Year: 2024
Type: article
Abstract: in Sweden and the European Synchrotron Radiation Facility (ESRF) has developed a non-destructive method for mapping the three-dimensional stress distribution inside plastically deformed metallic materials using x-rays.The sample studied is a plastically deformed polycrystalline aluminum alloy AA1050.The experiments were performed at the ESRF synchrotron beamline ID11 using 48.5 keV microbeam x-rays (3 μm × 3 μm) and the sample was mounted on a device integrating a tensile tester and a diffraction goniometer.Using the Debye-Scherrer camera principle, x-ray diffraction spots from the sample are recorded by a two-dimensional x-ray detector.The stress-strain curve of the AA1050 alloy is measured in situ and the relationship between deformation and fracture is studied under plastic deformation conditions, where a load of approximately 85 MPa is applied and the alloy is elongated by 32%, which is close to the ultimate elongation.Microbeam xrays are scanned over the sample in the XY direction to obtain x-ray diffraction data for many different points on the sample.In addition, a rotational scan is performed to collect data at many different projection angles, even at the same point of x-ray exposure.Thus, using the same image reconstruction method as x-ray computed tomography, three-dimensional data on crystal structure and stress distribution can be obtained.
Source: X-Ray Spectrometry
DOI: 10.1002/xrs.3457
Author: Kenji Sakurai
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4403222535