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Norm

ISO 7539-6:2011

Issue date: 2011 10 10

Corrosion of metals and alloys — Stress corrosion testing — Part 6: Preparation and use of precracked specimens for tests under constant load or constant displacement

ISO 7539-6:2011 covers procedures for designing, preparing and using precracked specimens for investigating susceptibility to stress corrosion. It gives recommendations f...
Withdrawn: 2018 08 22

ISO 7539-6:2011 covers procedures for designing, preparing and using precracked specimens for investigating susceptibility to stress corrosion. It gives recommendations for the design, preparation and use of precracked specimens for investigating susceptibility to stress corrosion.

The term "metal" as used in ISO 7539-6:2011 includes alloys.

Because of the need to confine plasticity at the crack tip, precracked specimens are not suitable for the evaluation of thin products, such as sheet or wire, and are generally used for thicker products including plate bar and forgings. They can also be used for parts joined by welding.

Precracked specimens can be loaded with equipment for application of a constant load or can incorporate a device to produce a constant displacement at the loading points. Tests conducted under increasing displacement or increasing load are dealt with in ISO 7539-9.

A particular advantage of precracked specimens is that they allow data to be acquired from which critical defect sizes, above which stress corrosion cracking can occur, can be estimated for components of known geometry subjected to known stresses. They also enable rates of stress corrosion crack propagation to be determined. The latter data can be taken into account when monitoring parts containing defects during service.

ISO 7539-6:2018
2018 08 22
Corrosion of metals and alloys — Stress corrosion testing — Part 6: Preparation and use of precracke...
Norm
ISO 7539-6:2011
2011 10 10
Corrosion of metals and alloys — Stress corrosion testing — Part 6: Preparation and use of precracke...
Norm
ISO 7539-6:2003
2003 02 06
Corrosion of metals and alloys — Stress corrosion testing — Part 6: Preparation and use of pre-crack...
Norm
ISO 7539-6:1989
1989 12 21
Corrosion of metals and alloys — Stress corrosion testing — Part 6: Preparation and use of pre-crack...
Norm
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Norm
ISO 7539-6:2018
Issue date : 2018 08 22
Corrosion of metals and alloys — Stress corrosion testing — Part 6: Preparation and use of precracked specimens for tests under constant load or constant displacement (Corrected version 2018-11)