Destructive test methods are those that cause damage or permanent alteration to the specimen being tested.
* Radiography:
* Non-destructive method using X-rays or gamma rays to view the internal structure.
* Acoustic Emission:
* Non-destructive technique detecting transient elastic waves produced by a sudden redistribution of stress.
* Corrosion:
* Destructive process where materials are degraded due to chemical reactions with their environment.
* Magnetic Particle:
* Non-destructive method using magnetic fields to detect surface and near-surface discontinuities.
Corrosion testing inherently destroys or alters the material being tested, categorizing it as a destructive method.
References: Materials testing standards and non-destructive testing (NDT) handbooks.