CHARACTERIZATION OF MICRO STRUCTURAL AND MECHANICAL PROPERTIES OF INCONEL 625/A 517 HIGH STRENGTH QUENCHED AND TEMPERED STEEL DISSIMILAR WELDS

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RAMEZANI HADI; AKBARI MOUSAVI SEYED ALI ASGHAR

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:15 Page(s): 331-336

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Title

CHARACTERIZATION OF MICRO STRUCTURAL AND MECHANICAL PROPERTIES OF INCONEL 625/A 517 HIGH STRENGTH QUENCHED AND TEMPERED STEEL DISSIMILAR WELDS

Author(s)

RAMEZANI HADI | AKBARI MOUSAVI SEYED ALI ASGHAR | Issue Writer Certificate

Keywords

INCONEL 625Q2

HIGH STRENGTH QUENCHED AND TEMPERED STEELQ2

LBWQ1

MECHANICAL PROPERTIESQ1

CORROSION PROPERTIESQ2

Abstract

Dissimilar welding between INCONEL 625 nickel base super alloy and high strength quenched and tempered A 517 Gr.B steel was investigated by pulsed ND: YAG laser beam welding equipment. This joint has special application in submarine components. After welding, the optimized joint microstructure including the weld metal and heat affected zones were characterized by optical and scanning electron microscopy (SEM). The results showed a fine dendritic structure and existence of large amount of Niobium carbide and Laves eutectic phase in the weld metal. Energy-dispersive X-ray spectroscopy (EDS) analysis showed Nb and Mo segregation to interdendritic zones at the weld metal. Grain growth in the heat affected zone of INCONEL 625 did not occur, however, ultrafine precipitations were deposited at the heat affected zone. An approximately 65 mm wide transition zone was observed at the steel and weld zone interface; consisting of a martensitic layer (10-20mm) along the weld interface and the austenite phase region with a small amount of ferrite adjacent to the base metal. The tensile test and micro hardness test of the optimized sample was investigated. The electrochemical behavior of the weld metal was investigated at room temperature in 3.5% NaCl solution using potentiodynamic polarization. The results show that the corrosion resistance of weld metal is more than that of INCONEL 625 and less than that of 517A Gr.B. It can be concluded that a proper selection of laser beam welding parameters provides sound, fully-penetrated welds.

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APA: Copy

RAMEZANI, HADI, & AKBARI MOUSAVI, SEYED ALI ASGHAR. (2015). CHARACTERIZATION OF MICRO STRUCTURAL AND MECHANICAL PROPERTIES OF INCONEL 625/A 517 HIGH STRENGTH QUENCHED AND TEMPERED STEEL DISSIMILAR WELDS. MODARES MECHANICAL ENGINEERING, 14(15), 331-336. SID. https://sid.ir/paper/177691/en

Vancouver: Copy

RAMEZANI HADI, AKBARI MOUSAVI SEYED ALI ASGHAR. CHARACTERIZATION OF MICRO STRUCTURAL AND MECHANICAL PROPERTIES OF INCONEL 625/A 517 HIGH STRENGTH QUENCHED AND TEMPERED STEEL DISSIMILAR WELDS. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(15):331-336. Available from: https://sid.ir/paper/177691/en

IEEE: Copy

HADI RAMEZANI, and SEYED ALI ASGHAR AKBARI MOUSAVI, “CHARACTERIZATION OF MICRO STRUCTURAL AND MECHANICAL PROPERTIES OF INCONEL 625/A 517 HIGH STRENGTH QUENCHED AND TEMPERED STEEL DISSIMILAR WELDS,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 15, pp. 331–336, 2015, [Online]. Available: https://sid.ir/paper/177691/en

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