scholarly journals Effects of Microstructure on the Mechanical Properties and Stress Corrosion Cracking of an Al-Zn-Mg-Sc-Zr Alloy by Various Temper Treatments

2007 ◽  
Vol 48 (3) ◽  
pp. 600-609 ◽  
Author(s):  
Ling-Mei Wu ◽  
Wen-Hsiung Wang ◽  
Yung-Fu Hsu ◽  
Shan Trong
Keyword(s):  
Mechanical Properties ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Zr Alloy

Inhibiting stress corrosion cracking by removing corrosion products from the Mg-Zn-Zr alloy pre-exposed to corrosion solutions

2021 ◽  
Vol 205 ◽  
pp. 116570
Author(s):  
Evgeniy Merson ◽  
Vitaliy Poluyanov ◽  
Pavel Myagkikh ◽  
Dmitri Merson ◽  
Alexei Vinogradov
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Corrosion Products ◽  
Zr Alloy

scholarly journals Effect of solution treatment on stress corrosion cracking behavior of an as-forged Mg-Zn-Y-Zr alloy

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
S. D. Wang ◽  
D. K. Xu ◽  
B. J. Wang ◽  
L. Y. Sheng ◽  
E. H. Han ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Solution Treatment ◽  
Corrosion Cracking ◽  
Cracking Behavior ◽  
Zr Alloy

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.

About the Role of Hydrogen in Stress Corrosion Cracking of a 7xxx Aluminium Alloy (Al-Zn-Mg)

2016 ◽  
Vol 877 ◽  
pp. 522-529 ◽  
Author(s):  
Loïc Oger ◽  
Eric Andrieu ◽  
Grégory Odemer ◽  
Lionel Peguet ◽  
Christine Blanc
Keyword(s):  
Mechanical Properties ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Local Stress ◽  
Corrosion Cracking ◽  
Hydrogen Trapping ◽  
Stress Tests ◽  
Fracture Modes ◽  
Cracking Mechanisms ◽  
Local Stress State

The effects of hydrogen during stress corrosion cracking mechanisms (SCC) have been highlighted for many years but hydrogen trapping mechanisms are not yet well understood for 7xxx aluminium alloys. The 7046-T4 Al-Zn-Mg alloy has been chosen for this study because its low corrosion susceptibility allows hydrogen embrittlement (HE) to be more easily distinguished during SCC tests. Tensile stress tests have been carried out at a strain rate of 10-3 s-1 on tensile samples after an exposure at their corrosion potential in a 0.6M chloride solution for 165 hours under an imposed loading of 80%Rp0.2. The results were compared to those obtained for samples pre-corroded without mechanical loading applied and healthy specimens. A loss of mechanical properties was observed for the pre-corroded samples and presumably attributed to the absorption, the diffusion and the trapping of hydrogen which affects a volume under the surface of the alloy and modifies its mechanical properties. Scanning electron microscope (SEM) observations highlighted a strong effect of hydrogen on fracture modes. The ductile-intergranular initial fracture mode observed on the healthy samples was partially replaced for the pre-corroded samples by a combination of two main fracture modes, i.e. brittle intergranular and cleavage, in relation with the nature of the hydrogen trapping sites and local stress state.

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