1. Mechanical and Manufacturing Department; Mondragon Unibertsitatea; Loramendi 4 Arrasate-Mondragón 20500 Spain
2. Department of Materials Science and Engineering; University of Sheffield; Sir Robert Hadfield Building Mappin Street Sheffield S1 3JD UK
3. Magnesium Innovation Centre; Helmholtz-Zentrum Geesthacht; Max-Planck-Strasse 1 D-21502 Geesthacht Germany