Environmentally assisted crack growth in one-dimensionally cold worked Alloy 690TT in primary water

• DOI: 10.1016/j.corsci.2011.12.031
• Publication Date: 2012-01-04T09:42:34Z
• Authors: Q.J. Peng; J. Hou; T. Yonezawa; T. Shoji; Z.M. Zhang; F. Huang; E.-H. Han; W. Ke
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

Abstract Environmentally assisted crack growth in thermally treated Alloy 690 cold worked one-dimensionally to the thickness reduction of 25% in primary water was investigated. In the water at 50 °C and dissolved hydrogen (DH) of 2.7–2.9 ppm, the alloy showed a crack growth rate of −9 mm/s at a stress intensity factor of 35 MPa√m. In the water at 340 °C, stress corrosion crack growth rate of −8 mm/s was observed in the alloy over a DH range of 0.37–2.6 ppm. Further, it was found that hydrogen could promote SCC growth when increasing DH from a very low level.