| Titre : | Plastic deformation of single crystals of Ti5Si3 with the hexagonal D88 structure |
| 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 |
| Index. décimale : | 669 (Métallurgie) |
| 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}1/3left angle bracketView the MathML sourceright-pointing angle bracket pyramidal slip and {View the MathML source}left angle bracketView the MathML sourceright-pointing angle bracket 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}1/3left angle bracketView the MathML sourceright-pointing angle bracket pyramidal slip, but are comparable to those for {View the MathML source}left angle bracketView the MathML sourceright-pointing angle bracket 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?_ob=PublicationURL&_tockey=%23TOC%235556%232010%23999419996%231577807%23FLA%23&_cdi=5556&_pubType=J&_auth=y&_acct=C000070790&_version=1&_urlVersion=0&_userid=6909337&md5=952181ad53b74a31dd165bcbdf644bd7 |
