Nondestructive evaluation (NDE) techniques are concerned with detecting inhomogeneities in materials and characterizing their properties without causing any damage to the materials.

• 无损检测是在不损害或基本不损害材料或构件的情况下采用物理、化学等方法和手段，探测被检对象内部和表面的各种缺陷及某些物理性能。