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of TGA data is that the CR approach is generally unsuitable for determination of kinetic parameters. Key words: kinetic analysis; Coats-Redfern equation; nonisothermal TGA; rate equation; Arrhenius...) are the Arrhenius parameters. These parameters together with the reaction model are sometimes called the kinetics triplet. Under non-isothermal conditions, in which a sample is heated at a constant rate......
, and then the stress changes slowly and tends to be stable under the action of work hardening, dynamic recovery and recrystallization. The material parameters of the conventional Arrhenius constitutive... at high strain rate. (3) The Arrhenius constitutive model was established to predict the flow stress, material parameters under the coupling of strain, temperature and strain rate are obtained by multi......
) is a predominant hot deformation mechanism, especially at elevated temperatures and low strain rates. The modified Johnson-Cook (J-C) and the strain compensated Arrhenius-type models were developed to predict the hot flow behavior under different deformation conditions. The correlation coefficients of modified J-C model and the strain compensated Arrhenius-type models were 0.9914 and 0.9972......
and Arrhenius activation energy Tasawar HAYAT1, 2, Arsalan AZIZ1, Taseer MUHAMMAD3, Ahmed ALSAEDI2 1. Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan; 2. Nonlinear Analysis... parameters is pivotal part. Physical amounts like surface drag coefficients, transfer of heat and mass rates are portrayed by numeric esteems. It is noticed that impacts of porosity parameter......
. The strain-compensated Arrhenius (SCA) model is established to extend its application under different strain conditions. The functional relationship between model parameters and strain is described by n...-tang, ZHOU Jie. The improved Arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy [J]. Materials Research, 2013, 16(4): 785-791. [21] DONG En......
materials. Key words: doped glass; dielectric spectroscopy; electric modulus; AC conductivity; activation energy; Arrhenius equation 1 Introduction The competition of speed, cost and reliability of opto... of the sample to serve the purpose of dielectric measurement. The physical parameters like density, refractive of these glasses are given in Table 2. Table 2 Density, molecular mass and refractive......
Trans. Nonferrous Met. Soc. China 22(2012) s457-s464 Modelization and comparison of Norton-Hoff and Arrhenius constitutive laws to predict hot tensile behavior of Ti-6Al-4V alloy ZHANG Chao1, 2, LI... of 923-1023 K and strain rate range of 0.0005-0.05 s-1 were used to develop the constitutive equation. Arrhenius and Norton-Hoff constitutive models were proposed to characterize the tensile behavior......
stress-true strain data, the constitutive relationships were comparatively studied based on the Arrhenius-type model, Johnson-Cook (JC) model and artificial neural network (ANN), respectively... of 20MnNiMo low carbon alloy is significantly influenced by the strain rate and deformation temperature. Compared with the Arrhenius-type model and Johnson-Cook (JC) model, the ANN model is more......
Trans. Nonferrous Met. Soc. China 23(2013) 508-516 Arrhenius relationship and two-step scheme in AF hyperdynamics simulation of diffusion of Mg/Zn interface Yong-quan WU, Xiu-ming LU, Tong SHEN... for equilibration. The results show that: the Arrhenius equation works well for the description of Dz with different accelerating factors; the AF has no effect on the diffusion constant D0 in the case......
变形行为和组织演变.通过对实验数据的分析,拟合建立材料的高温流变模型,并分析Johnson-Cook(JC) 模型和Arrhenius模型对超临界马氏体不锈钢的适用性.研究结果表明:修正后的JC模型和Arrhenius模型具有更高的精度.在应变速率较高时,修正的JC模型的预测值更接近实验值;在应变速率较低时,应变补偿的Arrhenius模型的预测值更接近实验值.载荷预测结果与实验值拟合程度较好,表明建立的模型能够描述材料的高温流变行为. 关键词:马氏体不锈钢;流变应力;Arrhenius模型;本构模型 中图分类号:TG146.2 文献标志码:A 文章编号......