scholarly journals Corrosion Fatigue of Aluminum-Copper-Lithium Alloy 2050-T84 Submitted at Salt Spray and Aqueous Saline Solution

2020 ◽  
Author(s):  
Maciel Carla Isabel dos Santos ◽  
Bose Filho Waldek Wladimir ◽  
Ruchert Cassius Olívio Figueiredo Terra
Keyword(s):  
Corrosion Fatigue ◽  
Saline Solution ◽  
Salt Spray ◽  
Lithium Alloy

Corrosion and Fatigue of AL-Alloys AA359.0 and AA6060 in Different Surface Treatment States

2013 ◽  
Vol 768-769 ◽  
pp. 572-579 ◽  
Author(s):  
Klaus Timmermann ◽  
Wolfgang Zinn ◽  
Berthold Scholtes
Keyword(s):  
Residual Stress ◽  
Corrosion Fatigue ◽  
Fatigue Behavior ◽  
Salt Spray ◽  
Fatigue Tests ◽  
Surface Treatments ◽  
Near Surface ◽  
Materials Properties ◽  
Surface Materials ◽  
Mechanical Surface

The consequences of near surface materials properties and residual stress states produced by specific manufacturing operations on damage evolution during corrosion fatigue of the Al-base alloys AA359.0 (German grade G-AlSi9Cu3) and AA6060 (German grade AlMgSi0.5) were systematically investigated. Specimens were processed applying mechanical surface treatments like shot peening or deep rolling and investigated in comparison with turned states. Surface topographies as well as near surface work hardening states and residual stress depth distributions were analyzed. Tension-compression fatigue tests were carried out under laboratory air as well as under salt spray test conditions or in salt solution. Crack formation and crack propagation was studied and characteristic examples are presented. The influence of the mechanical surface treatments on the electrochemical behavior was also investigated. To assess the consequences of near surface materials properties on the corrosion fatigue behavior, their stability during fatigue, in particular the relaxation of residual stress distributions introduced by mechanical surface treatments, was taken into account.

Corrosion–Fatigue Life Prediction for 2024-T62 Aluminum Alloy Using Damage Mechanics-Based Approach

2011 ◽  
Vol 21 (8) ◽  
pp. 1245-1266 ◽  
Author(s):  
W. P. Hu ◽  
Q. A. Shen ◽  
M. Zhang ◽  
Q. C. Meng ◽  
X. Zhang
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Fatigue Test ◽  
Corrosion Fatigue ◽  
Life Prediction ◽  
Damage Mechanics ◽  
Salt Spray ◽  
Fatigue Crack Initiation ◽  
Continuum Damage Mechanics ◽  
Fatigue Life Prediction

An approach based on the continuum damage mechanics was applied to predict corrosion–fatigue crack initiation life of 2024-T62 aluminum alloy. A fatigue test in air, a pre-corrosion–fatigue test, and a corrosion–fatigue test on smooth standard specimens were performed. The fatigue lives are strongly reduced by the corrosive environment of 5 wt.% NaCl continuous salt spray compared with non-corroded specimens. Damage evolution models for fatigue in air and pre-corrosion–fatigue of smooth specimens were established, which forms the basis for solving the corrosion–fatigue problem. Finally, the method of corrosion–fatigue life prediction was presented. The predictions comply with the experimental data.

scholarly journals Corrosion-fatigue lifetime of Aluminium–Copper–Lithium alloy 2050 in chloride solution

2015 ◽  
Vol 87 ◽  
pp. 681-692 ◽  
Author(s):  
M. Guérin ◽  
J. Alexis ◽  
E. Andrieu ◽  
C. Blanc ◽  
G. Odemer
Keyword(s):  
Corrosion Fatigue ◽  
Chloride Solution ◽  
Fatigue Lifetime ◽  
Lithium Alloy ◽  
Aluminium Copper

Corrosion fatigue behavior of FV520B steel in water and salt-spray environments

2017 ◽  
Vol 79 ◽  
pp. 422-430 ◽  
Author(s):  
Qaioguo Wu ◽  
Xuedong Chen ◽  
Zhichao Fan ◽  
Defu Nie ◽  
Renchao Wei
Keyword(s):  
Corrosion Fatigue ◽  
Fatigue Behavior ◽  
Salt Spray

scholarly journals Analysis of Corrosion-Fatigue Damage and Fracture Mechanism of In-Service Bridge Cables/Hangers

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Yao Guowen ◽  
Yang Shicong ◽  
Zhang Jinquan ◽  
Leng Yanling
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Damage ◽  
Corrosion Fatigue ◽  
Salt Spray ◽  
Bending Stress ◽  
Corrosive Environment ◽  
Element Analysis ◽  
Damage And Fracture ◽  
Steel Wires

Cables/hangers are important load-bearing components of suspension, cable-stayed, and through-arch bridges. Their reliability throughout their service life directly affects the safety of these bridges. In this study, to provide a reference for the design, maintenance, and inspection of bridge cables/hangers, their damage and failure mechanisms were theoretically analyzed using finite element analysis and corrosion-fatigue simulation tests of steel wires, based on the characteristics of the cable/hanger damage. The finite element analysis showed that a rotation of 0.00113 rad in the lower anchorage area results in a bending stress of 18.8 MPa, indicating that the effect of the bending stress on the steel wires in this area cannot be neglected, as it is a factor contributing to the failure of long cables/hangers. We further used a salt spray chamber to simulate an acid-rain environment. The results showed the following: (1) corrosion-fatigue damage of the cables/hangers occurs under the combined action of a corrosive environment and an alternating stress. This leads to an intensified corrosion damage, reduced ductility, increased brittleness, and eventually, brittle fracturing of the cables/hangers. (2) In the same corrosive environment, the highest degree of specimen corrosion occurred during alternating stress, followed by static stress, and no stress. (3) After corrosion-fatigue damage occurred for a specimen, its breaking stress was about 60% in comparison to the uncorroded specimen. The percentage elongation at the break also decreased; this was about 40% in comparison to the uncorroded specimen, indicating brittle fracturing. (4) The steel wires of the cables/hangers with corrosion-fatigue damage are more prone to brittle fracture if they are exposed to complex spatial stresses.

Chemical-heat treatment of 08Kh18N10T steel to improve its performance

2021 ◽  
pp. 419-421
Author(s):  
A.A. Krasulya ◽  
A.A. Permitina ◽  
A.S. Pomel'nikova ◽  
S.G. Tsikh
Keyword(s):  
Corrosion Resistance ◽  
Saline Solution ◽  
Salt Spray ◽  
Boride Layer ◽  
Structure And Properties ◽  
Chemical Heat Treatment ◽  
Spray Chamber ◽  
Chemical Heat ◽  
08Kh18n10t Steel ◽  
Resistance Tests

Effect of liquid boriding on the structure and properties of 08Kh18N10Т steel is studied by metallographic studies. The dependence of the phase ratio in the boride layer on holding time is established. Corrosion resistance tests in 5 % saline solution and in salt spray chamber are performed. It is shown that the corrosion resistance of 08Kh18N10Т steel practically does not deteriorate after liquid boriding.

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