Comparative Study on Hydrogen Embrittlement Susceptibility in Heat-Affected Zone of TP321 Stainless Steel

Abstract:

TP321 stainless steel is widely used in hydrogenation refining pipes owing to its excellent performance of creep stress resistance and high-temperature resistance. In this study, thermal simulation tests were carried out on the welding heat-affected zone (HAZ) of TP321 stainless steel at temperatures of 1300 °C, 1100 °C, and 850°C using a Gleeble 3800 testing machine. Slow strain tensile tests were conducted under the condition of electrolytic hydrogen charging (EHC) and the metallographic microstructure of cracks as well as the morphology of fractures were analyzed in detail. The result shows that hydrogen can change the fracture mode of tensile specimen and the cracks initiated from and near the specimen surface after EHC. Hydrogen significantly decreases the plastic deformation capability of HAZ in TP321 stainless steel. The reduction of area after the fracture decreases by 58%, 41%, and 45% for HAZ at 1300 °C, 1100 °C, and 850 °C, respectively. The existence of δ ferrite was considered to be the main reason for the aggravation of hydrogen-induced plasticity loss.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 568-574
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.568
• Online since: May 2020
• Authors: Xiu Qing Xu*, Jing Niu, Cheng Zheng Li, Hang Juan Huang, Cheng Xian Yin
• Keywords: Crack, Electrolytic Hydrogen Charging, Heat-Affected Zone, Plastic Deformation, Thermal Simulation Test, TP321 Stainless Steel

References

[1] X.G. Li, Review and prospect of hydrogen corrosion research at high temperature and high pressure, Petrochemical Corros. & Prot., 3 (2000)5-7. (in Chinese).

[2] J. Koukal, M. Sondel, D. Schwarz, Correlation of creep properties of simulated and real weld joints in modified 9%Cr steels, Welding in the World, 54 (2010) 27-34.

DOI: 10.1007/bf03263481

[3] R. G. Rizvanov, A. M. Fairushin, D. V. Karetnikov, Research of vibration treatment effect on the stress-strain properties and fracture strength of pipe welding joints of 15Cr5Mo creep-resisting steel, Oil & Gas Business, 1 (2013) 369.

DOI: 10.17122/ogbus-2015-5-398-410

[4] D. Hardie, J. Xu, E. A. Charles, et al, Hydrogen Embrittlement of stainless steel overlay materials for hydrogenators, Corros. Sci., 46 (2004) 3089-3100.

DOI: 10.1016/j.corsci.2004.03.017

[5] L. Zhang, M. Wen, M. Imade, et al, Hydrogen embrittlement of austenitic stainless steels at low temperatures, Environ. Assist. Fract.,(2006) 1003-1004.

DOI: 10.1007/1-4020-4972-2_497

[6] C. Pan, Y.J. Su, W.Y. Chu, et al. Hydrogen embrittlement of weld metal of austenitic stainless steels, Corros. Sci., 9(2002)1983-1993.

DOI: 10.1016/s0010-938x(02)00011-2

[7] C. L. Briant, Hydrogen assisted cracking of sensitized 304 stainless steel, Metallurgical Transactions A, 5 (1978) 731-733.

DOI: 10.1007/bf02659931

[8] J. Michalska, B. Chmiela, J. Łabanowski, et al, Hydrogen damage in super austenitic 904L stainless steels, J. Mater. Eng. Perform., 8 (2014) 2760-2765.

DOI: 10.1007/s11665-014-1044-2

[9] Y. Murakami, T. Kanezaki, Y. Mine, et al, Hydrogen embrittlement mechanism in fatigue of austenitic stainless steels,Metall. Mater. Trans., 6 (2008) 1327.

DOI: 10.1007/s11661-008-9506-5

[10] X.G. Li, H. Chen, Z.M. Yao, et al. Hydrogen attack on austenitic steel 304 under high temperature and high pressure, Acta. Metall. Sin., 6 (1993) 374-378. (in Chinese).