The development of additive manufacturing (AM) technology provides higher feasibility for designing and lattice structures. However, the process usually generates residual deformation stress, even produces cracking, thus affecting performance parts. This work establishes a simulation model Ti-6Al-4V structures during laser powder bed fusion (LPBF) based on inherent strain method. Effects geometric parameters (inclination angle, rod diameter, length) stress are analyzed. Based results,...

Unlike conventional homogeneous nanograined (NG) materials, gradient structured materials combine high strength and ductility. The (GNG) structures are divided into three zones by grain size: the small‐grained zone, transition‐grained large‐grained zone. Molecular dynamics (MD) simulation is performed to investigate effect of widths on GNG with different sizes. results reveal strengthening mechanism from perspective microstructure evolution. With change in size, dominant deformation mode...

Graphene-reinforced aluminum matrix composites (GRAMCs) attract great interest in industries due to their high performance potential. High-temperature processes such as sintering and aging are usually applied during the preparation of GRAMCs, leading grain coarsening that significantly influences its properties. In this work, a modified 3D Monte Carlo Potts model was proposed investigate effect content size graphene on evolution heat treatment GRAMCs. Grain growth with contents from 0.5 wt.%...

The distribution of grains plays a crucial role in determining the strength polycrystalline copper when grain size is constant. Herein, mechanical properties homogeneous nano‐grained (HNG) and gradient (GNG) coppers with different distributions are examined using molecular dynamics (MD) simulations. HNG‐ordered structure has all triple junctions (TJs), whereas random contains many quadruple quintuple junctions. When below critical inverse Hall–Petch relationship, high‐density TJs effectively...

Three-dimensional lattice structures with high specific strength, stiffness and low apparent density, are widely employed across multiple engineering fields. Under uniaxial compressive loading, the structure may experience local buckling or global buckling. This paper conducted a systematic parametric study of various factors affecting behavior multilayer pyramid to investigate mechanism two main instability modes, It was found that critical load increases increase in size unit cell...

Laser beam machining is one of the most widely used advanced processing techniques, which can be applied to compound materials. As a large number photons are absorbed into composite, subsequent local heat storage, charring and potential delamination make study for effect laser on complex materials become significant. In this paper, carbon fiber epoxy composite laminated sheet irradiated by continuous wave chemical oxygen iodine laser. The peak temperature front surface, distribution rear...

The 3D lattice structures have the characteristics of lightweight and high strength, showing good energy absorption under impact loads. Herein, stretching–bending synergistic lattices are constructed, with macroscopic backbone in stretching‐dominated configuration mesoscopic cells bending‐dominated configuration. organically combine two deformation mechanisms stretching dominant bending to exhibit specific strength excellent absorption. particular model analyzed. dynamic compression response...

In order to study on tensile and fatigue fracture mechanism of friction stir welded (FSW) joints, the behavior FSW joints are studied based microstructure strain distribution. The large plastic deformation occurred in thermo-mechanically affected zone (TMAZ) retreating side tension tests. High contents shear texture small angle grain boundary reduce mechanical property TMAZ material. weak area for is by loading condition. concentration nugget (WNZ) base material makes liable happen these...

Microstructures is an international peer-reviewed, open access, online journal. The journal of publishes articles covering new research and developments, perspectives, reviews related to the microstructures materials, including, but not limited metals alloys, ceramics, polymers, composites, crystals, glasses, biomaterials, interfaces nanomaterials.

The equivalent mechanical properties of pyramidal lattice materials were established by theoretical analysis and numerical simulation. According to the deformation unit cells multi-layered under action vertical, horizontal, shear forces, elastic modulus, Poisson’s ratios in three main directions derived. influence cell parameters on analyzed at constant relative density material. With increase inclination angle strut, modulus z-direction(Ez) increases, x-direction(Ex) y-direction(Ey) first...

During heat treatment or mechanical processing, most polycrystalline materials experience grain growth, which significantly affects their properties. Microstructure simulation on a mesoscopic scale is an important way of studying growth. A key research focus this type method has long been how to efficiently and accurately simulate the growth caused by non-uniform temperature field with gradients. In work, we propose improved 3D Monte Carlo Potts (MCP) quantitatively study relationship...

Tetrahedral lattice materials can be used as the core of a sandwich structure. The properties tetrahedral controlled by modifying their geometrical parameters and relative density. In this paper, structure deformation mechanism-based theoretical analysis model is established to predict effective mechanical under compressive shear loadings. analytical solutions are subsequently verified finite element large-scale material model. Based on obtained results, effects parameters, density,...

Three types of composite specimens with different off-axis angles after indentation were subjected to progressive tensile loading, and the results showed that although strength is reduced an increase in fiber orientation angle, such off-axial structure can enhance impact-resistance capacity. An acoustic emission (AE) signals analysis data be divided into categories correlate three damage modes. The AE peak frequency characteristics each mode also identified for both without indentation,...

Molecular dynamics simulations of body-centered cubic (bcc) iron thin films with crack defects were carried out by adopting methods EAM (Embedded Atom Method) potential, spin/exchange potential and spin/neel potential. In this article, the effects variation distance between two their directions on magnetostrictive properties are studied, corresponding microscopic mechanism is also analyzed. The results show that affect atomic magnetic moment nearby, vary direction spacing defects. If defect...

The yield surfaces and the evolution of a bending-dominated pyramidal lattice material under complex stress states considering coupling effect axial force bending moment strut are studied theoretically. two-dimensional primary surfaces, secondary complete materials two kinds cross-section struts obtained, analytical expressions established. effects inclination angle diameter-to-length ratio on with circular cross-sections discussed. results provide basis for analyzing homogenized plastic...