Characterization of Intergranular Corrosion in Heat-Affected Zone of Low Carbon 12Cr-Ni Ferritic Stainless Steel

Abstract:

Intergranular corrosion in heat-affected zone of low carbon 12Cr-Ni ferritic stainless steel was investigated by the method of practice Z in ASTM A 763-93. The microstructure of welded joint was characterized using an optical microscope and a scanning electronic microscope. Severe intergranular corrosion (IGC) was only observed in low temperature heat-affected zone (LTHAZ) adjacent to base metals at the back of the welded joints in unstabilized steel. On the other hand, IGC was not observed in the welded joints of stabilized steels. According to the analysis of microstructure, the severe IGC is attributed to both the precipitated phase along the grain boundaries inducing the presence of chromium-depleted zone and the welding residual tensile stress promoting the corrosion. Therefore, stabilized elements addition such as Ti and Nb is required in order to avoid the IGC in welded joint of these steels. Relief residual tensile stress by post weld heat treatment would also be an effective method to avoid the IGC in the welded joints of these steels.

• Periodical: Materials Science Forum (Volume 689)
• Pages: 260-268
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.689.260
• Online since: June 2011
• Authors: Huai Bei Zheng, Xiao Ning Ye, Zheng Cai, Lai Zhu Jiang, Zhen Yu Liu, Guo Dong Wang, Bao Sen Wang
• Keywords: Ferritic Stainless Steel (FSS), Heat Affected Zone (HAZ), Intergranular Corrosion (IGC)

References

[1] A. Ball, Y. Chauhan, G. B. Schaffer. Microstructure, phase equilibria, and transformations in corrosion resistant dual phase steel designated 3CR12. Mater. Sci. Tech. 3 (1987), pp.189-196.

DOI: 10.1179/mst.1987.3.3.189

[2] M. Topic, C. Allen, R. Tait. The effect of cold work and heat treatment on the fatigue behaviour of 3CR12 corrosion resistant steel wire. Int. J. Fatigue 29 (2007), pp.49-56.

DOI: 10.1016/j.ijfatigue.2006.02.050

[3] Columbus Stainless. 3CR12 Technical data, South Africa: Columbus Stainless (Pty) Ltd; June (2007).

[4] P.H. Chong, Z. Liu, P. Skeldon et al. Characterisation and corriosn performance of laser-melted 3CR12 steel. Appl. Surf Sci. 247 (2005), pp.362-268.

DOI: 10.1016/j.apsusc.2005.01.136

[5] Emel Taban, Eddy Deleu, Alfred Dhooge, Erdinc Kaluc. Laser welding of modified 12%Cr stainless steel: strength, fatigue, toughness, microstructure, and corrosion properties. Mater. Design 30(4) (2009), pp.1193-200.

DOI: 10.1016/j.matdes.2008.06.030

[6] Emel Taban, Erdinc Kaluc, Alfred Dhooge. Hybrid (plasma+gas tungsten arc) weldability of modified 12%Cr ferritic stainless steel. Mater. Design 30 (2009), pp.4236-42.

DOI: 10.1016/j.matdes.2009.04.031

[7] Emel Taban, Alfred Dhooge, Erdinc Kaluc. Plasma arc welding of modified 12% Cr stainless steel [J]. Mater. Manuf. Process 24(6) (2009), pp.649-59.

DOI: 10.1080/10426910902769152

[8] ThyssenKrupp Nirosta. NIROSTA 4003-The winning formula for modern steel application. Product catalogue. Germany: ThyssenKrupp Nirosta; October (2004).

DOI: 10.1007/978-3-8349-8910-9_9

[9] AK Steel. Product data sheet-41003 stainless steel data. Product catalogue. America: AK Steel Corporation; (2007).

[10] AK Steel. Product data bulletin-409Ni stainless steel data. Product catalogue. America: AK Steel Corporation; (2007).

[11] Sandvik. Plate sheet and coil: Sandvik 5CR12Ti. Product catalogue. Sweden: Sandvik; November (2004).

[12] Li-xin Wang, Chang-jiang Song, Feng-mei Sun, Li-juan Li, Qi-jie Zhai. Microstructure and mechanical properties of 12 wt% ferritic stainless steel with Ti and Nb dual stabilization. Mater. Design 30 (2009), pp.49-56.

DOI: 10.1016/j.matdes.2008.04.040

[13] Fujita Kenichi, Yaginuma Hiroshi, Kakihara Setsuo. A structural stainless steel with excellent corrosion resistance in welding: JFE410RW. JFE Technical Report 12 (2008), pp.65-70.

[14] A M Meyer, M du TOIT. Interstitial diffusion of carbon and nitrogen into heat-affected zones of 11-12% Chromium steel welds [J]. Weld. J. 80(12) (2001), pp.275-80.

[15] L.M. Matthews, B. Griesel, P.T. Longman, G.T. van Rooyen, J.M. Prozzi. Sensitization in low carbon 12% Chromium-containing stainless steel. Proceedings of the 14th International Corrosion Congress. South Africa (1999), p.332.

[16] A Tuling. EELS study of sensitization in 12% chromium steel. Proceedings of the microscopy society of Southern Africa 31 (2001), p.26.

[17] H. Tomari, K. Fujiwara, K. Shimogori, T. Fukuzuka, and M. Kanda. Intergranular stress corrosion cracking of 13%Cr and 18%Cr ferritc steels in high temperature high purity water. Corrosion 38(5) (1982), pp.283-294.

DOI: 10.5006/1.3577351

[18] P.C. Pistorius and A. Mignone. Modified electrochemical potentiokinetic reactivation method for detecting sensitization in 12wt-% chromium ferritic stainless steels. Corrosion 48(9) (1992), pp.715-726.

DOI: 10.5006/1.3315992

[19] M. D. Roit, G. T. Van Rooyen, D. Smith. Heat-affected zone sensitization and stress corrosion cracking in 12% Chromium Type 1. 4003 ferritic stainless steel. Corrosion 63(5) (2007), pp.395-404.

DOI: 10.5006/1.3278392

[20] Martin van Warmelo, David Nolan, John Norrish. Mitigation of sensitation effects in unstabilised 12%Cr ferritic stainless steel welds. Mater. Sci. Eng. A 464 (2007), pp.157-169.

DOI: 10.1016/j.msea.2007.02.113

[21] M. L. Greeff, M. du Toit. Looking at the sensitization of 11-12%Chromium EN 1. 4003 stainless steels during welding. Weld. J. 85(11) (2006), pp.243-251.

[22] Huaibei Zheng, Xiaoning Ye, Laizhu Jiang et al. Study on microstructure of low carbon 12% chromium stainless steel in high temperature heat-affected zone. Mater. design 31 (2010), pp.4836-4841.

DOI: 10.1016/j.matdes.2010.05.054

[23] ASTM A763-93. Standard practices for detecting susceptibility to intergranular attack in ferritic stainless steels. ASTM International (2004).

DOI: 10.1520/a0763

[24] Xiaodong Liu, G.S. Frankel, B. Zoofan, S.I. Rokhlin. Effect of applied tensile stress on intergranular corrosion of AA2024-T3. Corrosion Sci. 46 (2006), pp.405-425.

DOI: 10.1016/s0010-938x(03)00149-5