Activin Receptors by Shav-Tal Y., Lapter S., Parameswaran R. PDF

By Shav-Tal Y., Lapter S., Parameswaran R.

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2 Point Defect Relaxation 19 Fig. 4. Orientation dependence of the carbon Snoek maximum for iron single crystals (Ino and Inokuti 1972). Crystal orientations: 1, 6: 100 ; 2, 5: 111 ; 3, 4: 110 . 46 Hz transversal vibrations, the 111 direction of applied stress gives the maximal effect, the 100 direction the minimal effect, and 110 an intermediate one. 2 (Nowick and Berry 1972). 4E/9) · [C0 V · (λ2 − λ1 )2 /(RTm )]. 3 (Livshiz et al. 10). The presence of a preferred crystallographic orientation of grains in a polycrystal, a texture, also leads to a dependence of Qm −1 on the type of oscillations and on the direction of applied stress (Fig.

1990) Weller (2001) Bell and Owen (1967) Cheng et al. 8), and therefore an increase in vibration frequency is associated with an increase of Tm and decrease of Qm −1 for the same concentration of IA. In some cases Qm −1 ∝ (Tm − T0 )−1 (Nowick and Berry 1972), where T0 is the ordering temTm for low concentration perature of IA in a solid solution. However, T0 of IA, and the value T0 can be omitted. % O (Fig. 8; Weller et al. 1981b). 24 2 Anelastic Relaxation Mechanisms of Internal Friction Fig.

1983b) where it is still under discussion (see later). Concerning the relaxation kinetics in case of disorder, energy distributions of the interstitial sites occupied by hydrogen, as well as of the related saddle points in case of thermally activated jumps, must be taken into account. Site-energy distributions may range from quasi-discrete trapping sites in dilute alloys over varying metal atom configurations in concentrated solid solutions (chemical disorder) or elastic distortions near dislocations (topological disorder) up to broad continuous site-energy distributions in amorphous alloys (chemical and topological disorder).

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Activin Receptors by Shav-Tal Y., Lapter S., Parameswaran R.


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