[PDF] Top 20 Estudio comparativo de la calidad de las bibliotecas universitarias españolas

... the crystal plasticity theory is capable to predict both global and local stress–strain responses (Kothari and Anand 1998; Balasu- bramanian and Anand 2002; Hasija et ...tic deformation in metallic alloys ... See full document

... a crystal-plasticity based constitutive framework to simulate the response of the polycrystalline micro- structure of these ...a dislocation-density based crystal plasticity formulation ... See full document

... zigzag dislocation motion in the matrix ...distinct plastic anisotropy were inhibited, and isotropic deformation, consisted of the dislocation motion in matrix channel and {111}h101i shear ... See full document

... undergo deformation from spherical to cubic to dendritic from nucleation to ...Ni-based superalloy Rene 80 during the cooling process after solution ...solidified superalloy (DS) ...hindered ... See full document

... the single crystal Ni-based superalloy ...was single-crystal, the orientation of SRZ region was different from that of the ...the single-crystal substrate took place ... See full document

... with crystal plasticity was ...FE modelling of crack growth, mesh should be con- formed to geometric discontinuity ...analyses based on our experience with crack deformation mod- elling for ... See full document

... a nickel-based superalloy is usually complicated, composing of several kinds of solute elements like aluminum, molybdenum, tungsten, chromium tantalum and ...the deformation on alloys can ... See full document

... can, under certain physical conditions, evolve in time and space and even interact with each other. At certain physical conditions, e.g., at low homologous temperature, the motion is only two-dimensional and dislocations ... See full document

... model, based on the principles of nonequilibrium thermodynamics, for polycrystalline ...constitutive modelling is done in a physically consistent way considering dislocation motion and ... See full document

... dominant deformation mechanism in this region is due to dy- namic recrystallisation ...higher deformation velocity is available, these two domains are con- sidered as the most favourite region for hot ...of ... See full document

... a dislocation core can be split into a nonlinear core region, where continuum mechanics fails to provide an adequate description and a far-field region, where continuum solutions suffice, see ([5], Chapter 10) or ... See full document

... As the inlet gas temperature in a current gas turbine system has already reached 1773 K (which is well above the melting points of Ni-based superalloy substrates), 1) thermal barrier coatings (TBCs) on the ... See full document

... molecular dynamics (MD) ...tool. Based on the radial distribution function, they found that the ultimate depth of the deformed layer of a specimen is ...on single-crystal copper. A new ... See full document

... but using the same criteria for all areas of the sim ulation was reported to lead to very low values of critical nucleation ...a single breaking criterion, th a t fracture was biased away from the crack tip ... See full document

... elements. Crystal growth was then performed by means of the vertical Bridgman method (VBM) in an electric furnace with a temperature gradient where a temperature gradient at the solidification point and a growth ... See full document

... methods based on the concept of ge- ometrically necessary dislocations have been successful in explaining size effects in problems where the gradients of the strain field are ...fabricated using the FIB ... See full document

... including nickel-based chromium alloys, comprising mainly nickel, chromium, iron, carbon, and molybdenum in ...in nickel-based chromium alloys, dislocation density interactions ... See full document

... SC superalloy with a cylindrical rod is directionally solidified in [001]- ...SC superalloy was ...SC superalloy was solution heat-treated at 1274 C for 8 h under argon environment and subsequent by ... See full document

... The Single crystal superalloys are characterized with the super ability to withstand high temperature and have been widely used as aeronautical engine turbine blades because almost all the grain boundaries ... See full document

... high dislocation density materials is considered as ...edge dislocation movement while the nucleated shear loop develops into a Frank­Read ...high dislocation density materials already contain many ... See full document