Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures
The potential for β grain boundaries (GBs) to give rise to large Widmanstätten colonies was determined through the observation of a large amount of precipitates at β GBs in a β-metastable titanium alloy using electron backscatter imaging and diffraction. The most critical boundaries are those which...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_12040.pdf |
| _version_ | 1818909899149541376 |
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| author | Liu Tao Germain Lionel Teixeira Julien Aeby-Gautier Elisabeth Gey Nathalie |
| author_facet | Liu Tao Germain Lionel Teixeira Julien Aeby-Gautier Elisabeth Gey Nathalie |
| author_sort | Liu Tao |
| collection | DOAJ |
| description | The potential for β grain boundaries (GBs) to give rise to large Widmanstätten colonies was determined through the observation of a large amount of precipitates at β GBs in a β-metastable titanium alloy using electron backscatter imaging and diffraction. The most critical boundaries are those which transform early and where a type of Variant Selection (VS) called double Burgers VS occurs. This mechanisms take place at ‘special’ β boundaries misoriented so that an α precipitate can be related to both grains through the Burgers relation. It was shown that the most critical GBs have a disorientation at an angle of less than 10° from 49.5°/<110> or 60°/<110>. A simulation study allowed those boundaries to be quantifed in crystallographic textures typical of industrial products. Those texture have then been discussed as a function of their potential to form large Widmanstätten colonies. |
| first_indexed | 2024-12-19T22:34:14Z |
| format | Article |
| id | doaj.art-6bed2b00796a44e1921c220381e67c0f |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-19T22:34:14Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-6bed2b00796a44e1921c220381e67c0f2022-12-21T20:03:16ZengEDP SciencesMATEC Web of Conferences2261-236X2020-01-013211204010.1051/matecconf/202032112040matecconf_ti2019_12040Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructuresLiu TaoGermain LionelTeixeira JulienAeby-Gautier ElisabethGey NathalieThe potential for β grain boundaries (GBs) to give rise to large Widmanstätten colonies was determined through the observation of a large amount of precipitates at β GBs in a β-metastable titanium alloy using electron backscatter imaging and diffraction. The most critical boundaries are those which transform early and where a type of Variant Selection (VS) called double Burgers VS occurs. This mechanisms take place at ‘special’ β boundaries misoriented so that an α precipitate can be related to both grains through the Burgers relation. It was shown that the most critical GBs have a disorientation at an angle of less than 10° from 49.5°/<110> or 60°/<110>. A simulation study allowed those boundaries to be quantifed in crystallographic textures typical of industrial products. Those texture have then been discussed as a function of their potential to form large Widmanstätten colonies.https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_12040.pdf |
| spellingShingle | Liu Tao Germain Lionel Teixeira Julien Aeby-Gautier Elisabeth Gey Nathalie Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures MATEC Web of Conferences |
| title | Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures |
| title_full | Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures |
| title_fullStr | Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures |
| title_full_unstemmed | Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures |
| title_short | Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures |
| title_sort | criteria for fast and selective α precipitation at β grain boundaries in ti alloys consequence for in service microstructures |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_12040.pdf |
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