tensile strength of the base metals (duplex and austenitic) in all of the joints.

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“…Para um feixe de diâme-tro constante, a penetração aumenta à medida que a potência do feixe também é aumentada, o que é relatado em diversos trabalhos [10,20,21,22], sendo que a penetração aumenta de maneira aproximadamente linear com a potência do laser incidente [23,24]. Além disso, pode-se controlar a velocidade e a potência para estabelecer uma potência efetivamente disponibilizada adequada para cada situação, pois ambos os parâmetros afetam a profundidade, o primeiro inversamente e o segundo diretamente; igualmente para o ajuste da largura do cordão de solda, utilizado em situações que exijam esse tipo de controle.…”

Section: Figura 12unclassified

“…Essas correlações são fisicamente consistentes e seguem padrões validados em trabalhos de outros autores [10,21,22,23].…”

Section: Conclusõesunclassified

Soldagem do aço inoxidável AISI 316 com laser à fibra de alta potência: influência dos parâmetros operacionais na micro dureza e na susceptibilidade à corrosão eletrolítica dos cordões de solda

2013

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Soldagem do aço inoxidável AISI 316 com laser à fibra de alta potência: influência dos parâmetros operacionais na micro dureza e na susceptibilidade à corrosão eletrolítica dos cordões de solda Welding of the stainless steel AISI 316 with high power fiber laser: influence of the operational parameters on microhardness and electrolytic corrosion susceptibility of the weld beads RESUMOEste trabalho faz uma avaliação da influência de parâmetros operacionais utilizados no processo de soldagem a laser do aço inoxidável AISI 316. Os resultados dos experimentos de soldagem realizados com parâmetros ajustados para diversas situações foram avaliados levando em consideração a densidade de potência disponibilizada e o tempo de interação do feixe com o metal base. Essas avaliações foram baseadas nos resultados de microdureza e nos ensaios de corrosão eletrolítica das soldas, auxiliadas pela macrografia do cordão de solda. Buscou-se evidenciar correlações entre os parâmetros operacionais selecionados para os experimentos e os resultados obtidos nos cordões de solda, medindo-se grandezas como largura e profundidade. Concluiu-se que a escolha adequada dos parâmetros operacionais é fundamental para a garantia da qualidade dos cordões de solda. Além disso, validou-se um método rápido de avaliação da susceptibilidade dos cordões de solda à corrosão.Palavras-chave: soldagem a laser, aço AISI 316, laser à fibra, corrosão eletrolítica. ABSTRACTThis paper addresses an evaluation of the influence of operational parameters used in the AISI 316 stainless steels laser welding process. The results of the welding experiments performed with parameters adjusted to a variety of situations were evaluated taking into account the power density available and the interaction time of the laser beam with the base metal. These evaluations were based on the results of microhardness and the electrolytic corrosion tests of the solders, assisted by the macrography of the weld bead. It was sought to emphasize correlations between selected operating parameters and the results obtained with weld beads, measuring their width and depth. It was concluded that the proper choice of operating parameters is fundamental to the guarantee of quality of the weld beads. Besides that, a quick method of evaluation of weld beads susceptibility was validated.

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Effect of Laser Beam Welding Parameters on Microstructure and Properties of Duplex Stainless Steel

Abstract: ABSTRACT

Cited by 27 publications

References 14 publications

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Fiber Laser Welding of Dissimilar 2205/304 Stainless Steel Plates

Soldagem do aço inoxidável AISI 316 com laser à fibra de alta potência: influência dos parâmetros operacionais na micro dureza e na susceptibilidade à corrosão eletrolítica dos cordões de solda

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