HIGH STRAIN RATE BEHAVIOUR OF AN AZ31 + 0.5 Ca MAGNESIUM ALLOY
|
| Title | HIGH STRAIN RATE BEHAVIOUR OF AN AZ31 + 0.5 Ca MAGNESIUM ALLOY |
| Authors | |
| Abstract | The paper reports behaviour of magnesium alloy AZ31 (nominal composition 3 % Al - 1 % Zn – balance Mg) with an addition of 0.5 wt. % Ca at high strain rates. Samples were prepared by the squeeze cast technology. Dynamic compression Hopkinson tests were performed at room temperature with impact velocities ranging from 11.2 to 21.9 m.s-1. A rapid increase of the flow stress and the strain rate sensitivity was observed at high strain rates. Transmission electron microscopy showed extremely high dislocation density and mechanical twins of two types. Adiabatic shear banding is discussed as the reason for the observed behaviour at high strain rates. |
| Publisher | Faculty of Mechanical Engineering University of Zilina, Slovak Republic |
| Date | 2012-01-21 |
| Source | Materials Engineering - Materiálové inžinierstvo (MEMI) Vol 19, No 1 (2012) |
| Rights | Articles published in this Open Acess Journal are licensing using Creative Commons License. Except where otherwise noted, individual articles in the Materials Engineering - Materiálové inžinierstvo journal are licensed under a CREATIVE COMMONS ATTRIBUTION-NON COMMERCIAL-NO DERIVS 3.0 UNPORTED LICENSE (for details please visit http://creativecommons.org/licenses/by-nc-nd/3.0/ ).Copyrights for articles published in Materials Engineering - Materiálové inžinierstvo (MEMI) journal are retained by the authors, with first publication rights granted to the journal. The journal/publisher is not responsible for subsequent uses of the work.Authors are permited to self-archive the final version of their published articles into institutional repositories. Authors can use the final version of published article for the non-exclusive distribution with an acknowledgement of its previous publication in this journal.Authors are allowed to post their work to institutional repositories prior to and during the submission (evaluation) process. |