About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
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12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
|
Presentation Title |
The Indentation Size Effect in Mg Alloys |
Author(s) |
Warren J. Poole, Shuheng Li, Ghazal Nayyeri |
On-Site Speaker (Planned) |
Warren J. Poole |
Abstract Scope |
Instrumented indentation tests have received considerable recent attention for measuring the activity of slip systems in magnesium alloys. This approach has the advantage that single crystals are not required as tests can be conducted on polycrystalline samples. In this study, a range of magnesium alloys has been studied using instrumented indentation with a range of indenter tip radii from 1-250 μm. The indentation force-displacement curves were converted to indentation stress-strain curves using the approach of Kalidindi and co-workers. It was observed that there was a strong dependence of the indentation yield stress on the radius of indenter tip. A dislocation theory based model was developed to analyze the size effect. It was found that by extrapolating to an infinite indenter radius and calculating the resolved shear stress under the indenter, the critically resolved shear stress values obtained were in strong agreement with experimental results from single crystal. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |