Nuclear Engineering and Technology

  • 제50권1호
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  • Pages.116-125
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  • 2018
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Tensile and impact toughness properties of various regions of dissimilar joints of nuclear grade steels

  • Karthick, K. (Department of Manufacturing Engineering, Faculty of Engineering and Technology, Annamalai University) ;
  • Malarvizhi, S. (Department of Manufacturing Engineering, Faculty of Engineering and Technology, Annamalai University) ;
  • Balasubramanian, V. (Department of Manufacturing Engineering, Faculty of Engineering and Technology, Annamalai University) ;
  • Krishnan, S.A. (Materials Technology Division, Homi Bhabha National Institute (HBNI), Indira Gandhi Centre for Atomic Research (IGCAR)) ;
  • Sasikala, G. (Materials Technology Division, Indira Gandhi Centre for Atomic Research (IGCAR)) ;
  • Albert, Shaju K. (Materials Technology Division, Indira Gandhi Centre for Atomic Research (IGCAR))
  • 투고 : 2017.06.26
  • 심사 : 2017.10.05
  • 발행 : 2018.02.25
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초록

Modified 9Cr-1Mo ferritic steel is a preferred material for steam generators in nuclear power plants for their creep strength and good corrosion resistance. Austenitic stainless steels, such as type 316LN, are used in the high temperature segments such as reactor pressure vessels and primary piping systems. So, the dissimilar joints between these materials are inevitable. In this investigation, dissimilar joints were fabricated by the Shielded Metal Arc Welding (SMAW) process with Inconel 82/182 filler metals. The notch tensile properties and Charpy V-notch impact toughness properties of various regions of dissimilar metal weld joints (DMWJs) were evaluated as per the standards. The microhardness distribution across the DMWJs was recorded. Microstructural features of different regions were characterized by optical and scanning electron microscopy. Inhomogeneous notch tensile properties were observed across the DMWJs. Impact toughness values of various regions of the DMWJs were slightly higher than the prescribed value. Formation of a carbon-enriched hard zone at the interface between the ferritic steel and the buttering material enhanced the notch tensile properties of the heat-affected-zone (HAZ) of P91. The complex microstructure developed at the interfaces of the DMWJs was the reason for inhomogeneous mechanical properties.

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피인용 문헌

  1. Ageing Effects on Room-Temperature Tensile Properties and Fracture Behavior of Quenched and Tempered T92/TP316H Dissimilar Welded Joints with Ni-Based Weld Metal vol.8, pp.10, 2018, https://doi.org/10.3390/met8100791
  2. The Effects of Electrochemical Hydrogen Charging on Room-Temperature Tensile Properties of T92/TP316H Dissimilar Weldments in Quenched-and-Tempered and Thermally-Aged Conditions vol.9, pp.8, 2018, https://doi.org/10.3390/met9080864
  3. Effect of substituting fine rutile of the flux with nano TiO2 on the improvement of mass transfer efficiency and the reduction of welding fumes in the stainless steel SMAW electrode vol.39, pp.1, 2020, https://doi.org/10.1515/htmp-2020-0030
  4. Effect of substituting fine rutile of the flux with nano TiO2 on the improvement of mass transfer efficiency and the reduction of welding fumes in the stainless steel SMAW electrode vol.39, pp.1, 2020, https://doi.org/10.1515/htmp-2020-0030
  5. Mechanical and Metallurgical Characterization of Dissimilar P92/SS304 L Welded Joints Under Varying Heat Treatment Regimes vol.51, pp.5, 2018, https://doi.org/10.1007/s11661-020-05660-0
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