scholarly journals Effect of the Chemical Composition on the Mechanical Properties and Stress Corrosion Cracking Sensitivities of High-Strength Al-Zn-Mg Alloy.

2000 ◽  
Vol 49 (1) ◽  
pp. 86-91 ◽  
Author(s):  
Masakazu HIRANO ◽  
Kazunori KOBAYASI ◽  
Hideki TONDA
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength ◽  
Corrosion Cracking ◽  
Mg Alloy

scholarly journals THE INFLUENCE OF MICROSTRUCTURAL FACTORS AND HEAT TREATMENT ON THE CORROSION RESISTANCE OF REINFORCING STEEL CLASS A 600

2018 ◽  
Vol 22 (2) ◽  
pp. 52-63 ◽  
Author(s):  
N. N. Sergeev ◽  
V. V. Izvol'skiy ◽  
A. N. Sergeev ◽  
S. N. Kutepov ◽  
A. E. Gvozdev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Corrosion Resistance ◽  
Chemical Composition ◽  
Carbon Content ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Steel Reinforcement ◽  
Reinforcing Steel

Currently, hot rolled bar reinforcement class A600 of low-alloy steels in the delivery condition has a high tendency to this very specific kind of destruction as stress corrosion cracking under tension (SCC). However, there are cases of collapse of pre-stressed concrete structures, in most cases initiated corrosion cracking under stress, put the problem this type of fracture is particularly acute. In stress corrosion cracking cracks occur, the occurrence of which depends not only on the structural state of the material, the type and level of stress, but also on the degree of aggressiveness of the environment in which the operation occurs. In this regard, it is very important to establish how the corrosion resistance of class A600 reinforcing steel varies depending on the change in the chemical composition, microstructure, the level of applied and residual micro-stresses, and various modes of heat treatment. The purpose of this paper is to study the effect of the above factors on the resistance of low-alloyed reinforcing steel class A600 stress corrosion cracking It is shown that the sensitivity of the reinforcement to stress corrosion cracking is largely determined by the chemical composition (mainly carbon content), the type of microstructure and the level of residual micro-stresses. The influence of heat treatment regimes on the corrosion resistance of A600-grade reinforcing steel in nitrates solutions is investigated. It is shown that the use of additional heat treatment (normalization and improvement) increases the corrosion resistance of steel. High corrosion resistance steel reinforcement has only a carbon content at the lower limit of the vintage composition, which is provided by the structure of homogeneous bainite with mechanical properties at the level of strength class A600. With higher mechanical properties, the steel reinforcement has lower corrosion resistance.

An approach to the evaluation of stress-corrosion of high strength steels

1981 ◽  
Vol 8 (4) ◽  
pp. 416-424
Author(s):  
Fernand Ellyin ◽  
Rafik A. Matta
Keyword(s):  
Mechanical Properties ◽  
Stress Corrosion ◽  
Ultimate Strength ◽  
Stress Corrosion Cracking ◽  
High Strength Steels ◽  
High Strength ◽  
Corrosion Cracking ◽  
Field Observations ◽  
Concrete Construction ◽  
Corrosive Environments

Experiments have been conducted on high strength prestressing and bridge wires (zinc-coated) to assess their susceptibility to stress-corrosion cracking (SCC). The wires were subjected to various stress levels and corrosive environments. Loss of ductility and reduction in the ultimate strength of these materials are determined. A criterion is then proposed to evaluate the susceptibility to stress-corrosion by means of an index based on the observed mechanical properties of the wires. Further experiments were carried out on another high-strength bridge wire to validate the proposed approach.Based on the experimental and field observations, the proposed method could be applied to select the type of wire used in pre- or post-tensioned concrete construction or in other applications to ensure better protection against SCC.

Stress Corrosion Cracking of High Strength Skills. Abstract Only

1999 ◽  
Author(s):  
Eun Lee ◽  
Henry Sanders ◽  
Bhaskar Sarkar
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength ◽  
Corrosion Cracking

Stress Corrosion Cracking of High Strength Steels

1995 ◽  
Author(s):  
Eun U. Lee ◽  
Henry Sanders ◽  
Bhaskar Sarkar
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength Steels ◽  
High Strength ◽  
Corrosion Cracking
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