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J. Cent. South Univ. (2019) 26: 2930-2942 DOI: https://doi.org/10.1007/s11771-019-4225-1 Modified constitutive model and workability of 7055 aluminium alloy in hot plastic compression ZHANG Tao(张涛...-strain curves of 7055 aluminium alloy under different conditions are obtained and the flow stress increases with ascending strain rate and descending temperature. For Arrhenius constitutive equation, each......
of 20CrMnTi and obtain its constitutive equation, the isothermal compression tests of 20CrMnTi were carried out using the Gleeble–3500 thermo-simulation machine, up to a 60% height reduction of the sample at strain rate range from 0.01 s–1 to 10 s–1 and deformation temperature range from 1123 K to 1273 K. According to the experimental results, the constitutive equation of 20CrMnTi was established based......
> Abstract: The void evolution equation and the elastoplastic constitutive model of casting magnesium alloy were investigated. The void evolution equation consists of the void growth and the void... follows a normal distribution. A softening function related to the void evolution was given. After the softening function was embedded to a nonclassical elastoplastic constitutive equation......
In the plastic deformation processes, the deformation load and energy required are decided by the flow stress. While the most important use of a constitutive equation was to calculate the flow stresses..., the plastic deformation simulation was performed on typical hot-rolled AZ31 magnesium alloy. The constitutive relationship was established with the experimental data. The material parameters during......
Constitutive equation and hot deformation characteristic of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy with equiaxed microstructureHUANG Lujun,GENG Lin,LI Aibin,WANG Guisong,and SHI Lei School of Materials... microstructure was characterized in the temperature range of 900~1060 ℃ and strain rate range of 10-3~10 s-1.The experimental results indicate that the plastic deformation behavior of the titanium......
and the constitutive relation involving the void evolution. By assuming the voids in casting magnesium alloys were spherical, the growth equation of the voids was obtained from the incompressibility... of the voids was presented. By introducing the presented void-evolution equation to a nonclassical elastoplastic constitutive equation, a constitutive model involving the void evolution was put forward......
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was used to improve the function of the classical Maxwell model and define a new visco-elasto-plastic constitutive model consisting of 5-components (VEP-5C model) in series with the improved Maxwell model... the observed rate-dependent fracture phenomena from static to high strain-rate impulse loading. LI and GU[11] got the constitutive equation for rock undergoing impacting by curve fitting. CHANG and YANG[12......
milling and the micromechanics of composite material, a plastic constitutive equation is implemented for milled composite powders. To check the equation, the extrusion of Ti/Al composite powders prepared... with experimental results. Key words:high energy milling; composite powder; plastic constitutive equation; extrusion; numerical simulation; [全文内容正在添加中] ......
constitutive equation[12], because such phenomenon is very complicate. WANG and ZHOU[11] performed the recovery tensile impact tests in a bar-bar tensile impact apparatus (BTIA, a kind of Split... Johnson-Cook thermo-viscoplastic constitutive equation as follows: σ = σ0.015+s(ε-0.015) = (3......