Weakening the mechanical property anisotropy of additively manufactured medium entropy alloy by controlling the cellular structure

Microstructure and mechanical properties of an in-situ TiB2 particle reinforced AlSi10Mg composite additive manufactured by selective electron beam melting

Herein, a novel corrugated inner rib reinforced tubular structures and a gradient design method are proposed. The mechanical response, interaction effect and gradient effect of the proposed tubular structures are systematically studied by means of experiment and numerical simulation. It is found that the corrugated inner rib reinforced tubular structures exhibit a progressive and stable deformation process under axial compression. Compared with the traditional straight inner rib reinforced tubular structures, the initial peak crush force (IPCF) of the corrugated inner rib reinforced tubular structure has a maximum decrease of 26.07%, and the mean crush force (MCF), crush force efficiency (CFE), specific energy absorption (SEA) has a maximum increase of 40.71%, 49.03% and 49.82%, respectively. In addition, Co-Co-inner-2 has a considerable interaction effect, which increases its energy absorption by 249.77%. However, although the gradient configuration effectively improves the SEA and MCF of the tubular structure, it brings an increase in IPCF. The SEA capacity of the corrugated inner rib reinforced tubular structures in this work is 27.12–56.77 J/g, which shows a satisfactory weight efficiency. The proposed structures can provide a useful reference for energy absorption devices in the national defense, aerospace and automotive industries. 

Mechanical behavior and crashworthiness assessment of corrugated inner rib reinforced tubular structures

Unique cellular microstructure-enabled hybrid additive and subtractive manufacturing of aluminium alloy mirror with high strength

This article presents a fabrication strategy on the structural design, optimization, additive manufacturing, and processing of metal mirror. Specifically, the study showcases the topology design of a metal mirror with diameter of 200 mm, the additive manufacturing of standard aluminum-based powder (AlSi10Mg), the high-precision single-point diamond turning process of the surface. By setting the feasible domain partition, a topology optimization model suitable for metal additive manufacturing and subsequent surface shaping was constructed, which takes into account the multi-load machining load conditions of single-point diamond turning technology and the material topology representation of standard support structures for additive manufacturing. The results demonstrate that the optimization model effectively suppresses the vibration phenomenon during single-point cutting. Furthermore, the results of the optical interferometer surface inspection confirm that the design and processing strategy for additively manufactured metal mirrors demonstrated in this study can be directly applied to infrared band reflective imaging optical systems. 

Fabrication Strategy of Additively Manufactured Metal Mirror Based on Multi-Load Topology Optimization and Single-Point Diamond Turning

Anisotropy reduction of additively manufactured AlSi10Mg for metal mirrors

Design of diffractive optical system based on particle swarm optimization algorithm

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Anisotropy reduction of additively manufactured AlSi10Mg for metal mirrors

Design of diffractive optical system based on particle swarm optimization algorithm