Ultrasonic Flaw Detection is a non-destructive testing method used to identify internal defects in materials. It employs high-frequency sound waves that are transmitted into the material. When these waves encounter a flaw, such as a crack or void, they are reflected back to the surface, allowing technicians to analyze the data and determine the presence and size of the defect. This technique is widely used in various industries, including aerospace, automotive, and construction, due to its accuracy and ability to inspect complex shapes. Ultrasonic testing can be applied to metals, plastics, and composites, making it a versatile tool for ensuring material integrity.