On the plastic deformation of polycrystals
Web1 de jul. de 1998 · The extended Taylor assumption of uniform deformation gradient among grains was applied in 3-D polycrystal plasticity simulations for complex loading paths at finite strain for OFHC Cu using the Los Alamos polycrystal plasticity (LApp) code (Kocks et al., 1994). Comparisons of both stress-strain behavior and texture evolution, with and … Web1 de jun. de 2004 · Theoretical investigations of polycrystals have attempted to show how the inhomogeneity of the plastic deformation between neighboring grains may be …
On the plastic deformation of polycrystals
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Web1 de mar. de 2014 · Here, the response of polycrystals to plastic deformation is studied at the level of variations within individual grains, and comparisons are made to theoretical calculations using crystal plasticity (CP). We provide a brief overview of CP and a review of the literature, which is dominated by surface observations. Web11 de abr. de 2024 · However, in Cu polycrystals with Ta as the solution element, the strength of random distribution was higher than that of segregated distribution. 14 14. J. Chen, ... the loading process (15 ps), the dislocation density grows with the decrement of the grain size, indicating a greater plastic deformation.
Web1 de out. de 2024 · 4.2 Experimental spectra of the grain boundaries in FCC polycrystals. ... 8.1.Methods of producing ultrafine—grained and nanostructured materials by severe plastic deformation. 8.2 Effect of the parameters of quasi—hydrostatic pressure on the microstructure and grain boundary ensembles in nickel. WebBased on Hill's method, a self-consistent averaging scheme is proposed for estimating the overall, finite deformation response of polycrystalline aggregates consisting of single crystals which undergo plastic flow by rate-dependent crystallographic slip, accompanied by elastic lattice distortion. First, constitutive relations for such single crystals are developed …
WebThere is extensive dislocation annihilation during deformation at these two temperatures, particularly in the two aluminiums and particularly in fine grains. The behaviour of the … Web10 de mai. de 2024 · must occur for plastic deformation (Ando et al., 2010). However, all of th e slip systems mentioned still provide only four independent slip system which is still …
Web3 de nov. de 2016 · A modified Sachs approach to the plastic deformation of polycrystals as a realistic alternative to the Taylor mode. In: Haasen P, Gerold V, Kostorz G, eds. The …
Web1. A new deformation model which explains the effect of grain boundary strengthening in polycrystalline metals is proposed which is based on the significant role of grain orientation. 2. An analytical expression is obtained for the coefficient Ky which can be used to explain practically all of the known characteristics of plastic deformation in polycrystalline … the people\u0027s choice family fun centerWeb11 de abr. de 2024 · The deformation mechanism, crack initiation, propagation and fracture behavior of a new near-α titanium alloy Ti80 (Ti-6Al-3Nb-2Zr-1Mo) with a bimodal … the people\u0027s choice credit unionWeb22 de jun. de 2024 · The plastic deformation of each of the crystal grains in a polycrystal is substantially similar to that of a single crystal, and the polymorphous plastic shape is … sibelius change tempoWebdeformation, using a two-dimensional polycrystalline model. These examples clearly show that the rate-dependent crystallographic slip on the level of single crystals … sibelius chord diagramWebIn the last part of Section 2, a 4-parameter Voce-type hardening law is proposed to mimic the plastic behavior of the polycrystals by the non-local crystal plasticity model. In Section 3 , the influence of the non-local crystal plasticity parameters is studied by changing them in a range, and the trends of the proposed hardening law parameters are obtained by … the people\u0027s choice awards winnersWeb14 de abr. de 2024 · PDF Understanding of deformation and degradation of bulk metals under loading is necessary to improve the safety and environmental performance of... Find, read and cite all the research you ... sibelius cheapWeb23 de mar. de 2001 · At the same time, textures in minerals and rocks are vital sources revealing information about geological processes. Textures evolve during plastic … the people\u0027s choice awards vote