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is the source of discrepancy between the modeling and experimental flow stress. Key words: severe plastic deformation; multi-directional forging; non-isothermal annealing; dislocation density-based model... and simulations can be considered as good complements for experimental approaches. A dislocation density-based model called ETMB (Estrin, Toth, Molinari, Brechet) is widely used in Refs. [25,26......
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understood. It is still an unsolved question whether or not finer grain sizes down to 100nm could be reached. A semi-quantitative model for the evolution of dislocation cells in plastic deformation...-quantitative model of the evolution of dislocation distributions. By the theoretical analysis of this model, we obtain two generally noteworthy formulae and a criterion for the limiting cell size......
be obtained. The UCC on bike-sharing is reflected in the road network carrying capacity (RNCC) and parking facilities’ carrying capacity (PFCC). The space-time consumption method and density-based...: bike-sharing; urban carrying capacity; space-time consumption method; density-based spatial clustering of application with noise (DBSCAN) algorithm Cite this article as: YU Jia-jie, JI Yan-jie, YI Chen......
forces for grain growth of titanium alloy. Based on the identified mechanism, a microstructure evolution model including dislocation density rate equation and grain growth rate equation is proposed... for stage Ⅲ hardening of metals[10]. The model is based on the assumption that the kinetics of plastic flow is determined by a single structural parameter (dislocation density ρ) which represents......
method with force multipoles. The dislocation core structure of extended dislocation was modeled with the Peierls-Nabarro model discretized with a number of infinitesimal Volterra dislocations...:solution hardening; force multipole; solute atom; extended dislocation; Peierls-Nabarro model......
model was suggested which describes the generation of the misfit dislocation dipole in the system of the viscoelastic matrix containing a circular stiff nanoscale inhomogeneity. The critical condition...J. Cent. South Univ. Technol. (2008) 15(s1): 550-554 DOI: 10.1007/s11771-008-419-7 Equilibrium position of misfit dislocation dipole and critical parameters of buried strained nanoscale......
应力越大,FR位错源形成的位错环越小,并逐渐接近不考虑位错段间相互作用力时所形成的位错环.在相同加载应力时,Peierls应力越大,形成的位错环也越大.阻尼系数只影响位错环形成的时间,而不影响形成的大小.位错的这种非线性演化方式,是位错段间存在相互作用力引起的. 关键词:Frank-Read位错源; 位错动力学模型; 细观级模拟; Frank-Read dislocation source; model of dislocation dynamics; meso-scale simulation; [全文内容正在添加中] ......
: To investigate the effect of the electropulsing on dislocation mobility, specimens cut from the cold-rolled titanium sheet were treated by high density electropulsing with the maximum current density of 7.22... with model of the dislocation-induced damping [13,14]. Furthermore, Fig. 5 shows the elastic moduli for the specimens C, D and E decrease linearly with increasing temperature and are not obviously soft during......