| Titre : | Unexpected influence of Mn addition on the creep properties of a cast Mg–2Al–2Ca (mass%) alloy (2012) |
| Auteurs : | T. Homma, Auteur ; S. Nakawaki, Auteur ; K. Oh-ishi, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 59 N° 20, Décembre 2011) |
| Article en page(s) : | pp. 7662–7672 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Tags : | Magnesium alloy Creep Guinier–Preston zone Transmission electron microscopy Atom probe |
| Résumé : | The addition of 0.3% Mn to a Mg–2Al–2Ca (mass%) alloy improves the minimum creep rate by one order of magnitude compared with the Mn-free alloy. Network-shaped Mg2Ca (C14 structure) and (Mg,Al)2Ca (C36 structure) compounds coexist in the interdendritic regions, while plate-shaped Al2Ca (C15 structure) phases are dispersed in the matrix. Ordered Guinier–Preston (GP) zones form dynamically on the basal plane of the α-Mg matrix during creep deformation. The number density of the fine GP zones in the Mn-containing alloy was found to be higher than that in the Mn-free alloy. |
| ISSN : | 1359-6454 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S1359645411006264 |
