Basics
Emulsifiers
When removal of the penetrant from a defect due to over-washing of the part is a concern, a…
August 24, 2021 · Prabhu TLBasics
Basics
Removability
Removing the penetrant from the surface of the sample, without removing it from the flaw, is one of…
August 24, 2021 · Prabhu TLBasics
Dimensional Threshold of Fluorescence
The dimensional threshold of fluorescence is a property that is not currently controlled by the specifications but appears…
August 24, 2021 · Prabhu TLBasics
Penetrant Testing Materials
The penetrant materials used today are much more sophisticated than the kerosene and whiting first used by railroad…
August 24, 2021 · Prabhu TLBasics
Where Is Non-Destructive Testing Used?
Depending on how broadly you define NDT you could say that it’s used in almost every industry in…
August 24, 2021 · Prabhu TLBasics
What Is NDT—A Closer Look
We’ve already covered what NDT stands for and how the phrase is used in the field. Now let’s…
August 24, 2021 · Prabhu TLBasics
The Benefits of Laser-Based Inspection
Lasers have been used in the welding industry for over 30 years for seam-tracking while welding, for inspection…
August 24, 2021 · Prabhu TLBasics
Laser-based inspection
Laser shearographyLaser shearography uses an interferometer to detect the out-of-plane derivative of deformation of the subject due to…
August 24, 2021 · Prabhu TLBasics
Erosion corrosion
Erosion corrosion is the corrosion of a metal which is caused or accelerated by the relative motion of…
August 24, 2021 · Prabhu TLBasics
Basic Principles of Liquid Penetrant Inspection
Liquid penetrant inspection (LPI), also known as dye penetrant inspection (DPI) or penetrant testing (PT), was first developed…
August 24, 2021 · Prabhu TL