| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1609786 | Journal of Alloys and Compounds | 2015 | 20 Pages |
Abstract
The formation mechanism of the plate-like strengthening T1-phase in an Al-4.15Cu-1.15Li (wt.%) alloy has been revealed by means of advanced imaging techniques and the first-principle calculations. It is shown that T1-precipitates nucleate directly from their own GPT1 zones and grow thicker in two possible paths. One is regular by repeating T1-cells, and the other is abnormal via T1-variants. Structural model of GPT1 zones has been suggested, and refined by image simulation. A possible structural evolution from GPT1 zones to precipitate T1 at atomic level is suggested and proved to be energetically reasonable.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Z. Gao, J.Z. Liu, J.H. Chen, S.Y. Duan, Z.R. Liu, W.Q. Ming, C.L. Wu,