Abstract
In situ synchrotron microbeam x-ray diffraction experiments were carried out to study the microscopic deformation within individual ferrite grains in a martensite/ferrite dual-phase steel (DP980) under incremental tensile loading. The differential aperture x-ray microscopy technique was used to resolve the strain variations as a function of depth up to 100 μm deep from the sample surface. The highly inhomogeneous distributions of the lattice strain, which is associated with the elastic deformation and stresses inside the grains, were determined by means of monochromatic energy diffraction, whereas insights to the plastic deformation were revealed by polychromatic energy diffraction.
| Original language | English |
|---|---|
| Pages (from-to) | 21-28 |
| Number of pages | 8 |
| Journal | JOM |
| Volume | 65 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2013 |
Funding
This research was sponsored by the U.S. Department of Energy (DOE), Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies as part of the Lightweight Materials Program, and by the DOE Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract DE-AC05-00OR22725 with UT-Battelle, LLC. The work benefited from the use of the Advanced Photon Source, supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The authors acknowledge the assistance of Dongxiao Qiao of Oak Ridge National Laboratory in DIC data analysis and Wei Wu of the University of Tennessee in supporting the experiment.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | |
| Office of Science | |
| Office of Energy Efficiency and Renewable Energy | |
| Basic Energy Sciences | DE-AC02-06CH11357 |
| Vehicle Technologies Office | |
| Division of Materials Sciences and Engineering | DE-AC05-00OR22725 |