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Texture and microhardness of Mg-Rare Earth (Nd and Ce) alloys processed by high-pressure torsion

Texture and microhardness of Mg-Rare Earth (Nd and Ce) alloys processed by high-pressure torsion
Texture and microhardness of Mg-Rare Earth (Nd and Ce) alloys processed by high-pressure torsion
The influence of high-pressure torsion (HPT) processing on the texture and microhardness of two binary Mg-RE (RE=Nd and Ce) alloys was investigated using X-ray diffraction and Vickers microhardness measurements. Disks cut from the alloys were processed by HPT at room temperature for up to 10 turns. The precipitation products of both alloys were identified using synchrotron radiation. The results show that both alloys exhibit a weak basal texture where the c-axis of most grains is shifted 15° from the shear direction. An Mg-1.44Ce (wt. %) alloy showed a continuous decrease in the texture strength which may be due to the effect of second precipitation phases (Mg17Ce2 and MgCe2). The microhardness of both alloys increased significantly with increasing HPT turns but levelled-off beyond about one HPT turn. Maximum values of ~65 and ~96 Hv were achieved which are significantly higher than the hardness of the undeformed Mg-Ce and Mg-Nd alloys.
0921-5093
477-485
Bourezg, Yousf Islem
aab04bbc-d0f1-4ef4-8bef-2471dbbca4f0
Azzeddine, Hiba
9d0bbd8e-680c-48d1-b27a-fbdd23cd2228
Baudin, Thierry
448e215d-c156-4c0a-9a3a-04078a7174b8
Helbert, Anne-Laure
01ac4ac4-73d6-4649-9bf5-4be30f1e6df2
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Bradai, Djamel
554ec639-52df-4169-8044-53485b61c829
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Bourezg, Yousf Islem
aab04bbc-d0f1-4ef4-8bef-2471dbbca4f0
Azzeddine, Hiba
9d0bbd8e-680c-48d1-b27a-fbdd23cd2228
Baudin, Thierry
448e215d-c156-4c0a-9a3a-04078a7174b8
Helbert, Anne-Laure
01ac4ac4-73d6-4649-9bf5-4be30f1e6df2
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Bradai, Djamel
554ec639-52df-4169-8044-53485b61c829
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Bourezg, Yousf Islem, Azzeddine, Hiba, Baudin, Thierry, Helbert, Anne-Laure, Huang, Yi, Bradai, Djamel and Langdon, Terence G. (2018) Texture and microhardness of Mg-Rare Earth (Nd and Ce) alloys processed by high-pressure torsion. Materials Science and Engineering: A, 724, 477-485. (doi:10.1016/j.msea.2018.03.114).

Record type: Article

Abstract

The influence of high-pressure torsion (HPT) processing on the texture and microhardness of two binary Mg-RE (RE=Nd and Ce) alloys was investigated using X-ray diffraction and Vickers microhardness measurements. Disks cut from the alloys were processed by HPT at room temperature for up to 10 turns. The precipitation products of both alloys were identified using synchrotron radiation. The results show that both alloys exhibit a weak basal texture where the c-axis of most grains is shifted 15° from the shear direction. An Mg-1.44Ce (wt. %) alloy showed a continuous decrease in the texture strength which may be due to the effect of second precipitation phases (Mg17Ce2 and MgCe2). The microhardness of both alloys increased significantly with increasing HPT turns but levelled-off beyond about one HPT turn. Maximum values of ~65 and ~96 Hv were achieved which are significantly higher than the hardness of the undeformed Mg-Ce and Mg-Nd alloys.

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Hiba-MSE2018 acepted manuscript - Accepted Manuscript
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More information

Accepted/In Press date: 28 March 2018
e-pub ahead of print date: 29 March 2018
Published date: 2 May 2018

Identifiers

Local EPrints ID: 419155
URI: http://eprints.soton.ac.uk/id/eprint/419155
ISSN: 0921-5093
PURE UUID: 02e37bd8-f028-4b29-b97c-306c1b8e6b4d
ORCID for Yi Huang: ORCID iD orcid.org/0000-0001-9259-8123
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 06 Apr 2018 16:30
Last modified: 17 Dec 2019 05:31

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