Effect of temperature on crack growth rates of stress corrosion cracks in metal alloys exposed to water

Book · Sun Dec 01 00:00:00 EST 1996

OSTI ID:397836

Vogt, H; Speidel, M O ^[1]

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1. Swiss Federal Inst. of Tech., Zuerich (Switzerland). Inst. of Metallurgy

The effect of temperature on stress corrosion crack growth rates was studied using four commercial alloys: an Al-Mg-Zn alloy (7000-Series), an Al-Cu alloy (2000-Series), a Mg-rare earth alloy and a Zr 2.5% Nb alloy. Stress Corrosion crack growth rate data were obtained using fracture mechanic specimens which were tested in high purity water in the temperature range of {minus}10 C to 320 C, depending on the alloy. Attention was directed towards region 2 behavior, where the crack propagation rate is independent of stress intensity but sensitive to test temperature. The experimental activation energies of the different alloys were compared with literature on rate-controlling steps in order to identify the possible stress corrosion cracking mechanisms. The results were also compared with the activation energies obtained from general corrosion and hydrogen diffusion experiments.

• OSTI ID: 397836
• Report Number(s): CONF-960389-; TRN: 96:029928
• Resource Relation: Conference: National Association of Corrosion Engineers (NACE) annual corrosion conference and exposition: water and waste water industries, Denver, CO (United States), 24-29 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of Corrosion/96 conference papers; PB: [6615] p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
STRESS CORROSION
FRACTURE PROPERTIES
ZINC ALLOYS
COPPER ALLOYS
MAGNESIUM ALLOYS
YTTRIUM ALLOYS
NEODYMIUM ALLOYS
ZIRCONIUM ALLOYS
HAFNIUM ALLOYS
NIOBIUM ALLOYS
CHROMIUM ADDITIONS
MANGANESE ADDITIONS
IRON ADDITIONS
SILICON ADDITIONS
CHEMICAL COMPOSITION
CRACKS
CRACK PROPAGATION
ACTIVATION ENERGY
FRACTURE MECHANICS
STRESS INTENSITY FACTORS
TEMPERATURE DEPENDENCE
EXPERIMENTAL DATA