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

Authors: Bourezg, Y.I., Azzeddine, H., Harfouche, M., Thiaudiere, D., Mocuta, C., Huang, Y., Bradai, D., Langdon, T.G.

Journal: Materials Letters

Publication Date: 01/04/2020

Volume: 264

eISSN: 1873-4979

ISSN: 0167-577X

DOI: 10.1016/j.matlet.2020.127379

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.

https://eprints.bournemouth.ac.uk/33261/

Source: Scopus

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

Authors: Bourezg, Y.I., Azzeddine, H., Harfouche, M., Thiaudiere, D., Mocuta, C., Huang, Y., Bradai, D., Langdon, T.G.

Journal: MATERIALS LETTERS

Publication Date: 01/04/2020

Volume: 264

eISSN: 1873-4979

ISSN: 0167-577X

DOI: 10.1016/j.matlet.2020.127379

https://eprints.bournemouth.ac.uk/33261/

Source: Web of Science

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

Authors: Bourezg, Y.I., Azzeddine, H., Harfouche, M., Thiaudiere, D., Mocuta, C., Huang, Y., Bradai, D., Langdon, T.G.

Journal: Materials letters

Publication Date: 01/04/2020

Volume: 264

Pages: 127379(1)-127379(4)

Publisher: Elsevier

ISSN: 0167-577X

DOI: 10.1016/j.matlet.2020.127379

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.

https://eprints.bournemouth.ac.uk/33261/

Source: Manual

Preferred by: Yi Huang