Indicatory surface of anelastic-elastic properties of Ti alloys

Abstract

The simultaneous influence of hydrogen H and ultrasound deformation on internal friction Q −1 and dynamic elastic modulus E of intermetallic Ti3Al alloy after cutting and polishing were studied. The relaxation maximum of internal friction Q −1 M1 at temperature Т М1 ≈ 398 К, conditioned by the mechanism caused by reorientation interstitial atoms in dumbbell configurations H-H was discovered. Internal friction maximum Q −1 M2 in intermetallic Ti3Al at temperature T M2 ≈ 439 K was discovered with an activation energy H 2 = 0.86±0.1 eV. 2D and 3D atomic force microscopy microstructure images of Ti (VT8) alloy after mechanical and thermal treatment are presented. Strengthening of Ti alloys is related to the cooperation of dislocations with point defects.

Anelastic Internal Friction and Mechanical Spectroscopy of SiO2/Si Wafers

“…The measurement of IF temperature dependence Q −1 (Т) was performed 16,17 on p-type Si wafer, orientation (100), boron-doped B, with specific electrical resistance ρ ≈ 7.5 Ohm × cm, thickness h SiO2/Si ≈ 460 × 10 3 nm after application of SiO 2 layer with thickness h SiO2 ≈ 100 nm in Fig. 2 as the result of high-temperature oxidation in dry O 2 at T о ≈ 1300 K. AFM confirmed the presence of a SiO 2 /Si wafer relief.…”