Residual stress in a material can be caused by a number of actors, including fabrication errors, heat treatment and welding (link to welding test page). Our residual stress measurement services help determine the extent of stress in a material, and when it is no longer safe for use.
Residual stress is a critical flaw, contributing to external stress and putting additional burden on a product or material. When the amount of stress in a material exceeds its yield strength (link to tensile page), defects or failures can occur. Residual stress can also be caused during processing operations, such as milling, annealing or machining.
Residual Stress Measurement Services
We offer several methods for residual stress measurement, helping to ensure that the materials used in aerospace (link), construction, transportation and other critical industries are safe and fit for purpose. With extensive experience in residual stress measurement, our experts can work with you to create a testing program that meets the unique needs of your materials, whether in one of our state-of-the-art labs, or on-site at your project.
Some of the residual stress methods that we offer include:
- Strain Gaging
- Barkhausen Noise Analysis
Our Residual Stress Measurement Methods
We commonly perform a variety of residual stress measurement methods, including XRF, strain gaging and Barkhausen noise analysis.
Strain Gage Techniques
Our labs use the methods outlined in ASTM E837 to measure residual stress by applying strain gages to a material.
X-Ray and XRD Techniques
By using a variety of x-ray methods, including XRD, we are able to use a material’s atomic properties to determine the amount of stress in a sample.
Barkhausen Noise Analysis (American Stress Tech. Microscan)
A Barkhausen Noise Analysis is an effective, non-destructive way to take qualitative measurements of residual stress in ferro-magnetic materials.
Other Residual Stress Measurement Techniques
For failures and more complicated projects, our experts can work with you to create a program that fits your needs, often combining multiple techniques into a single test program.
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