The crystal structure of GPB zones in Al-Cu-Mg alloys is very unique, consisting of agglomeration of 1D crystals. Current work identifies and fully describes a new type of 1D crystal of the GPB zone family based on high-resolution STEM observations. The observation enables to generalize the structural relationship between the possible 1D crystals. Ab-initio calculations show that the newly identified 1D-crystal has a formation energy that is comparable to the larger type, while much more favorable than FCC-based models.
Revised: May 11, 2011 |
Published: June 1, 2011
Citation
Kovarik L., and M.J. Mills. 2011.Structural Relationship Between One-Dimensional Crystals of Guinier-Preston-Bagaryatsky Zones in Al-Cu-Mg Alloys.Scripta Materialia 64, no. 11:999-1002.PNNL-SA-76716.doi:10.1016/j.scriptamat.2011.01.033