Residual Stress Measurement
Residual Stress Measurement determines if your critical components can withstand the load and stress conditions of operations.
Lambda is a recognized leader in the field of residual stress measurement, with extensive experience testing all types of materials, including metallics, ceramics, and polymers of nearly any shape and size.
- Custom state-of-the-art test equipment designed and built by our in-house technical team
- Components can be tested in our laboratory or in the field
- All residual stress measurements are performed by our certified residual stress engineers and technicians
- Decades of testing experience
- Both x-ray diffraction and mechanical residual stress available allowing for best option to be chosen for a given application
With more than half a million completed measurements and over 100 technical papers published, Lambda is a recognized leader in materials testing and research. Authors of the American Society for Metals “X-ray Diffraction Residual Stress Techniques.”
X-Ray Diffraction
X-Ray Diffraction (XRD) is the method of choice for the highest resolution measurement of surface and near-surface residual stress, where most stress-related cracking occurs. XRD is the only method available to obtain a true surface residual stress measurement. It can provide measurement of residual stress in multiple directions and can be used to produce maps and high-resolution incremental depth profiles.
Ring Core
Ring core is a mechanical residual stress measurement method based on the introduction of an annular groove around a strain gauge rosette. Ring core allows for determination of principal residual stress with depth.
Hole Drilling
Hole-drilling is a widely used mechanical residual stress measurement technique based on the introduction of a relatively small hole at the center of a strain gauge rosette designed for this method. Hole-drilling allows for determination of principal residual stress with depth.
Slotting or Slitting
Slotting is a mechanical residual stress measurement method based on the introduction of a slot adjacent to a strain gauge. Slotting allows for determination of residual stress in one direction.
Deep Hole Drilling
The deep hole drilling (DHD) technique is a mechanical method based on the diametral measurement of a reference hole before and after coring around the hole. It is used to measure through-thickness principal residual stresses in most parts. DHD is particularly useful for characterizing stresses from processes such as additive manufacturing, welding, heat treatment, casting, and forging in thick cross-sections.
Tube splitting
Tube splitting is a mechanical sectioning technique requiring the splitting of a tube and using the change in diameter to assess the hoop residual stress.
Sectioning
Residual stress measurement using bulk sectioning generally describes any method where the part is sectioned by a series of predetermined cuts to relax the majority of the bulk residual stresses. Strain gauges are affixed to the areas of interest to monitor strain relaxation and determination of the residual stress.
Lambda is a recognized leader in the field of residual stress measurement, with extensive experience testing all types of materials, including metallics, ceramics, and polymers of nearly any shape and size.
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- -We can test components in our laboratory or in the field
- -Lambda does not subcontract residual stress testing to a third party
- -All residual stress measurements are performed by our certified residual stress engineers and technicians
Lambda’s testing laboratory is accredited to ISO/IEC 17025 by The American Association for Laboratory Accreditation (A2LA). Where applicable, our testing meets the standards of ASTM, SAE, NACE, ECS, and API.
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