Mg-Ni-Nb<sub>2</sub>O<sub>5</sub> Composite Produced by High-Pressure Torsion
A Mg-based composite material has been produced by the consolidation at room temperature of a Mg-5wt.% Ni-2wt.% Nb<sub>2</sub>O<sub>5</sub> powder mixture subjected to high-pressure torsion (HPT), one of the processing methods to induce severe plastic deformations. The micros...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/12/10/1684 |
| _version_ | 1797471369911336960 |
|---|---|
| author | Martin Fibela-Esparza Armando Salinas-Rodriguez Juan Méndez-Nonell José Martin Herrera-Ramirez Yoshikazu Todaka José Gerardo Cabañas-Moreno |
| author_facet | Martin Fibela-Esparza Armando Salinas-Rodriguez Juan Méndez-Nonell José Martin Herrera-Ramirez Yoshikazu Todaka José Gerardo Cabañas-Moreno |
| author_sort | Martin Fibela-Esparza |
| collection | DOAJ |
| description | A Mg-based composite material has been produced by the consolidation at room temperature of a Mg-5wt.% Ni-2wt.% Nb<sub>2</sub>O<sub>5</sub> powder mixture subjected to high-pressure torsion (HPT), one of the processing methods to induce severe plastic deformations. The microstructure, density, and microhardness of the consolidated disks were characterized after the application of up to 30 revolutions in torsion under compression stresses of 3 and 5 GPa. According to the density measurements, the composite was consolidated in full after the application of five revolutions, although disks subjected to only one revolution exhibited densities close to the maximum measured value. On the other hand, grain size and microhardness measurements showed that differences existed at locations near the center and the periphery of the HPT-processed disks. Under the stress of 5 GPa, the grain size in the central regions stabilized at about 0.35 μm after five revolutions, while at the peripherical regions it gradually decreased with an increasing number of revolutions down to about 0.15 μm after 30 revolutions. In turn, the microhardness measured along a diametral cross section steadily increased with the number of revolutions between 1 and 10 revolutions, maintaining a gradient from the center to the periphery in all cases. With the application of 20 and 30 revolutions, only the peripheral regions increased considerably in hardness. It was discovered that the magnesium particles in the initial powder mixture had formed an oxide—hydroxide surface layer, which changed the expected final density of the consolidated material by about 2 to 4.5%. This superficial contamination of the Mg powders did not prevent the material from achieving full consolidation. |
| first_indexed | 2024-03-09T19:48:31Z |
| format | Article |
| id | doaj.art-9f5c9a750d56431bba0f6b0a2368619d |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T19:48:31Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-9f5c9a750d56431bba0f6b0a2368619d2023-11-24T01:19:04ZengMDPI AGMetals2075-47012022-10-011210168410.3390/met12101684Mg-Ni-Nb<sub>2</sub>O<sub>5</sub> Composite Produced by High-Pressure TorsionMartin Fibela-Esparza0Armando Salinas-Rodriguez1Juan Méndez-Nonell2José Martin Herrera-Ramirez3Yoshikazu Todaka4José Gerardo Cabañas-Moreno5Centro de Investigación y de Estudios Avanzados del IPN, CINVESTAV Unidad Saltillo, Ramos Arizpe 25900, MexicoCentro de Investigación y de Estudios Avanzados del IPN, CINVESTAV Unidad Saltillo, Ramos Arizpe 25900, MexicoCentro de Investigación y de Estudios Avanzados del IPN, CINVESTAV Unidad Saltillo, Ramos Arizpe 25900, MexicoCentro de Investigación en Materiales Avanzados–CIMAV, Miguel de Cervantes 120, Chihuahua 31136, MexicoDepartment of Mechanical Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Aichi, JapanPrograma de Doctorado en Nanociencias y Nanotecnología, CINVESTAV, Av. Instituto Politécnico Nacional 2508, Cd. de México 07360, MexicoA Mg-based composite material has been produced by the consolidation at room temperature of a Mg-5wt.% Ni-2wt.% Nb<sub>2</sub>O<sub>5</sub> powder mixture subjected to high-pressure torsion (HPT), one of the processing methods to induce severe plastic deformations. The microstructure, density, and microhardness of the consolidated disks were characterized after the application of up to 30 revolutions in torsion under compression stresses of 3 and 5 GPa. According to the density measurements, the composite was consolidated in full after the application of five revolutions, although disks subjected to only one revolution exhibited densities close to the maximum measured value. On the other hand, grain size and microhardness measurements showed that differences existed at locations near the center and the periphery of the HPT-processed disks. Under the stress of 5 GPa, the grain size in the central regions stabilized at about 0.35 μm after five revolutions, while at the peripherical regions it gradually decreased with an increasing number of revolutions down to about 0.15 μm after 30 revolutions. In turn, the microhardness measured along a diametral cross section steadily increased with the number of revolutions between 1 and 10 revolutions, maintaining a gradient from the center to the periphery in all cases. With the application of 20 and 30 revolutions, only the peripheral regions increased considerably in hardness. It was discovered that the magnesium particles in the initial powder mixture had formed an oxide—hydroxide surface layer, which changed the expected final density of the consolidated material by about 2 to 4.5%. This superficial contamination of the Mg powders did not prevent the material from achieving full consolidation.https://www.mdpi.com/2075-4701/12/10/1684severe plastic deformation (SPD)high pressure torsion (HPT)magnesium alloysultrafine grain materials |
| spellingShingle | Martin Fibela-Esparza Armando Salinas-Rodriguez Juan Méndez-Nonell José Martin Herrera-Ramirez Yoshikazu Todaka José Gerardo Cabañas-Moreno Mg-Ni-Nb<sub>2</sub>O<sub>5</sub> Composite Produced by High-Pressure Torsion Metals severe plastic deformation (SPD) high pressure torsion (HPT) magnesium alloys ultrafine grain materials |
| title | Mg-Ni-Nb<sub>2</sub>O<sub>5</sub> Composite Produced by High-Pressure Torsion |
| title_full | Mg-Ni-Nb<sub>2</sub>O<sub>5</sub> Composite Produced by High-Pressure Torsion |
| title_fullStr | Mg-Ni-Nb<sub>2</sub>O<sub>5</sub> Composite Produced by High-Pressure Torsion |
| title_full_unstemmed | Mg-Ni-Nb<sub>2</sub>O<sub>5</sub> Composite Produced by High-Pressure Torsion |
| title_short | Mg-Ni-Nb<sub>2</sub>O<sub>5</sub> Composite Produced by High-Pressure Torsion |
| title_sort | mg ni nb sub 2 sub o sub 5 sub composite produced by high pressure torsion |
| topic | severe plastic deformation (SPD) high pressure torsion (HPT) magnesium alloys ultrafine grain materials |
| url | https://www.mdpi.com/2075-4701/12/10/1684 |
| work_keys_str_mv | AT martinfibelaesparza mgninbsub2subosub5subcompositeproducedbyhighpressuretorsion AT armandosalinasrodriguez mgninbsub2subosub5subcompositeproducedbyhighpressuretorsion AT juanmendeznonell mgninbsub2subosub5subcompositeproducedbyhighpressuretorsion AT josemartinherreraramirez mgninbsub2subosub5subcompositeproducedbyhighpressuretorsion AT yoshikazutodaka mgninbsub2subosub5subcompositeproducedbyhighpressuretorsion AT josegerardocabanasmoreno mgninbsub2subosub5subcompositeproducedbyhighpressuretorsion |