Effects of Hydrogen on Tensile Properties of SA508 Cl.3 Reactor Pressure Vessel Steel at High Temperature


Article Preview

Tensile properties of SA508 Cl.3 reactor pressure vessel (RPV) steel were investigated at room temperature and at 288 °C before and after hydrogen charging by electrolysis. At room temperature, the charged hydrogen induced distinct hardening and ductility loss, where quasi-cleavage features were observed around inclusions. These results may be due to interactions between the dissolved hydrogen and dislocations and an increase of hydrogen concentration near the inclusions. On the other hand, at 288 °C, the charged hydrogen induced some softening, which was explained in terms of the hydrogen shielding effect, and of strain localization by dynamic strain aging (DSA). Further, at 288 °C, the fracture surfaces of the hydrogen-charged specimens showed brittle regions, where the hydrogen might have been trapped in microvoids, leading to internal pressurization.



Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie




H. C. Cho and I. S. Kim, "Effects of Hydrogen on Tensile Properties of SA508 Cl.3 Reactor Pressure Vessel Steel at High Temperature", Materials Science Forum, Vols. 475-479, pp. 4121-4124, 2005

Online since:

January 2005




[1] S.G. Lee and I.S. Kim: Journal of Pressure Vessel Technology Vol. 123(2) (2001), p.173.

[2] H.K. Birnbaum and P. Sofronis: Materials Science and Engineering Vol. 176(A) (1994) p.191.

[3] Seong-Jong Kim and Kyung-Man Moon: Met. Mater. -Int. Vol. 8(5) (2002), p.395.

[4] W.Y. Chu, Y.B. Wang and L.J. Qiao: Journal of Nuclear Materials Vol. 280 (2000) p.250.

[5] S.G. Lee and I.S. Kim: Journal of Nuclear Science and Technology Vol. 28 (2001) p.120.

[6] G.R. Casky, Jr. A.H. Dexter, M.L. Holzworth, M.R. Louthan and Jr. R.G. Derrick: Corrosion Vol. 32(9) (1976) p.370.

[7] G.F. Vander Voort: Metallography - principles and practice (McGraw-Hill Book Company 1984).

[8] Tuyen D. Le and B.E. Wilde: Corrosion Vol. 32(7) (1983) p.258.

[9] P.J. Ferreira, I.M. Robertson and H.K. Birnbaum: Acta Metallurgica Vol. 47(100) (1999) p.2991.

[10] Byung Ho Lee and In Sup Kim: Journal of Nuclear Materials Vol. 226 (1995) p.123.

[11] H.J. Maier, W. Popp and H. Kaesche: Materials Science and Engineering Vol. 191(A) (1995) p.17.

[12] T.D. Lee and I.M. Bernstein: Acta Metallurgica & Materials Vol. 39 (1991) p.363.

[13] R.A. Oriani and P.H. Josephic: Acta Metallurgica Vol. 27 (1979) p.997.

[14] W.Y. Choo and J.Y. Lee: Metallurgical Transactions Vol. 13(A) (1982) p.135.

[15] S. Asano and R. Otsuk: Scripta Metallurgica Vol. 10 (1976) p.1015.

Fetching data from Crossref.
This may take some time to load.