GB/T 15970.6-1998
Corrosion of metals and alloys--Stress corrosion testing--Part 6: Preparation and use of pre-cracked specimens (English Version)

Standard No.: GB/T 15970.6-1998
Language: Chinese, Available in English version
Release Date: 1998
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2007-12
Replace By: GB/T 15970.6-2007
Latest: GB/T 15970.6-2007

Scope: This standard covers the design, preparation and use of pre-cracked test specimens for the study of stress corrosion susceptibility. Recommendations for notched specimens are given in Appendix A (an appendix to the standard). The term "metal" as used in this standard also includes alloys. Because of the requirement to maintain elastic restraint at the crack tip, pre-cracked specimens are not suitable for evaluating thin or thin materials such as sheet or wire. Usually only suitable for evaluating thicker or coarser materials such as thick plates, rods and forgings. Pre-cracked specimens are also suitable for weldments. Pre-cracked specimens may be loaded quantitatively using a constant load device or a monotonically increasing load device, or in conjunction with a device that produces a constant displacement of the point of application. The outstanding advantage of the pre-cracked sample is that the limit defect size of the known geometric shape and the known stress member can be calculated from the measured data. If the defect size exceeds the limit value, stress corrosion cracking will occur. Pre-cracked specimens can also determine the growth rate of stress corrosion cracks.

GB/T 15970.6-1998 history

2007 GB/T 15970.6-2007 Corrosion of metals and alloys.Stress corrosion testing.Part 6: Preparation and use of pre-cracked specimens for tests under constant load or constant displacement
1998 GB/T 15970.6-1998 Corrosion of metals and alloys--Stress corrosion testing--Part 6: Preparation and use of pre-cracked specimens