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Norm

ÖNORM EN ISO 7539-2

Issue date: 1995 08 01

Corrosion of metals and alloys - Stress corrosion testing - Part 2: Preparation and use of bent-beam specimens (ISO 7539-2:1989)

1 .l This part of ISO 7539 covers procedures for designing, preparing and using bent-beam test specimens for investigating the susceptibility of a metal to stress corro...
Valid
1 .l This part of ISO 7539 covers procedures for designing, preparing and using bent-beam test specimens for investigating the susceptibility of a metal to stress corrosion. The term metal as used in this part of ISO 7539 includes alloys. 1.2 Bent-beam specimens may be used to test a variety of product forms. They are used principally for sheet, plate or flat extruded material, which conveniently provides flat specimens of rectangular Cross-section, but may also be employed for cast material, wire or rod, or for machined specimens of circular Cross-section. They tan also be used for Parts joined by welding. 1.3 Since the preparation of the specimens and the apparatus used for stressing them are both simple and inexpensive, bent-beam specimens are especially suitable for multiple testing and for atmospheric stress corrosion tests. 1.4 Bent-beam specimens are usually tested under nominally constant strain conditions but nominally constant load conditions may be employed. In either case local Change of curvature in the specimen when cracking occurs results in changing conditions during Crack propagation. The ¿test stress¿ is taken as the highest surface tensile stress existing at the statt of the test.
Norm
ISO 7539-1:1987
Issue date : 1987 08 20
Corrosion of metals and alloys — Stress corrosion testing — Part 1: General guidance on testing procedures
Norm
ISO 7539-4:1989
Issue date : 1989 12 07
Corrosion of metals and alloys — Stress corrosion testing — Part 4: Preparation and use of uniaxially loaded tension specimens
Norm
ISO 7539-2:1989
Issue date : 1989 12 07
Corrosion of metals and alloys — Stress corrosion testing — Part 2: Preparation and use of bent-beam specimens