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http://dx.doi.org/10.1016/j.net.2017.10.003

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))
Publication Information
Nuclear Engineering and Technology / v.50, no.1, 2018 , pp. 116-125 More about this Journal
Abstract
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.
Keywords
Austenitic Stainless Steel; Dissimilar Joint; Ferritic Steel; Impact Toughness; Shielded Metal Arc Welding; Tensile Properties;
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1 D. Samantaray, S. Mandal, A.K. Bhaduri, Constitutive analysis to predict hightemperature flow stress in modified 9Cr-1Mo (P91) steel, Mater. Des. 31 (2) (2010) 981-984, https://doi.org/10.1016/j.matdes.2009.08.012.   DOI
2 H.T. Wang, G.Z. Wang, F.Z. Xuan, C.J. Liu, S.T. Tu, Local mechanical properties of a dissimilar metal welded joint in nuclear power systems, Mater. Sci. Eng. A 568 (2013) 108-117, https://doi.org/10.1016/j.msea.2013.01.037.   DOI
3 ASTM E8/E8M-16a, Standard Test Methods for Tension Testing of Metallic Materials, ASTM International, West Conshohocken, PA, 2016. www.astm.org.
4 ASTM E23e16b, Standard Test Methods for Notched Bar Impact Testing of Metallic Materials, ASTM International, West Conshohocken, PA, 2016. www. astm.org.
5 C. Jang, J. Lee, J. Sung Kim, T. Eun Jin, Mechanical property variation within Inconel 82/182 dissimilar metal weld between low alloy steel and 316 stainless steel, Int. J. Pres. Ves. Pip. 85 (9) (2008) 635-646, https://doi.org/ 10.1016/j.ijpvp.2007.08.004.   DOI
6 P. Kumar, A. Pai, An overview of welding aspects and challenges during manufacture of intermediate heat exchangers for 500MWe prototype fast breeder reactor, Procedia Eng. 86 (Ic) (2014) 173-183, https://doi.org/10.1016/j.proeng.2014.11.026.   DOI
7 Y.Y. You, R.K. Shiue, R.H. Shiue, C. Chen, The study of carbon migration in dissimilar welding of the modified 9Cr-1Mo steel, J. Mater. Sci. Lett. 20 (15) (2001) 1429-1432, https://doi.org/10.1023/A:1011616232396.   DOI
8 Z.L. Zhang, M. Hauge, C. Thaulow, J. Odegard, A notched cross weld tensile testing method for determining true stress-strain curves for weldments, Eng. Fract. Mech. 69 (3) (2002) 353-366, https://doi.org/10.1016/S0013-7944(01) 00075-3.   DOI
9 J.W. Kim, K. Lee, J.S. Kim, T.S. Byun, Local mechanical properties of alloy 82/ 182 dissimilar weld joint between SA508 Gr.1a and F316 SS at RT and 320??C, J. Nucl. Mater. 384 (3) (2009) 212-221, https://doi.org/10.1016/j.jnucmat.2008.11.019.   DOI
10 H.T. Wang, G.Z. Wang, F.Z. Xuan, C.J. Liu, S.T. Tu, Local mechanical properties and microstructures of Alloy52M dissimilar metal welded joint between A508 ferritic steel and 316L stainless steel, Adv. Mater. Res. 509 (2012) 103-110, https://doi.org/10.4028/www.scientific.net/AMR.509.103.   DOI
11 K. Sharma, H.K. Khandelwal, V. Bhasin, R. Chhibber, Application of ball indentation technique for mechanical properties estimation of bi-metallic weld, Adv. Mater. Res. 585 (2012) 342-346, https://doi.org/10.4028/www.scientific.net/ AMR.585.342.   DOI
12 L. Falat, J. Kepic, L. Ciripova, P. Sevc, I. Dlouhy, The effects of postweld heat treatment and isothermal aging on T92 steel heat-affected zone mechanical properties of T92/TP316H dissimilar weldments, J. Mater. Res. 31 (10) (2016) 1532-1543, https://doi.org/10.1557/jmr.2016.134.   DOI
13 H. Ming, Z. Zhang, J. Wang, E.H. Han, W. Ke, Microstructural characterization of an SA508-309L/308L-316L domestic dissimilar metal welded safe-end joint, Mater. Char. 97 (2014) 101-115, https://doi.org/10.1016/j.matchar.2014.08.023.   DOI
14 D.W. Rathod, S. Pandey, P.K. Singh, R. Prasad, Mechanical properties variations and comparative analysis of dissimilar metal pipe welds in pressure vessel system of nuclear plants, J. Pressure Vessel Technol. 138 (1) (2015), https:// doi.org/10.1115/1.4031129, 11403.   DOI
15 H. Ming, R. Zhu, Z. Zhang, J. Wang, E.H. Han, W. Ke, M. Su, Microstructure, local mechanical properties and stress corrosion cracking susceptibility of an SA508-52M-316LN safe-end dissimilar metal weld joint by GTAW, Mater. Sci. Eng. A 669 (2016) 279-290, https://doi.org/10.1016/j.msea.2016.05.101.   DOI
16 S. Morito, J. Nishikawa, T. Maki, Dislocation density within lath martensite in Fe-C and Fe-Ni alloys, ISIJ Int. 43 (9) (2003) 1475-1477, https://doi.org/10.2355/isijinternational.43.1475.   DOI
17 M. Sireesha, V. Shankar, S.K. Albert, S. Sundaresan, Microstructural features of dissimilar welds between 316LN austenitic stainless steel and alloy 800, Mater. Sci. Eng. A 292 (1) (2000) 74-82, https://doi.org/10.1016/S0921-5093(00)00969-2.   DOI
18 H.T. Wang, G.Z. Wang, F.Z. Xuan, S.T. Tu, Fracture mechanism of a dissimilar metal welded joint in nuclear power plant, Eng. Fail. Anal. 28 (2013) 134-148, https://doi.org/10.1016/j.engfailanal.2012.10.005.   DOI
19 K. Laha, K.S. Chandravathi, P. Parameswaran, K.B.S. Rao, S.L. Mannan, Characterization of microstructures across the heat-affected zone of the modified 9Cr-1Mo weld joint to understand its role in promoting type IV cracking, Metall. Mater. Trans. A: Phys. Meta. Mater. Sci. 38 (1) (2007) 58-68, https://doi.org/10.1007/s11661-006-9050-0.   DOI
20 R. Viswanathan, J.F. Henry, J. Tanzosh, G. Stanko, J. Shingledecker, B. Vitalis, R. Purgert, U.S. Program on materials technology for ultra-supercritical coal power plants, J. Mater. Eng. Perform. 14 (3) (2005) 281-292, https://doi.org/ 10.1361/10599490524039.   DOI
21 H. Naffakh, M. Shamanian, F. Ashrafizadeh, Dissimilar welding of AISI 310 austenitic stainless steel to nickel-based alloy Inconel 657, J. Mater. Process. Technol. 209 (7) (2009) 3628-3639, https://doi.org/10.1016/j.jmatprotec. 2008.08.019.   DOI
22 IGCAR, "PFBR/32040/SP/1002/R-0dPrototype Fast Breeder Reactor Specification for the Qualification of the Welding Consumables," Indira Gandhi Centre for Atomic Research, Kalpakkam, India, Report No. PFBR/32040/SP/1002/R-0.
23 T.W. Nelson, J.C. Lippold, M.J. Mills, Investigation of boundaries and structures in dissimilar metal welds, Sci. Technol. Weld. Join. 3 (5) (1998) 249-255, https://doi.org/10.1179/136217198791137996.   DOI
24 M.G. Collins, A.J. Ramirez, J.C. Lippold, An investigation of ductility-dip cracking in nickel-based weld metals - Part III, Weld. J. 83 (2) (2004) 39S-49S.