Crack growth rates of Alloy 182 in high-temperature water
- Toshiba Corp., Yokohama (Japan)
The crack growth tests on Alloy 182 under constant load conditions were carried out in 288 C pure water in order to evaluate the effects of stress intensity factor (K) and dissolved oxygen (DO) concentration on crack growth rate. 1T-CT specimens were machined from 70mm heavy thickness weld joint made of wrought Alloy 600 and Alloy 182 weld metal. A fatigue pre-crack was introduced into each specimen, so that environmentally assisted cracks would propagate parallel to the weld dendrite direction. The weld metal chemistries had a sulfur content of 0.006% and a phosphorus content of 0.012%. During their crack growth testing with an applied constant load, the reversing d.c. potential drop technique was conducted to monitor crack length. The crack growth rate was increased with increasing K from 25 to 41 MPa{radical}m under 250 ppb DO water. The threshold of K for crack growth was considered to be within 15--20 MPa{radical}m. The crack growth rates at 35 MPa{radical}m were retarded by changing the DO concentration from 250 ppb to 20 ppb.
- OSTI ID:
- 203832
- Report Number(s):
- CONF-950816-; ISBN 1-877914-95-9; TRN: 96:009798
- Resource Relation:
- Conference: 7. international symposium on environmental degradation of materials in nuclear power plants: water reactors, Breckenridge, CO (United States), 6-10 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of Seventh international symposium on environmental degradation of materials in nuclear power systems -- Water reactors: Proceedings and symposium discussions. Volume 1; Airey, G.; Andresen, P.; Brown, J. [eds.] [and others]; PB: 664 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of dissolved oxygen, solution conductivity and stress intensity on the interdendritic stress corrosion cracking of Inconel 182 weld metal
Crack propagation in stainless steels and nickel base alloys in a commercial operating BWR