Relationships Between Electrochemical Measurements and Stress Corrosion Cracking of Maraging Steel

CORROSION ◽  
1967 ◽  
Vol 23 (1) ◽  
pp. 5-10 ◽  
Author(s):  
J. A. S. GREEN ◽  
E. G. HANEY
Keyword(s):  
Yield Strength ◽  
Stress Corrosion ◽  
Maraging Steel ◽  
Stress Corrosion Cracking ◽  
Electrode Potential ◽  
Full Range ◽  
Corrosion Cracking ◽  
Deionized Water ◽  
Failure Times ◽  
Ph Values

Abstract Stress corrosion cracking of 18Ni maraging steel foil has been studied in deionized water solutions with the pH adjusted by NaOH additions over a range from 8 to 13. The full range of NaCl contents from saturated solutions to no addition was tested with specimens stressed to 75 percent of yield strength. For each variation in NaCl content, the specimen failure times go through a minimum with respect to pH. With increasing NaCl content, the minimum becomes more pronounced and its position shifts towards higher pH values. The position of each minimum is indicated by electrode potential measurements. Potentiostatic measurements as a function of pH confirm that maximum susceptibility to stress corrosion cracking occurs just prior to the onset of passivation.

A critical review on susceptibility of stress corrosion cracking in maraging steel weldments

2020 ◽  
Vol 27 ◽  
pp. 2303-2307 ◽  
Author(s):  
Arghya Bagchi ◽  
Deepak Kumar Gope ◽  
S. Chattopadhyaya ◽  
Gowrishankar Wuriti
Keyword(s):  
Stress Corrosion ◽  
Maraging Steel ◽  
Stress Corrosion Cracking ◽  
Critical Review ◽  
Corrosion Cracking

X-Ray Fractography of Stress Corrosion Cracking in Aisi 4340 Steel Under Controlled Electrode potential

1987 ◽  
Vol 31 ◽  
pp. 269-276 ◽  
Author(s):  
Masaaki Tsuda ◽  
Yukio Hirose ◽  
Zenjiro Yajima ◽  
Keisuke Tanaka
Keyword(s):  
Residual Stress ◽  
Fracture Surface ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Electrode Potential ◽  
Diffraction Method ◽  
Corrosion Cracking ◽  
Fracture Mechanisms ◽  
X Ray ◽  
Electrode Potentials

The residual stress left on the fracture surface is one of the important parameters in X-ray fractography and has been used to analyze fracture mechanisms in fracture toughness and fatigue tests especially of high strength steels.In the present paper, the distribution of residual stress beneath the fracture surface made by stress corrosion cracking was measured by the X-ray diffraction method. Stress corrosion cracking tests were conducted by using compact tension specimens of 200°C tempered AISI steel in 3.5% NaCl solution environment under various electrode potentials. The effect of electrode potential on the growth kinetics of stress corrosion cracking is discussed on the basis of residual stress distribution.

Materials for Generator Retaining Rings

1981 ◽  
Vol 103 (4) ◽  
pp. 267-275 ◽  
Author(s):  
R. Viswanathan
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
State Of The Art ◽  
Corrosion Cracking ◽  
Safe Operation

Retaining rings are among the highest stressed components of electricial generators, whose integrity is critical to the reliable and safe operation of the generators. The steel currently used for this application is susceptible to stress corrosion cracking and is also limited by yield strength to about 1200 MPa. The use of alternate materials with improved mechanical properties can enhance the reliability, efficiency, size capability and availability of generators. This paper is a state-of-the-art review of the materials technology pertaining to retaining rings.

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