Hill Engineering will be presenting at the 2024 Turbine Engine Technology Symposium in Dayton, OH, from September 9th through September 12th. We invite you to come see us. The TETS symposium gathers approximately 1,000 engineers, scientists, managers, and operation personnel from throughout the turbine engine community every two years to review and discuss the latest turbine engine technology advances. Hill Engineering’s presentation will include a summary of recent work related to residual stress measurement on bearings using the TrueSlot® method. The abstract text is presented below.
Continue reading 2024 Turbine Engine Technology Symposium (TETS)
Tag: TrueSlot
On the Road with the Residual Stress Field Team
In the ever-evolving landscape of materials science and engineering, on-site solutions are an important component of residual stress testing. That’s why we at Hill Engineering have a dedicated residual stress field team, capable of traveling directly to customers’ locations in order to deliver the same precision and data quality of our in-house residual stress measurements.
Continue reading On the Road with the Residual Stress Field TeamTrueSlot® – near surface residual stress measurement
TrueSlot® is an innovative technique for measuring near-surface residual stress that is more reliable than conventional techniques.
TrueSlot® is a residual stress measurement technique for generating a profile of residual stress versus depth from the material surface. The stress computation is similar to slitting but offers more sensitivity near the surface due to the proximity of the strain gage.
Additionally, TrueSlot® is globally less invasive than slitting because the volume of removed material is localized to the surface and does not typically extend through most of the specimen thickness.
The physical application of TrueSlot® is like hole drilling, however instead of a shallow hole being milled into the body of a specimen containing residual stress, the material removed is a shallow slot. The strain released with each incremental slot depth is measured near the slot using a strain gage.
TrueSlot® is useful for
- Production quality control applications
- Applications requiring in-field measurements with portable equipment
- Near-surface residual stress determination
- Parts with large or complex geometry
- Applications with challenging measurement access
- Applications requiring rapid turn time
TrueSlot® was found to have better repeatability when compared with conventional x-ray diffraction.
You can read about our repeatability study here.
TrueSlot® measurements are performed using our DARTTM system for automated residual stress measurement.