Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-23T06:35:06.942Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructure and electrochemical behavior of stainless steel weld overlay cladding exposed to post weld heat treatment

Published online by Cambridge University Press:  30 January 2017

X.Y. Cao ,
P. Zhu ,
T.G. Liu ,
Y.H. Lu  and
T. Shoji
X.Y. Cao
Affiliation:
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China
P. Zhu
Affiliation:
Remanufacturing and Electric Power Safety Center, Suzhou Nuclear Power Research Institute Co. Ltd., Suzhou 215004, China
T.G. Liu
Affiliation:
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China
Y.H. Lu*
Affiliation:
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China
T. Shoji
Affiliation:
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China; and Fracture and Reliability Research Institute, Tohoku University, Sendai 980-8579, Japan
*
a) Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Microstructure and electrochemical behavior of stainless steel weld overlay cladding exposed to post weld heat treatment (PWHT) were investigated, wherein pitting and intergranular corrosion behaviors of the cladding material were evaluated by potentiodynamic polarization and double loop electrochemical potentiokinetic reactivation methods. The results indicated that inclusions, multiple element (Mn, Si, and Al) oxides distributed randomly in the cladding material with a size less than 1 μm. PWHT contributed to carbides precipitation along the δ/γ phase interface and the formation of Cr-depleted zone in the austenite phase. Inclusions acted as the pitting sites in the sample as welded. PWHT reduced the pitting potential and contributed to the formation of larger and deeper pits, which nucleated around the δ/γ phase interface primarily. Existence of carbides and Cr-depleted zone dominated the loss of intergranular corrosion resistance after PWHT.

Keywords

weldingmicrostructurecorrosion
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 4 , 28 February 2017 , pp. 852 - 862
Check for updates
Copyright
Copyright © Materials Research Society 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

Contributing Editor: Jürgen Eckert

References

REFERENCES

Li, S.L., Wang, Y.L., Zhang, H.L., Li, S.X., Zhang, K., Xue, F., and Wang, X.T.: Microstructure evolution and impact fracture behaviors of Z3CN20-09M stainless steels after long-term thermal aging. J. Nucl. Mater. 433(1–3), 41 (2013).CrossRefGoogle Scholar
Unnikrishnan, R., Idury, K.S.N.S., Ismail, T.P., Bhadauria, A., Shekhawat, S.K., Khatirkar, R.K., and Sapate, S.G.: Effect of heat input on the microstructure, residual stresses and corrosion resistance of 304L austenitic stainless steel weldments. Mater. Charact. 93(7), 10 (2014).CrossRefGoogle Scholar
Cui, Y. and Lundin, C.D.: Austenite-preferential corrosion attack in 316 austenitic stainless steel weld metals. Mater. Des. 28(1), 324 (2007).CrossRefGoogle Scholar
Badji, R., Bacroix, B., and Bouabdallah, M.: Texture, microstructure and anisotropic properties in annealed 2205 duplex stainless steel welds. Mater. Charact. 62(9), 833 (2011).CrossRefGoogle Scholar
Li, G.F., Charles, E.A., and Congleton, J.: Effect of post weld heat treatment on stress corrosion cracking of a low alloy steel to stainless steel transition weld. Corros. Sci. 43(10), 1963 (2001).CrossRefGoogle Scholar
Li, G.F. and Congleton, J.: Stress corrosion cracking of a low alloy steel to stainless steel transition weld in PWR primary waters at 292 °C. Corros. Sci. 42(6), 1005 (2000).CrossRefGoogle Scholar
Takeuchi, T., Takuyo, Y., Tomoki, M., Koji, A., and Koji, F.: Corrosion behavior of stainless steels in simulated PWR primary water-effect of chromium content in alloys and dissolved hydrogen. J. Nucl. Sci. Technol. 45(10), 975 (2008).Google Scholar
Abbasi Aghuy, A., Zakeri, M., Moayed, M.H., and Mazinani, M.: Effect of grain size on pitting corrosion of 304L austenite stainless steel. Corros. Sci. 94, 368 (2015).CrossRefGoogle Scholar
Ha, H-Y., Jang, M-H., and Lee, T-H.: Influence of Mn in solid solution on pitting corrosion behavior of Fe–23 wt% Cr-based alloys. Corros. Sci. 191(10), 864 (2016).Google Scholar
Yang, Y.H., Yan, B., Wang, J., and Li, J.L.: The influence of solution treatment temperature on microstructure and corrosion behavior of high temperature ageing in 25% Cr duplex stainless steel. J. Alloys Compd. 509(36), 8870 (2011).CrossRefGoogle Scholar
Cardoso, J.L. and Vieira, R.C.A.: Pitting corrosion resistance of austenitic and superaustenitic stainless steels in aqueous medium of NaCl and H2SO4 . J. Mater. Res. 31(12), 1755 (2016).CrossRefGoogle Scholar
Pardo, A., Merino, M.C., Coy, A.E., Viejo, F., Arrabal, R., and Matykina, E.: Pitting corrosion behaviour of austenitic stainless steels-combining effects of Mn and Mo additions. Corros. Sci. 50(6), 1796 (2008).CrossRefGoogle Scholar
Ke, R. and Alkire, R.: Initiation of corrosion pits at inclusions on 304 stainless steel. J. Electrochem. Soc. 139(6), 1573 (1992).CrossRefGoogle Scholar
Otake, A., Muto, I., Chiba, A., Sugawara, Y., and Hara, N.: Microelectrochemical investigation of pit initiation site on austenitic cast stainless steel. ECS Trans. 69(28), 1 (2015).CrossRefGoogle Scholar
Lo, I. and Tsai, W.T.: Effect of heat treatment on the precipitation and pitting corrosion behavior of 347 SS weld overlay. Mater. Sci. Eng., A 355(1), 137 (2003).CrossRefGoogle Scholar
Zhu, Z.Y., Deng, C.Y., Wang, Y., Yang, Z.W., Ding, J.K., and Wang, D.P.: Effect of post weld heat treatment on the microstructure and corrosion behavior of AA2219 aluminum alloy joints welded by variable polarity tungsten inert gas welding. Mater. Des. 65, 1075 (2015).CrossRefGoogle Scholar
Yang, Y., Wang, Z., Tan, H., Hong, J.F., Jiang, Y.M., Jiang, L.Z., and Lin, J.: Effect of a brief post-weld heat treatment on the microstructure evolution and pitting corrosion of laser beam welded UNS S31803 duplex stainless steel. Corros. Sci. 65(9), 472 (2012).CrossRefGoogle Scholar
Guan, K., Xu, X., Xu, H., and Wang, Z.: Effect of aging at 700 °C on precipitation and toughness of AISI 321 and AISI 347 austenitic stainless steel welds. Nucl. Eng. Des. 235(23), 2485 (2005).CrossRefGoogle Scholar
Bai, G., Lu, S., Li, D., and Li, Y.: Intergranular corrosion behavior associated with delta-ferrite transformation of Ti-modified Super 304H austenitic stainless steel. Corros. Sci. 90, 347 (2015).CrossRefGoogle Scholar
Moura, V.S., Lima, L.D., Pardal, J.M., and Tavares, S.S.M.: Influence of microstructure on the corrosion resistance of the duplex stainless steel UNS S31803. Mater. Charact. 59(8), 1127 (2008).CrossRefGoogle Scholar
Liu, J.H., Wen, Y., Zhang, X.M., Huo, S.M., and Gong, B.: Corrosion properties of sealing surface material for RPV under abnormal working conditions. Nucl. Power Eng. 33(1), 83 (2012).Google Scholar
Fang, Z., Zhang, Y.L., Wu, Y.S., Sun, D.B., and Li, J.Q.: Detecting susceptible to intergranular corrosion of 308L stainless steel by EPR method. Corros. Sci. Prot. Technol. 8, 87 (1996).Google Scholar
Tang, Y.M., Zuo, Y., Wang, J.N., Zhao, X.H., Niu, B., and Lin, B.: The metastable pitting potential and its relation to the pitting potential for four materials in chloride solutions. Corros. Sci. 80(3), 111 (2014).CrossRefGoogle Scholar
Di, X., Ji, S., Cheng, F., and Cao, J.: Effect of cooling rate on microstructure, inclusions and mechanical properties of weld metal in simulated local dry underwater welding. Mater. Des. 88, 505 (2015).CrossRefGoogle Scholar
Ha, H.Y., Jang, M.H., and Lee, T.H.: Influences of Mn in solid solution on the pitting corrosion behaviour of Fe-23 wt% Cr-based alloys. Electrochim. Acta 191, 864 (2016).CrossRefGoogle Scholar
Sheng, Z.Q.: The intercrystalline corrosion in the stainless bead welding layer. Nucl. Power Eng. 11, 48 (1990).Google Scholar
Nakhaie, D. and Moayed, M.H.: Pitting corrosion of cold rolled solution treated 17-4 PH stainless steel. Corros. Sci. 80(3), 290 (2014).CrossRefGoogle Scholar