Bo Song

Huazhong University of Science and Technology | hust · School of Materials Science and Engineering

Based on the advantages of triply periodic minimal surface (TPMS) porous structures, extensive research on NiTi shape memory alloy TPMS scaffolds has been conducted. However, the current reports about TPMS porous structures highly rely on the implicit equation, which limited the design flexibility. In this work, novel shell-based TPMS structures we...

It is difficult to fabricate dense and high-performance pure copper with most commercial medium-power fiber laser additive manufacturing machines due to its high laser reflection and thermal conductivity. The modification of the copper surface with high laser absorptance particles is an economical and effective way. However, the additions of high l...

Continuous industrialization and other human activities have led to severe water quality deterioration by harmful pollutants. Achieving robust and high-throughput water purification is challenging due to the coupling between mechanical strength, mass transportation and catalytic efficiency. Here, a structure-function integrated system is developed...

Combining recycling and additive manufacturing (AM) can bring significant environmental and economic advantages. Using recycled materials can help reduce waste and the need for virgin materials, which can be resource-intensive to extract and process. Recycling is also more energy-efficient than extracting and processing virgin materials. This paper...

NiTi alloys have drawn significant attentions in biomedical and aerospace fields due to their unique shape memory effect (SME), superelasticity (SE), damping characteristics, high corrosion resistance, and good biocompatibility. Because of the unsatisfying processabilities and manufacturing requirements of complex NiTi components, additive manufact...

Carbon-supported nanoparticles are indispensable to enabling new energy technologies such as metal-air batteries and catalytic water splitting. However, achieving ultrasmall and high-density nanoparticles (optimal catalysts) faces fundamental challenges of their strong tendency toward coarsening and agglomeration. Herein, we report a general and ef...

Carbon is ubiquitously used as catalyst supports in various clean energy technologies, particularly emerging electrocatalysis, yet it often suffers slow oxidation and corrosion along with performance degradation. The harmonious combination of refractory silicon carbide (SiC, chemically inert) with carbon is alluring but often a great challenge, par...

Scandium is the best alloying element to improve the mechanical properties of industrial Al-Si-Mg casting alloys. Most literature reports devote to exploring/designing optimal Sc additions in different commercial Al-Si-Mg casting alloys with well-defined compositions. However, no attempt to optimize the contents of Si, Mg, and Sc has been made due...

Al-Si-Mg series alloys are the most common alloys available for additive manufacturing forming with low cracking tendency. However, there is no systematic study on the computational design of SLMed Al-Si-(Mg) alloys due to the huge parameter space of composition and processes. In this paper, a high-quality dataset of SLMed Al-Si-(Mg) alloys contain...

The porous metallic biomaterials have attracted significant attention for implants because their lower young's modulus matches the human bones, which can eliminate the stress shielding effect and facilitate the growth of bone tissue cells. The porous metallic biomaterials fabricated by selective laser melting (SLM) have broad prospects, but the sur...

Achieving a homogeneous equiaxed grain structure and breaking the strength–ductility trade-offin ad- ditively manufactured aluminum alloys is a great challenge. In this paper, we propose a novel duplex nucleation mechanism that combines ex situ TiB 2 and in situ Al 3 Ti for controlling the grain structure of additively manufactured AlCuMgTi-TiB 2 c...

增材制造技术为高强铝合金复杂零部件的制造带来了前所未有的机遇， 但目前增材制造铝合金体系仍 局限于可铸造和可焊接的 Al-Si 系合金， 制约了高性能增材制造铝合金的快速发展。近年来， 不同尺度的计算 方法逐步用于辅助高性能增材制造铝合金的开发。本文详细综述了国内外学者在计算辅助增材制造铝合金 设计与制备领域的研究成果， 列举了原子、 介观和宏观尺度计算模拟及机器学习等计算方法辅助增材制造铝 合金设计的代表性案例， 分析了不同计算方法辅助合金设计的策略， 并指出其不足。最后， 针对如何推动多尺 度计算在高性能增材制造铝合金开发中的应用进行了展望， 并指出其发展方向。 Additive manufacturing technology has greatly increased opportu...

Low-frequency noise is harmful but difficult to be removed due to the long wavelength and low dissipation coefficient. Acoustic absorption metamaterials (AAMs) can absorb low-frequency sound waves within a deep sub-wavelength scale using discrete cavities and have attracted extensive attention in electronics, automotive engineering and aerospace ap...

Pentamode material (PM) possesses great potential in underwater acoustic metamaterial device applications due to its broadband and solid-state merits. Previously proposed PM devices are all designed with single materials, where the additional weights for mass adjustment are connected directly to the struts for modulus adjustment. The coupling effec...

Additive 3D printing has been one of the most powerful and effective techniques to realize 3D intricate structures. However, its limitations including a high threshold for high-precision preparation and poor surface roughness in metalworking impede further development, such as metallic pentamode metamaterials (PMs) due to the special structural reg...

Plate lattices are an emerging class of lightweight mechanical metamaterials that exhibit superior mechanical properties. The unique architectures of plate lattice metamaterials are regarded as the origin of achieving such advanced performance, but they lead to the difficulty of powder removal after the powder-bed-based additive manufacturing proce...

Biomimetic metallic biomaterials prepared for bone scaffolds have drawn more and more attention in recent years. However, the topological design of scaffolds is critical to cater to multi-physical requirements for efficient cell seeding and bone regeneration, yet remains a big scientific challenge owing to the coupling of mechanical and mass-transp...

With the development of structural architectures, the demand for metamaterials with multiphysical characteristics has increased. The relationships between different properties, such as mechanical and mass-transport properties for bone scaffolds, are often mutually conflicting. Consequently, the optimization of these properties for metamaterials str...

The inherent absorption frequency of traditional sound absorbers is difficult to solve the problem of acoustic wave removal in the changeable acoustic environment. In this study, acoustic absorption metamaterials (AAMs) with adaptable sound absorption performance were innovatively designed through the structural combination concept and fabricated b...

In bone scaffolds, the mechanical performance provides the load-bearing capability, and the mass-transport performance presented as permeability dominates the nutrients/oxygen transportation efficiency. Body-centered-cubic and face-centered-cubic plate lattice scaffolds with mechanical and mass-transport performance closing to human bones are propo...

Light‐weight, high‐strength metamaterials with excellent heat dissipation and energy absorption capabilities are of great interest to aerospace and automobile applications. Particularly, innovative structure design and its successful realization are paramount but often challenging due to the vast design space and associated complex manufacturing. H...

Three-dimensional (3D) printed magnetic soft architectures have attracted extensive attention and research from the engineering and material fields. The force-driven shape deformation of such architectures causes a change in the magnetic field distribution, indicating the capability to convert mechanical energy to electricity. Herein, we fabricate...

The formation of balling, porosity and cracking defects is a vital obstacle in selective laser melting of wrought Al alloys. However, it lacks systemic research on the origins of these imperfections. Herein, the formation mechanisms and avoidance methods of metallurgical defects in SLM-processed Al-Cu-Mg alloy were investigated by numerical simulat...

Rapid development in 3D printing technology has stimulated enthusiasm in the functional design of metamaterials with unique properties, in which multiple properties should be simultaneously optimized. However, this is challenging because different properties, such as mechanical and mass-transport properties, are often coupled strongly and cannot be...

Obstacle avoidance is of great importance for mobile robots since it provides protection for the robots’ safety and ensures their routine operations. Sensors are proven to play an important role in robots obstacle avoidance, and they are useful as well. However, more sensors indicating additional space, larger weight load and more energy consumptio...

With the rapid development of Additive Manufacturing (AM) technology in the past 30 years, AM has been shifting from prototyping to advanced manufacturing of functional components in industry. Intellectualization and industrialization of AM process and equipment could be the bottlenecks to the wide industrial applications of AM technology in the fu...

High-throughput calculations/simulations are the prerequisite for the efficient design of high-performance materials. In this paper, a machine learning accelerated distributed task management system (Malac-Distmas) was developed to realize the high-throughput calculations (HTCs) and storage of various data. The machine learning was embedded in Mala...

It is of significance but remains a pivotal challenge to simultaneously enhance the strength and lightweight levels of porous structures. We provide an innovative strategy to improve the strength of porous structures with unchanged lightweight levels by applied composite materials. Selective laser melting (SLM) is convenient for integral forming of...

This paper systematically investigated the effect of solution and artificial aging heat treatments on the microstructural evolution and mechanical properties of TiB/Ti-6Al-4V composites in situ fabricated by selective laser melting. The results showed that the fully martensite microstructure with TiB clusters of the as-built samples was transformed...

Mechanical metamaterials, consisted of periodic arrangements of struts, exhibit excellent specific mechanical properties (kN•m/kg) and are of importance for aerospace applications, lightweight construction, bone implants, and energy absorption. However, current mechanical metamaterials are still falling far behind many biological architectures. On...

The dynamics of the reinforced particles' migration remains unclear during the rapid non-equilibrium laser powder bed fusion (LPBF) process. Conducting real-time observations to obtain a comprehensive understanding of the reinforcements' movement is challenging due to the complex physical phenomena that occur during experimentation. The proposed nu...

Additive manufacturing is expected to transform and upgrade the traditional foundry industry to realize the integrated manufacturing and rapid and low-cost development of high-performance components with complex shapes. The additive manufacturing technology commonly applied in casting mold preparation (fusible molds, sand molds/cores and ceramic co...

The concept of metamaterials originates from the proposal of left-hand materials with negative refractive index, followed by which, varieties of metamaterials with kinds of fantastic properties that cannot be found in natural materials, such as zero/negative Poisson’s ratio, electromagnetic/acoustic/thermal cloaking effect, etc., were come up with....

It is one of the future trends to create materials in situ by laser additive manufacturing. AlSi7Mg/nano-SiCp composites were successfully in situ prepared by selective laser melting in our previous study. After adding 2 wt% nano-SiC particles, the tensile stress and strain increased to 502.94 ± 6.40 MPa and 10.64 ± 1.06%, respectively. For the fir...

Al7075 alloy is a typical aviation aluminum with good mechanical properties and anodic oxidation effect. Laser engineered net shaping technology has unique advantages in the integrated forming of high-performance large aircraft structural parts. The manufacturing of 7075 aluminum alloy structural parts by laser engineered net shaping technology has...

NiTi shape memory alloy (SMA) with nominal composition of Ni 50.8 at% and Ti 49.2 at% was additively manufactured (AM) by selective laser melting (SLM) and laser directed energy deposition (DED) for a comparison study, with emphasis on its phase composition, microstructure, mechanical property and deformation mechanism. The results show that the yi...

At present, the design of bone scaffolds cannot well balance the combination of suitable porosity and proper mechanical property, leading to difficultly facilitate bone tissue regeneration and avoid the stress shielding phenomenon simultaneously. In this work, a topology strategy of designing double-cone struts to reduce stress shielding of diamond...

This chapter introduces the preparation methods for metals and metal matrix composites, highlighting the many technological challenges as well as the differences between traditional methods and additive manufacturing (AM). As an emerging manufacturing technology, AM offers many advantages over traditional methods. This chapter briefly introduces th...

This chapter introduces the microstructure and mechanical properties of typical metal materials like iron-based alloy, titanium-based alloy, aluminum alloy, and nickel-based alloy prepared by SLM, and studies Ti-6Al-4V metallic metamaterials, such as pentamode material (PM) structure. First, it analyzes and compares the formation law of melt pool m...

This chapter introduces the conventional characterization methods used in SLM preparation of metal matrix composites, mainly metal powder raw material characterization, microstructure characterization, and mechanical properties characterization. First of all, the most important testing indexes for the powder before forming are particle size distrib...

This chapter introduces the posttreatment methods for SLM-formed metal parts. During the processing of metals and their composites by SLM, some problems, including evaporation, oxidation, spheroidization, and stress concentration, can result in rough surfaces, cracking, and serious performance degradation. In this case, posttreatment methods such a...

This chapter introduces the research status of iron-based, titanium-based, aluminum-based, and nickel-based composites and previews their future research directions. Metal matrix composites have been widely used in aerospace, aviation and other high-tech fields for their high specific strength, specific stiffness, and excellent high-temperature cha...

This chapter introduces the application of metal matrix composites in the fields of aerospace, biomedical, and mold technology. Metal matrix composites, such as titanium and aluminum alloy composites, are widely used in aerospace as key components, such as turbine disks and impellers, for their lightweight and high-strength characteristics. The met...

This chapter introduces the preparation of metal matrix composites by SLM, including the preparation technology and process of Fe-based, Ti-based, Al-based, and other metal matrix composites, and further prepared gradient materials. Fe-based composites mainly involve SiC, Cr3C2, TiN, hydroxyapatite (HA), FeCoCrMoCBY, and TiB2 as reinforcing phases....

This chapter introduces the metallurgical mechanism and physical characteristics of selective laser melting (SLM), a process in which a high-energy laser acts on metal powders that melt to form a tiny molten pool and then solidify again. When the laser acts on metal powders, such complex physicochemical phenomena as absorption and scattering of las...

A novel crack-free Ti-modified Al-Cu-Mg alloy for SLM was developed here, based on the thermodynamic calculations of the crack susceptibility index and growth-restriction factor. We found that the introduction of Ti into the Al-Cu-Mg alloy effectively promoted the grain refinement and columnar-to-equiaxed grain transition as a result of the heterog...

The lattice structure with graded composition and microstructure in function of position, allowing for smooth transition and combination of multiple desirable features, has great prospects in various applications. Laser powder bed fusion (LPBF) is an effective approach to preparing the gradient-material lattice structure by altering the proportion...

In this study, the level set-based topology optimization method was adopted to design novel lattice structures. The Ti-6Al-4V topology-optimized lattice structures with 30 % volume of solid materials were successfully fabricated by selective laser melting (SLM). The study on mechanical properties and energy absorption capability of the topology-opt...

About 3 mm thick five-element equimolar high-entropy alloy (HEA) FeCoCrNiMn was successfully deposited by solid-state cold spraying (CS). The high-temperature oxidation behavior of the CSed HEA was investigated at 700-900 °C. Heat treatment was performed on the CSed HEA before oxidation to heal the incomplete interfaces between the deposited partic...

Bionics is the inspiration resource of state-of-the-art science and technique. The chameleon can capture prey by great distances with the assistance of its highly stretchable and ballistic tongue. Inspired by this biological teacher, here we demonstrate the fabrication of flexible electromagnetic manipulators. As-prepared flexible electromagnetic m...

Cu-based shape memory alloys are promising materials for functional or intelligent applications because of its good shape memory properties and low cost. As an additive manufacturing technique, selective laser melting (SLM) is easy to produce such complex intelligent components, moreover, the rapid solidification rate can obtain fine microstructure...

Porous metallic biomaterials developed from pentamode metamaterials (PMs) were rationally designed to mimic the topological, mechanical, and mass transport properties of human bones. Here, a series of diamond-based PMs with different strut parameters were fabricated from a Ti-6Al-4V powder by selective laser melting (SLM) technique. The morphologic...

p>Triply Periodic Minimal Surface (TPMS) porous structures are recognized as the most promising bionic artificial structures for tissue engineering. The fatigue properties of additive manufactured porous structures are essential for long-term use in a dynamical bio-skeletal environment. The aim of this study is to study the compression–compression...

Metamaterials have been receiving an increasing amount of interest in recent years. As a type of metamaterial, pentamode materials (PMs) approximate the elastic properties of liquids. In this study, a finite-element analysis was conducted to predict the mechanical properties of PM structures by altering the thin wall thicknesses and layer numbers t...

The influence of the microstructure on mechanical properties of AlSi10Mg fabricated by casting and selective laser melting (SLM) were investigated and contrasted in this work, with an emphasis on understanding the forming mechanism. The microstructure, phase structure and mechanical properties were characterized by scanning electron microscopy/fiel...

Triply Periodic Minimal Surface (TPMS) porous structures are recognized as the most promising bionic artificial structures for tissue engineering. The fatigue properties of additive manufactured porous structures are essential for long-term use in a dynamical bio-skeletal environment. The aim of this study is to study the compression-compression fa...

The anti-corrosion behaviors of SLM-processed 316L stainless steel (SLMed-SS) with amorphous alloy additive (SLMed-composite) have been investigated, where the pitting of SLMed-composite is easy to be suppressed compared to that of SLMed-SS particularly once the pitting occurred. In addition, the pitting incubation time of SLMed-composite is confir...

For additively manufactured components, it’s widely accepted to have high enough energy input to facilitate nearly full density and low enough energy input to avoid cracking tendency. In this work, ultrahigh-performance Ti50.6Ni49.4 (at.%) shape memory alloy (SMA) was manufactured by selective laser melting (SLM) under high enough energy inputs (15...

AlSi7Mg is one of the most widely used aluminum alloys. However, its moderate strength limits its use as a structural material for critical parts. Most mechanisms used to strengthen the material sacrifice its ductility. In situ reactions during the selective laser melting (SLM) process rectify the trade-off by introducing dislocations around the su...

In this work, the structural design of mimicking the fluids, the morphological characteristics, stress distributions predicted by finite element (FE) method, mechanical properties and deformation mechanisms of pentamode materials (PMs) were systematically investigated. We proposed a two-steps optimization strategy to rationally design PM structures...

High-entropy alloys are of great interest due to their unique phase structure. They are constructed with five or more principal alloying elements in equimolar or near-equimolar ratios and thus derive their performance from multiple elements rather than one. In this work, solid-state cold spraying is used for the first time to produce a FeCoNiCrMn h...

The Cu-13.5Al-4Ni-0.5Ti copper-based shape memory alloys (SMAs) were fabricated by selective laser melting (SLM). The parameters were optimized to obtain almost fully dense copper-based SMAs samples. The phases and microstructures were characterized and the tensile properties at room temperature and 200 °C were evaluated. The XRD results showed tha...

Ag/SnO2, as a promising and environment-friendly electrical contact material, is widely applied in low-voltage apparatus. But the properties of Ag/SnO2 composites is difficult to improve due to the poor distribution phases and difficult component design. In this work, the Ag/SnO2 composites are prepared by selective laser melting. To get better per...