Skip to main content

An investigation by EXAFS of local atomic structure in an Mg-Nd alloy after processing by high-pressure torsion and ageing.

Bourezg, Y.I., Azzeddine, H., Harfouche, M., Thiaudiere, D., Mocuta, C., Huang, Y., Bradai, D. and Langdon, T., 2020. An investigation by EXAFS of local atomic structure in an Mg-Nd alloy after processing by high-pressure torsion and ageing. Materials Letters, 264 (April), 127379.

Full text available as:

[img] PDF
Bourezg et al_revised.pdf - Accepted Version
Restricted to Repository staff only until 20 January 2021.
Available under License Creative Commons Attribution Non-commercial No Derivatives.

941kB

Abstract

The local atomic structure of an Mg-1.44Nd (wt.%) alloy was investigated after solution annealing, high-pressure torsion (HPT) processing up to 1 and 10 turns and ageing at 250 °C for 5 h using X-ray absorption fine structure (XAFS) measurements at the Nd LIII-edge. The results show that HPT processing has no effect on the atomic structure around Nd atoms compared to the unprocessed state, whereas ageing at 250 °C for 5 h induces a significant modification in the coordination number and interatomic distances around the Nd atoms. These variations are analyzed based on the correlations between precipitation, defects and atomic mobility of the chemical species.

Item Type:Article
ISSN:0167-577X
Uncontrolled Keywords:ageing; EXAFS; high-pressure torsion; Mg-Nd alloy; phase transformation; metals and alloys
Group:Faculty of Science & Technology
ID Code:33261
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:20 Jan 2020 10:39
Last Modified:10 Feb 2020 16:38

Downloads

Downloads per month over past year

More statistics for this item...
Repository Staff Only -