Thermomechanical Processing of Cost-Affordable Powder Metallurgy Ti-5Fe Alloys from the Blended Elemental Approach: Microstructure, Tensile Deformation Behavior, and Failure
The development of cost-affordable Ti alloys is key for the application of Ti in other industries like the automobile sector. Therefore, a combination of powder metallurgy (PM) and low-cost compositions is an interesting approach. In this article, a cost-affordable PM Ti-5Fe alloy is processed follo...
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MDPI AG
2020-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/11/1405 |
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| author | Carlos Romero Fei Yang Shanghai Wei Leandro Bolzoni |
| author_facet | Carlos Romero Fei Yang Shanghai Wei Leandro Bolzoni |
| author_sort | Carlos Romero |
| collection | DOAJ |
| description | The development of cost-affordable Ti alloys is key for the application of Ti in other industries like the automobile sector. Therefore, a combination of powder metallurgy (PM) and low-cost compositions is an interesting approach. In this article, a cost-affordable PM Ti-5Fe alloy is processed following the blended elemental route and extruded at high temperature to remove porosity. Different extrusion temperatures and heat treatments (i.e., solution treatment and aging, STA) are performed to obtain ultrafine microstructures, and their effect on the mechanical behavior is studied. For extrusions in the β phase, microstructures consist of coarse lamellar colonies, resulting in alloys with improved properties compared to the as-sintered alloy but still lacking toughness due to the failure happening just after necking onset. Extruding in the α + β phase results in a bimodal microstructure of fine elongated primary α and coarse lamellar colonies, and the alloy becomes tougher. STA with aging below the eutectoid temperature of 590 °C leads to a hard but brittle alloy, whereas STA with aging above it results in alloys with strength comparable to the as-extruded conditions and enhanced ductility. |
| first_indexed | 2024-03-10T15:24:25Z |
| format | Article |
| id | doaj.art-34242513db104f448df16a7e4aad9dd3 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T15:24:25Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-34242513db104f448df16a7e4aad9dd32023-11-20T18:09:57ZengMDPI AGMetals2075-47012020-10-011011140510.3390/met10111405Thermomechanical Processing of Cost-Affordable Powder Metallurgy Ti-5Fe Alloys from the Blended Elemental Approach: Microstructure, Tensile Deformation Behavior, and FailureCarlos Romero0Fei Yang1Shanghai Wei2Leandro Bolzoni3Waikato Centre for Advanced Materials and Manufacturing, School of Engineering, The University of Waikato, Private Bag 3105, Hamilton 3240, New ZealandWaikato Centre for Advanced Materials and Manufacturing, School of Engineering, The University of Waikato, Private Bag 3105, Hamilton 3240, New ZealandDepartment of Chemical & Materials Engineering, University of Auckland, Auckland 1142, New ZealandWaikato Centre for Advanced Materials and Manufacturing, School of Engineering, The University of Waikato, Private Bag 3105, Hamilton 3240, New ZealandThe development of cost-affordable Ti alloys is key for the application of Ti in other industries like the automobile sector. Therefore, a combination of powder metallurgy (PM) and low-cost compositions is an interesting approach. In this article, a cost-affordable PM Ti-5Fe alloy is processed following the blended elemental route and extruded at high temperature to remove porosity. Different extrusion temperatures and heat treatments (i.e., solution treatment and aging, STA) are performed to obtain ultrafine microstructures, and their effect on the mechanical behavior is studied. For extrusions in the β phase, microstructures consist of coarse lamellar colonies, resulting in alloys with improved properties compared to the as-sintered alloy but still lacking toughness due to the failure happening just after necking onset. Extruding in the α + β phase results in a bimodal microstructure of fine elongated primary α and coarse lamellar colonies, and the alloy becomes tougher. STA with aging below the eutectoid temperature of 590 °C leads to a hard but brittle alloy, whereas STA with aging above it results in alloys with strength comparable to the as-extruded conditions and enhanced ductility.https://www.mdpi.com/2075-4701/10/11/1405titanium alloyspowder metallurgythermomechanical processingmechanical properties |
| spellingShingle | Carlos Romero Fei Yang Shanghai Wei Leandro Bolzoni Thermomechanical Processing of Cost-Affordable Powder Metallurgy Ti-5Fe Alloys from the Blended Elemental Approach: Microstructure, Tensile Deformation Behavior, and Failure Metals titanium alloys powder metallurgy thermomechanical processing mechanical properties |
| title | Thermomechanical Processing of Cost-Affordable Powder Metallurgy Ti-5Fe Alloys from the Blended Elemental Approach: Microstructure, Tensile Deformation Behavior, and Failure |
| title_full | Thermomechanical Processing of Cost-Affordable Powder Metallurgy Ti-5Fe Alloys from the Blended Elemental Approach: Microstructure, Tensile Deformation Behavior, and Failure |
| title_fullStr | Thermomechanical Processing of Cost-Affordable Powder Metallurgy Ti-5Fe Alloys from the Blended Elemental Approach: Microstructure, Tensile Deformation Behavior, and Failure |
| title_full_unstemmed | Thermomechanical Processing of Cost-Affordable Powder Metallurgy Ti-5Fe Alloys from the Blended Elemental Approach: Microstructure, Tensile Deformation Behavior, and Failure |
| title_short | Thermomechanical Processing of Cost-Affordable Powder Metallurgy Ti-5Fe Alloys from the Blended Elemental Approach: Microstructure, Tensile Deformation Behavior, and Failure |
| title_sort | thermomechanical processing of cost affordable powder metallurgy ti 5fe alloys from the blended elemental approach microstructure tensile deformation behavior and failure |
| topic | titanium alloys powder metallurgy thermomechanical processing mechanical properties |
| url | https://www.mdpi.com/2075-4701/10/11/1405 |
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