Wire Inspection/Testing

Identify and eliminate defective wire before it is formed.

By Frank Passarelli, Resonic Technologies Ventura, CA, USA • www.resonicndt.com

There has long been a need in industries that use wire of various alloys in forming and forging operations. Most wire unless highly processed, an expensive and energy-intensive process, has defects both on the surface and internally that when formed into a near finished component either fracture due to the forming stresses or fracture during subsequent processing operations. Tooling wear and damage are directly affected by nonconforming materials.

There are several existing technologies including both eddy current and water coupled ultrasonics in use that are either ineff ective in finding a number of material defects or are too expensive or cumbersome to use in daily header machine operations. The technology has evolved from early work conducted at NIST (National Institute of Standards and Technology), into a commercially viable and proven industrial test methodology. The technique is now in use, where it’s providing a cost effective measurement solution with operating simplicity similar to process monitors.

Measurement capability extends from the surface to the deep interior. Additionally, microstructure variation information such as decarb, grain size irregularities and process variations is available.

Discontinuities such as cracks, seams and button defects, detailed by ASTM F2282 as well as localized modulus or elastic properties variations can be selectively detected.

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Wire Testing