Variations in grain boundary segregation for nanocrystalline stability and strength
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2012.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2013
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| Online Access: | http://hdl.handle.net/1721.1/76179 |
| _version_ | 1826205106829262848 |
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| author | Figueroa, Oscar, III |
| author2 | Christopher Schuh. |
| author_facet | Christopher Schuh. Figueroa, Oscar, III |
| author_sort | Figueroa, Oscar, III |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2012. |
| first_indexed | 2024-09-23T13:07:08Z |
| format | Thesis |
| id | mit-1721.1/76179 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T13:07:08Z |
| publishDate | 2013 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/761792019-04-10T22:30:07Z Variations in grain boundary segregation for nanocrystalline stability and strength Figueroa, Oscar, III Christopher Schuh. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Materials Science and Engineering. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2012. Cataloged from PDF version of thesis. Includes bibliographical references (p. 39). In the last few decades, nanocrystalline metals have been of increasing interest. Their ability to show increased yield strength and uniform structure show them to be potentially useful in many applications. Additionally, nanocrystalline metals have become more easily manufactured in recent years, allowing for more testing and more use within industrial settings. However, nanocrystalline metals are still highly unstable, mainly due to temperature related growth. Grain boundary segregation is one way in which materials can keep nano length-scale grains. This process involves metal alloys that preferentially segregate the alloying material to the grain boundaries, potentially leading to Grain Boundary Embrittlement (GBE). Using an ideal work of fracture equation, [gamma] = 2[sigma]s - [sigma]g, the energy required to fracture nanocrystalline metal alloys was obtained, and predicted grain stability. Fracture toughness data is also calculated and compared. A contrast between bulk and nanocrystalline alloys is then made, showing benefits to the use of either set of materials for specific alloy functions. by Oscar Figueroa, III. S.B. 2013-01-07T21:34:49Z 2013-01-07T21:34:49Z 2012 2012 Thesis http://hdl.handle.net/1721.1/76179 821070517 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 39 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Materials Science and Engineering. Figueroa, Oscar, III Variations in grain boundary segregation for nanocrystalline stability and strength |
| title | Variations in grain boundary segregation for nanocrystalline stability and strength |
| title_full | Variations in grain boundary segregation for nanocrystalline stability and strength |
| title_fullStr | Variations in grain boundary segregation for nanocrystalline stability and strength |
| title_full_unstemmed | Variations in grain boundary segregation for nanocrystalline stability and strength |
| title_short | Variations in grain boundary segregation for nanocrystalline stability and strength |
| title_sort | variations in grain boundary segregation for nanocrystalline stability and strength |
| topic | Materials Science and Engineering. |
| url | http://hdl.handle.net/1721.1/76179 |
| work_keys_str_mv | AT figueroaoscariii variationsingrainboundarysegregationfornanocrystallinestabilityandstrength |