equationThe steady state creep rate equdtion ofa nickel base superalloy Inconel 718, strengthenedby coherent ordered disc-shaped bct γ11 phaseand coherent spherical fcc γ1 phase precipitates,has been established in the stress and temperatureranges of 620-840 MN m-2 and 853-943K, respecti-...
Mathematically, the phenomenological creep rate equation can be written as [9]ε˙=S(DL/b2)(λ/b)3[(σ−σ0)/E]8 where DL is lattice self-diffusion coefficient, λ subgrain size, E Young's modulus, and S a numerical constant. In general, thermal mismatch between ceramic reinforcement...
The empirical rate equations of solid state reactions such as recovery of deformed metals, clustering, and transient creep are all of the same type, referred to here as recovery kinetics. For two systems, transient creep in fcc metal crystals and the first stage of tempering of Fe–C and Fe...
Constant-stress creep tests were performed on OFHC copper at 425° C and the data used to evaluate the proposed equation.关键词: Theoretical or Mathematical/ copper creep crystal defects grain boundaries/ cavity growth creep rate net stress rate equation Cu void growth grain boundaries/ A6170N ...
5. Because of this, a proper creep constitutive equation is very important. 因此,一个合适的描述流变现象的本构方程是非常重要的。 6. Machine Sizing Block rubber has creep phenomenon, to be stabilized after 14 days, and called for the use of machine adjusted once the level after 14 days. ...
Then, by approximating the surface by a sphere of radius 蟻 and center 伪 ij, the constitutive equation of creep rate e c ij and the evolution equations for 蟻 and 伪 ij are formulated in analytical form. It is proved that the present theory coincides with the modified strain-hardening ...
Steady‐State Creep through Dislocation Climb A dislocation climb creep model is considered which does not require the production of immobile dislocations. The creep equation that results from the anal... J Weertman - 《Journal of Applied Physics》 被引量: 827发表: 1957年 加载更多研究...
The creep equation that results from the analysis iscreep rate=Aσ3sinh(Bσ1.5/kT)exp(Q/kT), whereAandBare constants, σ is the stress,Qis the activation energy of creep andkThas its usual meaning. This equation is quite similar to one previously proposed. 关键词: CiteSeerX citations ...
Equation (4.73) is utilized to predict the creep rate of Al which is compared with the experimental data from various authors in Fig. 4.13. It is found from the figure that the curve predicted by Eq. (4.73) is in a good agreement with the experimental data. A constant internal stress σ...
Study on the display formula of the rate constant α of the creep equation by the modified θ projection applied to the turbine material (modified theta projection)Materials science, Computational mathematics, Discrete cosine transform, Creep equation, Interpolation, Rate constant α...