Mechanical surface treatment technologies such as laser peening and cavitation peening require detailed characterization, including residual stress analysis, to optimize their processing parameters. Recent developments at neutron facilities allow non-destructive 2-dimensional residual strain mapping through Bragg edge imaging, which provides specific advantages over more established methods. The present work highlights the application of Bragg edge neutron imaging for the study of mechanical surface treatments, through determination of lattice spacing distributions by energy-resolved radiography. Through three different examples, the unique capabilities of the method are demonstrated, particularly for providing near surface residual strain maps within samples with complex geometries with relatively high spatial resolution. By providing a comparison with X-ray diffraction and neutron diffraction results, the present work emphasizes the potential of Bragg edge neutron imaging as a tool for surface treatment research.
|Number of pages||12|
|Early online date||15 Aug 2022|
|Publication status||Published - 15 Oct 2022|
Bibliographical noteThis is an open access article under the CC BY license.
RSR would like to acknowledge STFC for their support through the sponsored PhD program under ISIS facility development studentship. The authors are grateful for beam time provision on IMAT, ISIS, UK (10.5286/ISIS.E.RB1820631; 10.5286/ISIS.E.RB1910464), RADEN, MLF, Japan (Proposal No. 2018A0155), and SALSA, ILL, France (10.5291/ILL-DATA.1-02-315). This research was partly supported by JSPS KAKENHI, grant numbers 18KK0103 and 20H02021. MEF is grateful for funding from the Lloyd's Register Foundation, a charitable foundation helping to protect life and property by supporting engineering- related education, public engagement and the application of research.
- Bragg edge
- Cavitation peening
- Laser peening
- Neutron imaging
- Residual stress
- Surface treatment
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys