| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1578307 | Materials Science and Engineering: A | 2011 | 4 Pages |
The acoustic emission (AE) technique has been applied to in situ investigations of deformation processes of polycrystalline magnesium with various grain sizes in tension and compression from 20 to 300 °C. The AE signal of twin nucleation exhibited an asymmetry corresponding to the tension–compression flow stress asymmetry due to easier {1 0 1¯ 2} twinning in compression. A maximum in the AE signal is observed at 200 °C and is interpreted as a consequence of the synergetic effect of twinning and greater slip activity at higher temperatures. A larger grain size (600 μm) facilitated twinning.
► Significant tension–compression asymmetry remarkable also on acoustic emission response. ► Maximum of twinning activity at 200 °C. ► At 300 °C strong decrease of intensity of AE signal due to non-basal slip activity.
