Origin of the anelastic behavior in Ti 50 Ni 44 Fe 6 alloy

2015 ◽  
Vol 108 ◽  
pp. 113-116 ◽  
Author(s):  
Shungui Zuo ◽  
Mingjiang Jin ◽  
Dan Chen ◽  
Xuejun Jin
Keyword(s):  
Anelastic Behavior

Nonlinear anelastic behavior and unloading-reloading constitutive models of severe plastic compressive deformation

2021 ◽  
Vol 294 ◽  
pp. 117128
Author(s):  
Hongli Hou ◽  
Guoqun Zhao ◽  
Liang Chen ◽  
Huiping Li
Keyword(s):  
Constitutive Models ◽  
Compressive Deformation ◽  
Anelastic Behavior

Elastic and anelastic behavior in poly (ethylene) oxide complexed with cesium salt

1992 ◽  
Vol 58 (1-2) ◽  
pp. 55-60 ◽  
Author(s):  
A Bartolotta
Keyword(s):  
Ethylene Oxide ◽  
Cesium Salt ◽  
Poly Ethylene Oxide ◽  
Anelastic Behavior ◽  
Poly Ethylene

Anelastic Behavior Modeling of SiC Whisker-Reinforced Al2O3

2010 ◽  
Vol 93 (3) ◽  
pp. 857-864 ◽  
Author(s):  
Juan Kong ◽  
Nikolas Provatas ◽  
David S. Wilkinson
Keyword(s):  
Behavior Modeling ◽  
Anelastic Behavior

Nonlinear Anelastic Behavior of a Synthetic Rubber at Finite Strains

1978 ◽  
Vol 22 (3) ◽  
pp. 239-258 ◽  
Author(s):  
D. Derman ◽  
Z. Zaphir ◽  
S. R. Bodner
Keyword(s):  
Finite Strains ◽  
Synthetic Rubber ◽  
Anelastic Behavior

Anelastic Behavior of Plasma-Sprayed Zirconia Coatings

2008 ◽  
Vol 91 (12) ◽  
pp. 4036-4043 ◽  
Author(s):  
Yajie Liu ◽  
Toshio Nakamura ◽  
Gopal Dwivedi ◽  
Alfredo Valarezo ◽  
Sanjay Sampath
Keyword(s):  
Anelastic Behavior ◽  
Plasma Sprayed

Elastic and Anelastic Behavior of Cu3Au at High Temperature

1986 ◽  
Vol 55 (2) ◽  
pp. 546-553 ◽  
Author(s):  
Kunihiko Iwasaki
Keyword(s):  
High Temperature ◽  
Anelastic Behavior

Elastic and anelastic behavior of several delta-stabilized plutonium alloys at low temperatures

1969 ◽  
Vol 30 (5) ◽  
pp. 1063-1070 ◽  
Author(s):  
M. Rosen ◽  
G. Erez ◽  
S. Shtrikman
Keyword(s):  
Low Temperatures ◽  
Anelastic Behavior

Viscoelasticity of the lower mantle from forward modeling of normal modes and solid Earth tides

2020 ◽  
Author(s):  
Ulrich Faul ◽  
Harriet Lau
Keyword(s):  
Absorption Band ◽  
Solid Earth ◽  
Lower Mantle ◽  
Normal Modes ◽  
Earth Tides ◽  
Solid Earth Tides ◽  
Anelastic Behavior ◽  
Body Tides ◽  
Anelastic Deformation ◽  
Intrinsic Dissipation

<p>Grain scale diffusive processes are involved in the rheology at convective timescales, but also at the transient timescales of seismic wave propagation, solid Earth tides and post-glacial rebound. Seismic and geodetic data can therefore potentially provide constraints on lower mantle properties such as grain size that are unconstrained otherwise. Current models of the transient viscosity of the lower mantle infer an absorption band of finite width in frequency. Seismic models predict a low frequency end to the absorption band at timescales corresponding to the longest normal modes of about an hour. By contrast, geodetic models infer the onset of an absorption band at these frequencies to cover anelastic deformation at timescales up to 18.6 years. A difficulty in extracting frequency dependence from mode and tide data is its convolution with depth dependence.</p><p>To circumvent this problem we select a distinct set of seismic normal modes and solid Earth body tides that have similar depth sensitivity in the lower mantle. These processes collectively span a period range from 7 minutes to 18.6 years. This allows the examination of frequency dependent energy dissipation over the lower mantle across 6 orders of magnitude. To forward model the transient creep response of the lower mantle we use a laboratory-based model of intrinsic dissipation that we adapt to the lower mantle mineralogy. This extended Burgers model represents an empirical fit to data principally from olivine, but also MgO and other compounds. The underlying microphysical model envisions a sequence of processes that begin with a broad plateau in dissipation at the highest frequencies after the onset of anelastic behavior, followed by a broad absorption band spanning many decades in frequency. The absorption band transitions seamlessly into viscous behavior. Since dissipation both for the absorption band and for (Newtonian) viscous behavior is due to diffusion along grain boundaries there can be no gap between the end of the absorption band and onset of viscous behavior.</p><p>Modeling of the planetary response to small strain excitation necessitates consideration of inertia and self gravitation. The phase lag due to solid Earth body tides therefore does not correspond directly to the intrinsic dissipation measured in the laboratory as material property. We have developed a self consistent theory that combines the planetary response with time-dependent anelastic deformation of rocks. Results from a broad range of forward models show that at lower mantle pressures periods of modes fall onto the broad plateau in dissipation at the onset of anelastic behavior. This explains the apparent frequency independence or even negative frequency dependence observed for some normal modes. At longer timescales, solid Earth tides fall on the frequency-dependent absorption band. This reconciles seemingly contradictory results published by seismic and tidal studies. Observations at even longer timescales are needed to constrain the transition from absorption band to viscous behavior.</p>

Anelastic Behavior of Nanocrystalline Fe-Cr Alloy Obtained by Mechanical Alloying

2010 ◽  
Vol 146-147 ◽  
pp. 780-784
Author(s):  
Zheng Cun Zhou ◽  
J. Du ◽  
H. Yang
Keyword(s):  
Internal Friction ◽  
Mechanical Alloying ◽  
Dynamic Modulus ◽  
Room Temperature ◽  
Milling Time ◽  
Grain Sizes ◽  
Free Decay ◽  
Before And After ◽  
Anelastic Behavior ◽  
Increasing Temperature

Anelastic behavior of nanocrystalline Fe-17 wt.%Cr alloy obtained by mechanical alloying was investigated using a multifunctional internal friction apparatus. Internal friction (Q-1) and relative dynamic modulus (f2) have been measured as a function of temperature by free-decay method from room temperature to 400oC for the ball-milled Fe-17 wt.%Cr alloy The specimens with different milling time were examined by XRD to determine the solid solubility of Fe and Cr atoms and detect the lattice strain of the compacted specimen before and after annealing. TEM observation was employed to obtain further information about the morphology and microstructure, especially crystalline size, of the milled Fe and Cr mixture powders. It has been suggested that the anelastic behavior of ball-milled nanocrystalline Fe-17 wt.%Cr alloy origins from the viscoelastic sliding at the interfaces resulting from the thermally-activating process. The damping increasing of the specimen with smaller grain sizes is larger than that of the specimen with larger grain sizes with increasing temperature since the former contains more interfaces. The increase in the relative dynamic modulus is attributed to the structural reordering with the lowering of lattice micro-strain that is produced during milling when temperature is over 300oC.

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