Abstract
By diffraction of high-energy synchrotron X-rays, the variance of the axial lattice strains of individual grains is measured during tensile loading of a weakly textured copper polycrystal. Peak profiles are measured for {440} reflections arising from 20 bulk grains, all of which are at least one average grain diameter below the surfaces within a 0.2-mm thick specimen. The reflecting lattice planes are all perpendicular to the tensile axis. The variance in lattice strain between grains can therefore be attributed to differences in the boundary conditions imposed by the different sets of neighboring grains. The results are compared to finite-element modelling (FEM). Up to the highest applied strain of 2%, the experimental and FEM values are in fair agreement and the standard deviations may be roughly approximated as 6% of the average axial lattice strains.
| Original language | English |
|---|---|
| Pages (from-to) | 4461-4467 |
| Number of pages | 7 |
| Journal | Acta Materialia |
| Volume | 52 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 2004 Sept 6 |
Bibliographical note
Funding Information:We thank Brian Carroll for software developments, D. Haeffner for continuous support, and P.B. Olesen, H. Nielson and P. Nielsen for sample preparation. We acknowledge the Danish National Research Foundation for supporting the Center for Fundamental Research: Metal Structures in Four Dimensions, within which part of this work was performed. Additional support was provided by the Danish research council SNF (via Dansync) and by the AFOSR under Grant F49620-02-0047. Use of the Advanced Photon Source was supported by the United States Department of Energy, Office of Science, Office of Basic Energy Science, under contract number W-31-109-Eng-38. Simulations were performed at the Cornell Theory Center.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys