Portable Near Surface Stress Measurement Backed By An Industry Standard
Hole Drilling measures near-surface residual stress, and has been standardized in ASTM as E837. The method can be applied to quantify the average residual stress over the depth of a drilled hole (typically 1.0 mm depth). Or, it can be applied to determine the distribution of residual stress versus depth from the surface to a depth of half the hole diameter. Hole Drilling is portable, and is a common method for residual stress measurement that can be applied under a variety of circumstances, including in the field. Hill Engineering has extensive experience with Hole Drilling, and a reputation for providing high-quality data and precise installation of instrumentation. Hole Drilling measurements are performed in our laboratory or at your site, to your specifications. Our laboratory maintains an active ISO/IEC 17025 accreditation for hole drilling.
Hole Drilling is Useful For
- Applications requiring in-field measurements with portable equipment
- Near-surface residual stress determination (to depth of 2.0 mm)
- Measuring multiple stress components (in-plane principal stresses)
- Parts with large or complex geometry
- Applications with challenging measurement access
- Applications requiring rapid turn time
External Materials
A Hole Drilling measurement on a shot-peened Ti-6Al-4V test specimen
Illustration of a Hole Drilling measurement
An incremental Hole Drilling residual stress measurement according to ASTM E837 on an aluminum forging.
Results from a Hole Drilling measurement on a shot peened aluminum alloy test specimen. Hole Drilling provides in-plane residual stress versus depth from the surface.
A Hole Drilling measurement repeatability comparing the results from six independent measurement trials.