Plastic deformation of single crystals of Ti5Si3 with the hexagonal D88 structure

• Kishida, Kyosuke

• Fujiwara, Masakazu

• Adachi, Hiroki

• Tanaka, Katsushi

• Inui, Haruyuki

Abstract

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: {1¯100}[0001] prismatic slip, {2¯1¯12}1/3<2¯1¯1¯3> pyramidal slip and {2¯1¯18}<8¯4¯4¯3> 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 (CRSS) decrease steeply with increasing temperature for all deformation modes. The values of the CRSS for {1¯100}[0001] prismatic slip are considerably lower than those for {2¯1¯12}1/3<2¯1¯1¯3> pyramidal slip, but are comparable to those for {2¯1¯18}<8¯4¯4¯3> twinning. The favored deformation modes are discussed on the basis of anisotropic elasticity theory of dislocations.

Journal

• Acta Materialia

  Acta Materialia 58 (3), 846-857, 2010-02

  Elsevier

Keywords

• Deformation behavior
• Dislocation structures
• Mechanical properties
• Transition-metal silicides
• Twinning

Details

• CRID: 1050282677040616064
• NII Article ID: 120001948916
• ISSN: 13596454
• HANDLE: 2433/102267
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles