Quality Magazine

Resonant Inspection ASTM Standard Revised and Released

June 18, 2009

CINCINNATI - ASTM E2001-8 “Standard Guide for Resonant Ultrasound for Defect Detection in Both Metallic and Non-Metallic Parts” has been revised and released. Standardizing resonant inspection nondestructive testing across different organizations, companies, and countries to be able to have meaningful comparison and consistency for the technique is the express purpose of the new standard. ASTM E2001-8 allows end user companies to more easily specify resonant inspection as a standardized technique and be assured that regardless of the vendor, the application of the technique will be consistent.

Resonant ultrasound spectroscopy (commonly referred to as resonant inspection) based NDT techniques all vibrate a part mechanically and detect defects based upon measurable changes in the given part’s resonant frequency pattern. These techniques have become commonly used for quality inspection in the manufacture of steel, sintered and ceramic parts.

The standard describes a procedure for detecting defects in parts using resonance. The procedure describes a whole body resonant technique used to distinguish acceptable parts from those containing defects such as cracks, voids, chips, density defects, tempering changes, and dimensional variations. The primary advantage of resonant inspection is making numerous measurements in a single test. It can work on parts at any stage of manufacturing process, no part preparation required, and RI can work with any material that exhibits a resonant response.

Resonant Acoustic Method (NDT-RAM) technique has proven effective for many manufacturers in a variety of industries, including aerospace, automotive, consumer goods, and medical devices. NDT-RAM is ideal for manufacturers that have substantial inspection cost, require 100% inspection, produce or use safety-critical parts, have substantial scrap costs due to false rejects, or simply want to improve their part quality. With no part preparation required, this technique can successfully identify internal and external flaws due to cracks, voids, material density, dimensions, porosity and nodularity as well as missed manufacturing processes.

Free parts tests are offered for feasibility testing of your parts and system rentals are available allowing customers to try the system in their facility before buying.