Long-term creep tests on the solid-solute-strengthened zirconium alloy, i.e., Zircaloy-4, revealed presence of double steady-state behavior at 623–673 K. The first steady state manifested as a faster strain rate (ε) ∼0.05, and second appeared with slower ε > 0.1. Several electron microscopy change in dislocation structure during from motion individual dislocations to generation cell structure. ...

This study examines how thermal creep affects the mixed convection in a long horizontal parallel-plate microchannel under a pressure drop and a temperature rise. The analytical solutions of the fully developed thermal-flow fields and the corresponding characteristics are derived based on the Maxwell boundary conditions with thermal creep and presented for the physical properties of air at the s...

Clarifying the time-dependent strength deterioration characteristics of carbonaceous mudstone under dry and wet cycles is great significance to design expressway cut slopes. In this work, we conducted triaxial compression creep tests on specimens that had undergone different numbers investigate their properties. A function was established between steady-state viscoplastic rate axial compression...

The creep behaviour of hot hammer forged Ti-6Al-4V alloy under different forging temperatures has an essential influence on their high-temperature service performance. In this article, the mechanical property and at were first investigated experimentally. Then, in view critical effect microcracks other defects life components forging, characteristics tip a 2 mm crack characterized by finite ele...

In design of anaerobic bioreactor, rate equation is commonly used. Mathematical model was developed at steady state condition, to project concentration of gaseous substrate and product in biological oxidation of carbon monoxide with water to produce hydrogen and carbon dioxide. The concept of bioconversion was based on transport of CO from gas phase to liquid phase, as the CO consumption was in...

The relaxation by creep recovery of plasticized poly lvinyl chloride) (PVC) was tested in relation to applied stresses and working temperatures. The relaxation time increased with stress but decreased with temperature. From the temperature dependence of relaxation times, an energy of 0.21 eV was found to activate the creep recovery process. It is thought that creep recovery is effected by the c...