| Autor: |
Ayumi SHIRO, Tatsuya OKADA, Takahisa SHOBU |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Mechanical Engineering Journal, Vol 7, Iss 2, Pp 19-00634-19-00634 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2187-9745 |
| DOI: |
10.1299/mej.19-00634 |
| Popis: |
X-ray diffraction experiments were carried out to non-destructively study the interior of aluminum single crystals at the pre-deformation, post-deformation and post-annealing stages using synchrotron radiation at SPring-8. Single crystals were grown by the Bridgman method. The as-grown samples were not perfect from the crystallographic perspective, but were composed of several sub-grains with misorientations smaller than 1° across the sub-boundaries. Although the difference in orientation in the cross section of the sample increased about 0.7° by the application of the nominal strain of 8% in tension along the direction, the sub-grain structures remained largely unchanged. No evidence was found of the local accumulation of dislocations at the sub-boundaries. The orientation map of the deformed sample clearly shows that no non-uniformly deformed regions formed inside the sample. The level of residual strain calculated by the strain-scanning method was as low as 1×10-4. After annealing at 480 °C, the whole cross section of the center of the sample was covered by a single recrystallized grain. Although the resolution of the present experiments was insufficient to observe potential nucleation sites of recrystallized grains in -oriented crystals, a possible candidate for the sites may be assumed at the intersections of certain types of slip bands. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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