Sage Journals: Discover world-class research

Abstract

The sour gas susceptibility of X-80 steel was investigated after quenching and tempering. Self-loaded modified wedge opening loading (M-WOL) specimens were exposed to an NACE sour gas solution under an applied opening mode stress intensity factor K_I of 40 MPa m^1/2 In this microstructural condition, crack arrest was exhibited at a threshold stress intensity value (K_ISSC) of 32 MPa m^1/2. The relatively good performance of the steel after quenching and tempering was closely related to the development of a fine distribution of (Nb, Ti) containing carbides along ferrite lath boundaries. Apparently, the main crack path exhibited a significant number of bifurcations as it shifted continuously to follow the ferrite interlath boundaries as well as the prior austenitic grain boundaries.

Get full access to this article

View all access options for this article.

References

Kobavashi

: Proc. 8th Mexico-Japan Seminar, JICA ‘94, Mexico City, Mexico, July 1994, IPN-JICA, (ed. Kawakami

), 9.

Craig

: Proc. Conf. ‘Hydrogen effects on material behaviour’, (ed. Moody

N. R.

and Thompson

A. W.

), 955; 1990, Moran, WY, TMS-AIME.

Ashai

, Sogo

, and HIGASHIYAMA

: Proc. Conf. Corrosion 87, San Francisco, CA, USA, March 1987, NACE, Paper 290.

‘Guidelines on materials requirements for carbon and low alloy steels for H2S-containing environments in oil and gas production’, EFC PublicationNo. 16, 1995, London, The Institute of Materials.

Lopez

H. F.

, Bharadwaj

, ALBARRAN

J. L.

, and MARTINEZ

: Metall. Mater. Trans. A, to be published.

‘Sulphide stress cracking resistant metallic materials for oil field equipment’, NACE Standard Materials Recommendation MR- 01–75, NACE, Houston, TX, 1996.

Novak

S. R.

and Rolfe

S. T.

: Corrosion, 1969, 4, 701.

Deans

W. F.

and Richards

C. E.

: J. Test. Eval., 1979, 7, 147.

‘Laboratory testing of metals for resistance to environmental cracking in H2S environments’, NACE Standard TM-0177-90, NACE, Houston, TX, 1990.

10.

Lisagor

W. B.

: in ‘Environmental-sensitive fracture: evaluation and comparison of test methods’, STP 821, 80; 1984, Philadelphia, PA, ASTM.

11.

Albarran

J. L.

, Martinez

, and it. F. LOPEZ: COrrOS. SCi., to be published.

12.

LÓPEZ

H. F.

, Ragiiunatii

, Albarran

J. L.

, and MARTINEZ

: Metall. Mater. Trans. A, 1996, 27A, 3601.

13.

Honeycombe

R. W. K.

and Hancock

(ed.): ‘Steels, micro-structure and properties’; 1981, London, Edward Arnold.

14.

Charbonnier

J. C.

, Margot-Marette

, BRASS

A. M.

, and AUCOUTURIER

: Metall. Trans. A, 1985, 16A, 935.

Improved sour gas resistance of X-80 steel after quenching and tempering

Abstract

Get full access to this article

References