Effect of cold work on the stress corrosion cracking behavior of Alloy 690 in supercritical water environment

2018 ◽  
Vol 498 ◽  
pp. 117-128 ◽  
Author(s):  
Kai Chen ◽  
Donghai Du ◽  
Wenhua Gao ◽  
Xianglong Guo ◽  
Lefu Zhang ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Supercritical Water ◽  
Stress Corrosion Cracking ◽  
Cold Work ◽  
Water Environment ◽  
Corrosion Cracking ◽  
Cracking Behavior ◽  
Alloy 690

The Stress Corrosion Cracking Behavior of Alloys 690 and 152 Weld in a PWR Environment

2008 ◽  
Author(s):  
B. Alexandreanu ◽  
O. K. Chopra ◽  
W. J. Shack
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Water Environment ◽  
Corrosion Cracking ◽  
Pressurized Water ◽  
Cracking Behavior ◽  
Alloy 690 ◽  
Primary Water ◽  
Cold Rolled ◽  
Water Reactors

Alloys 690 and 152 are the replacement materials of choice for Alloys 600 and 182, respectively. The latter two alloys are used as structural materials in pressurized water reactors (PWRs) and have been found to undergo stress corrosion cracking (SCC). The objective of this work is to determine the crack growth rates (CGRs) in a simulated PWR water environment for the replacement alloys. The study involved Alloy 690 cold-rolled by 26% and a laboratory-prepared Alloy 152 double-J weld in the as-welded condition. The experimental approach involved pre-cracking in a primary water environment and monitoring the cyclic CGRs to determine the optimum conditions for transitioning from the fatigue transgranular to intergranular SCC fracture mode. The cyclic CGRs of cold-rolled Alloy 690 showed significant environmental enhancement, while those for Alloy 152 were minimal. Both materials exhibited SCC of 10−11 m/s under constant loading at moderate stress intensity factors. The paper also presents tensile property data for Alloy 690TT and Alloy 152 weld in the temperature range 25–870°C.

Effect of cold work on stress corrosion cracking behavior of types 304 and 316 stainless steels

1985 ◽  
Vol 16 (2) ◽  
pp. 285-289 ◽  
Author(s):  
P. Muraleedharan ◽  
H. S. Khatak ◽  
J. B. Gnanamoorthy ◽  
P. Rodriguez
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Cold Work ◽  
Corrosion Cracking ◽  
Cracking Behavior

Effect of pH on Sea Water Stress Corrosion Cracking Behavior of the Ti-7Al-2Cb-1Ta Alloy

CORROSION ◽  
1970 ◽  
Vol 26 (3) ◽  
pp. 89-94 ◽  
Author(s):  
D. A. LITVIN ◽  
B. HILL
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Sea Water ◽  
Water Environment ◽  
Corrosion Cracking ◽  
Cracking Behavior ◽  
Water Ph ◽  
Weight Test ◽  
Corrosion Susceptibility ◽  
Ph Level

Abstract The purpose of this investigation was to determine the effect of varying the pH of a sea water environment on the stress corrosion cracking behavior of the Ti-7Al-2Cb-1Ta alloy. Various pH levels of 1.0, 3.0, 5.0, 7.4, 9.0, 11.0, and 11.6 were studied by additions of HCl and NaOH to the as-received sea water (pH = 7.4). The titanium specimens were beta-fabricated (rolled 1900 F, 1038 C), and tested using a cantilever weight test. It was found that an increase in the pH level of the sea water from 1.0 to 7.4 decreased the stress corrosion susceptibility of the Ti-7Al-2Cb-1Ta alloy. In all cases, the mode of cracking was transgranular; yet, differences in the angle of cracking through the titanium platelet structure were observed. A distinct low ductility zone on the fracture surface of the sea water samples was noted, but no correlation could be made between the size of this zone and the pH of the solution. Photomicrographs of the specimens are included, along with macrographs of the fractured surfaces.

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