| Titre : | Plastic deformation of single crystals of Ti5Si3 with the hexagonal D88 structure (2011) |
| Auteurs : | Kyosuke Kishida, Auteur ; Masakazu Fujiwara, Auteur ; Hiroki Adachi, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 58 N° 3, Fevrier 2010) |
| Article en page(s) : | pp. 846–857 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Tags : | Transition-metal silicides Deformation behavior Dislocation structures Twinning Mechanical properties |
| Résumé : | The deformation behavior of Ti5Si3 single crystals with the hexagonal D88 structure has been investigated in compression as a function of crystal orientation in a temperature range from 1200 to 1500 °C. Three different types of deformation modes – {View the MathML source}[0 0 0 1] prismatic slip, {View the MathML source}1/3〈View the MathML source〉 pyramidal slip and {View the MathML source}〈View the MathML source〉 twinning – were identified for the first time as being operative in Ti5Si3 at temperatures above 1300 °C, depending on the loading axis orientation. The critical resolved shear stresses (CRSSs) decrease steeply with increasing temperature for all deformation modes. The values of the CRSSs for {View the MathML source}[0 0 0 1] prismatic slip are considerably lower than those for {View the MathML source}1/3〈View the MathML source〉 pyramidal slip, but are comparable to those for {View the MathML source}〈View the MathML source〉 twinning. The favored deformation modes are discussed on the basis of anisotropic elasticity theory of dislocations. |
| DEWEY : | 669 |
| ISSN : | 1359-6454 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S1359645409006685 |
