Abstract
Deformation behaviors of [110] and [112] oriented Sn single crystals were investigated under different temperatures and strain rates. It is shown that there are some differences between [110] and [112] orientations. [110] oriented sample has the higher strain rate sensitivity exponent m≈0.133, strain hardening exponent n≈0.54, activation energy Q≈35 kJ/mol and deforms through multiple-slip. While [112] oriented sample has the lower strain rate sensitivity exponent m≈0.108, lower strain hardening exponent n≈0.46, activation energy Q≈52 kJ/mol and deforms through cross-slip and twins together. The first activated slip system is {010}<100>in [110] orientation. The critical-resolved shear stress (CRSS) is 3.1 MPa which is depended on temperature. Deformation process is controlled by the cross--slip according to the activation energy and slip observation.
Original language | English (US) |
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Pages (from-to) | 1409-1414 |
Number of pages | 6 |
Journal | Jinshu Xuebao/ Acta Metallurgica Sinica |
Volume | 44 |
Issue number | 12 |
State | Published - Dec 2008 |
Externally published | Yes |
Keywords
- Activation energy
- Critical-resolved shear stress (CRSS)
- Cross slip
- Slip system
- Sn single crystal
- Strain hardening exponent
- Strain rate sensitivity exponent
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys