Exploration of Nano-scale Structural Instabilities in Metastable β Titanium Alloys Using Advanced Electron Microscopy
A variety of nano-scale structural instabilities formed in different metastable β titanium alloys have been systematically investigated using advanced characterization techniques. The characteristics of three different types of nano-scale structural instabilities, the transformation mechanisms and p...
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| Format: | Article |
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EDP Sciences
2020-01-01
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| Series: | MATEC Web of Conferences |
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| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_12001.pdf |
| _version_ | 1819127335385825280 |
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| author | Zheng Yufeng Wang Dong Banerjee Rajarshi Banerjee Dipankar Wang Yunzhi Fraser Hamish L. |
| author_facet | Zheng Yufeng Wang Dong Banerjee Rajarshi Banerjee Dipankar Wang Yunzhi Fraser Hamish L. |
| author_sort | Zheng Yufeng |
| collection | DOAJ |
| description | A variety of nano-scale structural instabilities formed in different metastable β titanium alloys have been systematically investigated using advanced characterization techniques. The characteristics of three different types of nano-scale structural instabilities, the transformation mechanisms and pathways involved and the critical experimental conditions to generate such nano-scale phases will be reviewed and summarized, including athermal ω phase with hexagonal structure, O’ phase with orthorhombic structure, and incommensurate modulated nanodomains. The athermal ω phase has been observed in the as-quenched state in Ti-xMo (x=12, 15 and 181), Ti-18Mo-5Al, Ti-20V, Ti-5Fe, Ti-5Al-5Mo-5V-3Cr (Ti-5553) and Ti-24Nb-4Zr-8Sn (Ti-2448). O’ phase has been characterized to co-exist with athermal ω phase in the as-quenched state isomorphous titanium alloys, including Ti-26Zr-2Al (at.%), Ti-18Mo, Ti-18Mo-5Al, Ti-5553 and Ti-2448. Incommensurate modulated nanodomains were found in compositionally graded Ti-xFe alloy when the athermal ω phase is suppressed. These various nano-scale structural instabilities need to be taken into consideration when designing novel metastable β titanium alloys to optimize the mechanical performance by microstructure engineering. |
| first_indexed | 2024-12-22T08:10:18Z |
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| id | doaj.art-7656465c38254f2d9c429a263085da29 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-22T08:10:18Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-7656465c38254f2d9c429a263085da292022-12-21T18:33:03ZengEDP SciencesMATEC Web of Conferences2261-236X2020-01-013211200110.1051/matecconf/202032112001matecconf_ti2019_12001Exploration of Nano-scale Structural Instabilities in Metastable β Titanium Alloys Using Advanced Electron MicroscopyZheng YufengWang Dong0Banerjee Rajarshi1Banerjee Dipankar2Wang Yunzhi3Fraser Hamish L.4Center of Microstructure Science, Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong UniversityMaterials Research Facility and Department of Materials Science and Engineering, University of North TexasDepartment of Materials Engineering, Indian Institute of ScienceCenter for the Accelerated Maturation of Materials (CAMM) and Department of Materials Science and Engineering, The Ohio State UniversityCenter for the Accelerated Maturation of Materials (CAMM) and Department of Materials Science and Engineering, The Ohio State UniversityA variety of nano-scale structural instabilities formed in different metastable β titanium alloys have been systematically investigated using advanced characterization techniques. The characteristics of three different types of nano-scale structural instabilities, the transformation mechanisms and pathways involved and the critical experimental conditions to generate such nano-scale phases will be reviewed and summarized, including athermal ω phase with hexagonal structure, O’ phase with orthorhombic structure, and incommensurate modulated nanodomains. The athermal ω phase has been observed in the as-quenched state in Ti-xMo (x=12, 15 and 181), Ti-18Mo-5Al, Ti-20V, Ti-5Fe, Ti-5Al-5Mo-5V-3Cr (Ti-5553) and Ti-24Nb-4Zr-8Sn (Ti-2448). O’ phase has been characterized to co-exist with athermal ω phase in the as-quenched state isomorphous titanium alloys, including Ti-26Zr-2Al (at.%), Ti-18Mo, Ti-18Mo-5Al, Ti-5553 and Ti-2448. Incommensurate modulated nanodomains were found in compositionally graded Ti-xFe alloy when the athermal ω phase is suppressed. These various nano-scale structural instabilities need to be taken into consideration when designing novel metastable β titanium alloys to optimize the mechanical performance by microstructure engineering.https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_12001.pdfmicrostructure evolutionmetastable β titanium alloysω phase; o’ phaseincommensurate modulated domains |
| spellingShingle | Zheng Yufeng Wang Dong Banerjee Rajarshi Banerjee Dipankar Wang Yunzhi Fraser Hamish L. Exploration of Nano-scale Structural Instabilities in Metastable β Titanium Alloys Using Advanced Electron Microscopy MATEC Web of Conferences microstructure evolution metastable β titanium alloys ω phase; o’ phase incommensurate modulated domains |
| title | Exploration of Nano-scale Structural Instabilities in Metastable β Titanium Alloys Using Advanced Electron Microscopy |
| title_full | Exploration of Nano-scale Structural Instabilities in Metastable β Titanium Alloys Using Advanced Electron Microscopy |
| title_fullStr | Exploration of Nano-scale Structural Instabilities in Metastable β Titanium Alloys Using Advanced Electron Microscopy |
| title_full_unstemmed | Exploration of Nano-scale Structural Instabilities in Metastable β Titanium Alloys Using Advanced Electron Microscopy |
| title_short | Exploration of Nano-scale Structural Instabilities in Metastable β Titanium Alloys Using Advanced Electron Microscopy |
| title_sort | exploration of nano scale structural instabilities in metastable β titanium alloys using advanced electron microscopy |
| topic | microstructure evolution metastable β titanium alloys ω phase; o’ phase incommensurate modulated domains |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_12001.pdf |
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