On the plastic deformation of polycrystals
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. Web6 de jul. de 2010 · Polycrystals are continuous 3D collections of grains (crystallites), which, as assumed herein, can deform by cyrstallographic slip. As such, the actual solution to a problem of a deforming polycrystal is that of a highly complex elastic-plastic boundary …
On the plastic deformation of polycrystals
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Web26 de abr. de 2024 · The response of polycrystals to plastic deformation is studied at the level of variations within individual grains, and comparisons are made to theoretical … WebIn 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 …
Web6 de dez. de 2024 · Strong obstacles can greatly impede the motion or transmission of dislocations, which can be reflected by strain rate sensitivity and activation volume. In this study, the strain rate sensitivity and activation volume of overaged Al-Zn-Mg-Cu alloys with a grain size of 3.1 μm fabricated by powder metallurgy were measured by two different … Web11 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 microstructure consisting of primary α (α p) grains and transformed β (β trans) matrix is systematically investigated by in situ tensile testing in SEM.The results show that α p …
WebAbstract. Plastic deformation of b.c.c. polycrystals is investigated on the basis of a single-crystal deformation model. Many of the calculations previously only presented … Web11 de abr. de 2024 · ABAQUS支持导入多种几何模型格式，包括IGES、STEP、ACIS、CATIA等，其中IGES格式是ABAQUS默认的几何模型格式，可以用于导入Voronoi模型 …
Web15 de fev. de 2024 · The deformation mechanism and texture evolution of AZ31 Mg alloy compressed in three different directions at room temperature were studied, and the …
Web27 de nov. de 2024 · approach has successfully been applied to simulate the plastic deformation behavior of various crystalline materials in recent decades [12], from single crystal [13 ... 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 Section3, ... osvaldo daniel paganoWeb8 de out. de 1986 · Though Kro¨ner’s self-consistent model is not fully consistent in the elastic-plastic deformation of polycrystals, it is found to be perfectly consistent in the time-dependent deformation of ... osvaldo daniel camarottiWeb11 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. osvaldo collWeb14 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 ... osvaldo colinoWebpolycrystals and gives methods for solving problems related to the plastic deformation of metals. Along with the basic concepts, essential for the student or nonspecialist, much of the author's pioneering work is emphasized and is presented for the first time in book form. Focussing on plasticity, the text includes a chapter osvaldo diaz milbWeb8 de ago. de 2011 · The plastic behaviour of Co 3 (Al,W) polycrystals with the L1 2 structure has been investigated in compression from 77 to 1273 K. The yield stress … osvaldo chiavone filhoWebBased 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 … osvaldo corral univision