Stacking faults and the {\gamma}-surface on {1-101} pyramidal planes in {\alpha}-titanium
| Autor: | Ready, Adam J., Sutton, Adrian P., Haynes, Peter D., Rugg, David |
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| Rok vydání: | 2016 |
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| Druh dokumentu: | Working Paper |
| Popis: | Using first principles methods we calculated the entire {\gamma}-surface of the first order pyramidal planes in {\alpha}-titanium. Slip on these planes involving dislocations with c + a dislocations is one means by which {\alpha}-titanium polycrystals may supplement slip on prism planes with a-type Burgers vectors to maintain ductility. We find two stable intrinsic stacking faults with relatively small energies. We show that dissociation of c + a dislocations into two dislocations with Burgers vectors (c + a)/2 is not possible in {\alpha}-titanium because there is no stable stacking fault at (c + a)/2. Instead we propose a possible dissociation of a c + a dislocation into three partial dislocations separated by the two intrinsic faults we have identified. Comment: This paper has been withdrawn due to a computational error in generating the first-order pyramidal gamma surface. 9 pages, 10 figures |
| Databáze: | arXiv |
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