文档介绍：Introduction to Nondestructive Testing Outline ? Introduction to NDT ? Overview of Six Most Common NDT Methods ? Selected Applications The use of noninvasive techniques to determine the integrity of a material, component or structure or quantitatively measure some characteristic of an object. . Inspect or measure without doing harm. Definition of NDT Methods of NDT Visual Liquid rant ic Particle Eddy Current Ultrasonic X-ray Microwave Acoustic Emission Thermography Laser Interferometry Replication Flux Leakage Acoustic Microscopy ic Measurements Tap Testing What are Some Uses of NDE Methods? ? Flaw Detection and Evaluation ? Leak Detection ? Location Determination ? Dimensional Measurements ? Structure and Microstructure Characterization ? Estimation of Mechanical and Physical Properties ? Stress (Strain) and Dynamic Response Measurements ? Material Sorting and position Determination Fluorescent rant indication When are NDE Methods Used? – To assist in product development – To screen or sort ing materials – To monitor, improve or control manufacturing processes – To verify proper processing such as heat treating – To verify proper assembly – To inspect for in-service damage There are NDE application at almost any stage in the production or life cycle of ponent. There are NDE application at almost any stage in the production or life cycle of ponent. Six mon NDT Methods ? Visual ? Liquid rant ? ic ? Ultrasonic ? Eddy Current ? X-ray Most basic mon inspection method. Tools include fiberscopes, borescopes, magnifying glasses and mirrors. Robotic crawlers permit observation in hazardous or tight areas, such as air ducts, reactors, pipelines. Portable video inspection unit with zoom allows inspection of large tanks and vessels, railroad tank cars, sewer lines. Visual Inspection ? A liquid with high surface wetting characteristics is applied to the surface of the part and allowed time to seep into surface breaking defects. ?