Effect of the Processing Parameters on the Porosity and Mechanical Behavior of Titanium Samples with Bimodal Microstructure Produced via Hot Pressing
Commercially pure (c.p.) titanium grade IV with a bimodal microstructure is a promising material for biomedical implants. The influence of the processing parameters on the physical, microstructural, and mechanical properties was investigated. The bimodal microstructure was achieved from the blends o...
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| Online Access: | https://www.mdpi.com/1996-1944/15/1/136 |
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| author | Ricardo Chávez-Vásconez Sheila Lascano Sergio Sauceda Mauricio Reyes-Valenzuela Christopher Salvo Ramalinga Viswanathan Mangalaraja Francisco José Gotor Cristina Arévalo Yadir Torres |
| author_facet | Ricardo Chávez-Vásconez Sheila Lascano Sergio Sauceda Mauricio Reyes-Valenzuela Christopher Salvo Ramalinga Viswanathan Mangalaraja Francisco José Gotor Cristina Arévalo Yadir Torres |
| author_sort | Ricardo Chávez-Vásconez |
| collection | DOAJ |
| description | Commercially pure (c.p.) titanium grade IV with a bimodal microstructure is a promising material for biomedical implants. The influence of the processing parameters on the physical, microstructural, and mechanical properties was investigated. The bimodal microstructure was achieved from the blends of powder particles with different sizes, while the porous structure was obtained using the space-holder technique (50 vol.% of ammonium bicarbonate). Mechanically milled powders (10 and 20 h) were mixed in 50 wt.% or 75 wt.% with c.p. titanium. Four different mixtures of powders were precompacted via uniaxial cold pressing at 400 MPa. Then, the specimens were sintered at 750 °C via hot pressing in an argon gas atmosphere. The presence of a bimodal microstructure, comprised of small-grain regions separated by coarse-grain ones, was confirmed by optical and scanning electron microscopies. The samples with a bimodal microstructure exhibited an increase in the porosity compared with the commercially available pure Ti. In addition, the hardness was increased while the Young’s modulus was decreased in the specimens with 75 wt.% of the milled powders (20 h). |
| first_indexed | 2024-03-10T03:35:00Z |
| format | Article |
| id | doaj.art-aa6e18a0632b4830a592c90fbce8951e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:35:00Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-aa6e18a0632b4830a592c90fbce8951e2023-11-23T11:48:39ZengMDPI AGMaterials1996-19442021-12-0115113610.3390/ma15010136Effect of the Processing Parameters on the Porosity and Mechanical Behavior of Titanium Samples with Bimodal Microstructure Produced via Hot PressingRicardo Chávez-Vásconez0Sheila Lascano1Sergio Sauceda2Mauricio Reyes-Valenzuela3Christopher Salvo4Ramalinga Viswanathan Mangalaraja5Francisco José Gotor6Cristina Arévalo7Yadir Torres8Departamento de Ingeniería Mecánica, Universidad Técnica Federico Santa María, Avenida Vicuña Mackenna 3939, Santiago 8940572, ChileDepartamento de Ingeniería Mecánica, Universidad Técnica Federico Santa María, Avenida Vicuña Mackenna 3939, Santiago 8940572, ChileDepartamento de Ingeniería Mecánica, Universidad Técnica Federico Santa María, Avenida Vicuña Mackenna 3939, Santiago 8940572, ChileDepartamento de Ingeniería Mecánica, Universidad Técnica Federico Santa María, Avenida Vicuña Mackenna 3939, Santiago 8940572, ChileDepartamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad del Bío-Bío, Avda. Collao 1202, Casilla 5-C, Concepción 4081112, ChileDepartamento de Ingeniería de Materiales, Universidad de Concepción, Edmundo Larenas 270, Concepción 4070409, ChileInstituto de Ciencia de Materiales de Sevilla (CSIC-US), Américo Vespucio 49, 41092 Sevilla, SpainDepartamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Poliécnica Superior, Calle Virgen de África 7, 41011 Seville, SpainDepartamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Poliécnica Superior, Calle Virgen de África 7, 41011 Seville, SpainCommercially pure (c.p.) titanium grade IV with a bimodal microstructure is a promising material for biomedical implants. The influence of the processing parameters on the physical, microstructural, and mechanical properties was investigated. The bimodal microstructure was achieved from the blends of powder particles with different sizes, while the porous structure was obtained using the space-holder technique (50 vol.% of ammonium bicarbonate). Mechanically milled powders (10 and 20 h) were mixed in 50 wt.% or 75 wt.% with c.p. titanium. Four different mixtures of powders were precompacted via uniaxial cold pressing at 400 MPa. Then, the specimens were sintered at 750 °C via hot pressing in an argon gas atmosphere. The presence of a bimodal microstructure, comprised of small-grain regions separated by coarse-grain ones, was confirmed by optical and scanning electron microscopies. The samples with a bimodal microstructure exhibited an increase in the porosity compared with the commercially available pure Ti. In addition, the hardness was increased while the Young’s modulus was decreased in the specimens with 75 wt.% of the milled powders (20 h).https://www.mdpi.com/1996-1944/15/1/136porous titaniumbimodal microstructurehot-pressingpowder metallurgymechanical millingmechanical behavior |
| spellingShingle | Ricardo Chávez-Vásconez Sheila Lascano Sergio Sauceda Mauricio Reyes-Valenzuela Christopher Salvo Ramalinga Viswanathan Mangalaraja Francisco José Gotor Cristina Arévalo Yadir Torres Effect of the Processing Parameters on the Porosity and Mechanical Behavior of Titanium Samples with Bimodal Microstructure Produced via Hot Pressing Materials porous titanium bimodal microstructure hot-pressing powder metallurgy mechanical milling mechanical behavior |
| title | Effect of the Processing Parameters on the Porosity and Mechanical Behavior of Titanium Samples with Bimodal Microstructure Produced via Hot Pressing |
| title_full | Effect of the Processing Parameters on the Porosity and Mechanical Behavior of Titanium Samples with Bimodal Microstructure Produced via Hot Pressing |
| title_fullStr | Effect of the Processing Parameters on the Porosity and Mechanical Behavior of Titanium Samples with Bimodal Microstructure Produced via Hot Pressing |
| title_full_unstemmed | Effect of the Processing Parameters on the Porosity and Mechanical Behavior of Titanium Samples with Bimodal Microstructure Produced via Hot Pressing |
| title_short | Effect of the Processing Parameters on the Porosity and Mechanical Behavior of Titanium Samples with Bimodal Microstructure Produced via Hot Pressing |
| title_sort | effect of the processing parameters on the porosity and mechanical behavior of titanium samples with bimodal microstructure produced via hot pressing |
| topic | porous titanium bimodal microstructure hot-pressing powder metallurgy mechanical milling mechanical behavior |
| url | https://www.mdpi.com/1996-1944/15/1/136 |
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