Abstract
Neutron diffraction has been used to measure the residual-stress field in MIG-welded Al-2024 and Al-7150 aluminium alloy compact-tension (CT) specimens. The measurements were made on the POLDI time-of-flight diffractometer, which uses a multiple frame overlap method. Strains in the three principal directions of each specimen were determined from the measured lattice plane spacing as a function of position through the weld relative to stress-free reference lattice plane spacings obtained from a comb-like reference sample. The resultant calculated residual stresses are compared to those existing in the original welded plate from which the specimens were machined.
| Original language | English |
|---|---|
| Pages (from-to) | 46-53 |
| Number of pages | 8 |
| Journal | Materials Science and Engineering A |
| Volume | 437 |
| Issue number | 1 |
| Early online date | 23 Jun 2006 |
| DOIs | |
| Publication status | Published - 10 Nov 2006 |
| Externally published | Yes |
Funding
This work was funded by EPSRC under grant GR/N14293. The authors would like to thank the Cranfield University Weld Engineering Group for providing the welded specimens and Tim Gough and Peter Ledgard of the Open University for helping in the comb sample preparation. The authors also wish to acknowledge useful discussions with Dr. Javier Santisteban and Dr. Supriyo Ganguly and finally would like to thank PSI and the EU for provision of the neutron beam time.
Keywords
- Aluminium alloys
- MIG welding
- Neutron diffraction
- Residual stress
- Time-of-flight
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering