Additive manufacturing最新文献_第9页

A new temperature index for build orientation optimization in powder bed fusion additive manufacturing

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-05 DOI: 10.1016/j.addma.2025.104660

A. González, R. Barea, S. Corbera

{"title":"A new temperature index for build orientation optimization in powder bed fusion additive manufacturing","authors":"A. González, R. Barea, S. Corbera","doi":"10.1016/j.addma.2025.104660","DOIUrl":"10.1016/j.addma.2025.104660","url":null,"abstract":"<div><div>In Additive Manufacturing (AM) technology, part orientation holds a significant influence on various aspects including manufacturing time, support requirements and thermo-mechanical properties. The research specifically examines the crucial role of temperature in determining metallic part orientation for AM. With the aim of optimizing part orientation while temperatures are minimized even so, we introduced a novel thermal index. This index is able to quantify temperature changes upon rotating the part and comprises multiple sub-indices (area ground, circle, height and angle) derived from geometrical information extracted from STL (Standard Triangle Language) files. In order to assess the effectiveness of the thermal index, a combination of finite element method (FEM) and genetic algorithm (GA) techniques to solve the orientation problem is here performed. In this frame, a 360° rotation of the part for comparative analysis was conducted between the solutions obtained from the thermal index and those from FEM simulations. This contribution comprises two cases studies: a cone and a sand clock. The obtained results demonstrate a correlation between the thermal index and FEM-calculated temperature during the AM process. Notably, the highest thermal index (1.8 for the cone and 2.0 for the sand clock) corresponds to the lowest part temperatures (54°C for the cone and 53°C for the sand clock). Due to the simplifications of using this index, the time required to locate the part was significantly reduced by 96 % for the cone (to 4 minutes) and by 53 % for the sand clock (to 21 minutes) compared to the FEM. Furthermore, we validated the thermal index solving the part orientation problem for an industrial part and a foot orthosis.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"99 ","pages":"Article 104660"},"PeriodicalIF":10.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile construction of intelligent flexible double layer honeycomb sandwich structure for tunable microwave absorption by 4D printing

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-05 DOI: 10.1016/j.addma.2025.104661

Wei Xiao , Shaoqi Shi , Pei Liu , Zhilei Hao , Zhaoxia Tian , Qingqing Gao , Kai Xu , Yinxu Ni , Jin Chen , Changtian Zhu , Zhixiang Li , Gaojie Xu , Hui Zhang , Fenghua Liu

{"title":"Facile construction of intelligent flexible double layer honeycomb sandwich structure for tunable microwave absorption by 4D printing","authors":"Wei Xiao , Shaoqi Shi , Pei Liu , Zhilei Hao , Zhaoxia Tian , Qingqing Gao , Kai Xu , Yinxu Ni , Jin Chen , Changtian Zhu , Zhixiang Li , Gaojie Xu , Hui Zhang , Fenghua Liu","doi":"10.1016/j.addma.2025.104661","DOIUrl":"10.1016/j.addma.2025.104661","url":null,"abstract":"<div><div>The integration of structure and material can endow microwave absorbers with excellent performance and broad application fields. However, its integrative manufacturing is extremely challenging, especially for the integration of functional materials and intelligent structures. In this context, the liquid crystal display (LCD) 4D printing was used to construct a kind of intelligent flexible double layer honeycomb sandwich structure by integrating multifunctional MXene@flake carbonyl iron powder (FCIP) and shape memory polymers (SMPs) resin. By controlling the applied time of the magnetic field, the structure with shape memory effect (SME) will be recovered to different radius of curvature (<em>R</em>) and center angle (<em>α</em>), which can endow the device with different absorption strengths and effective absorption bandwidth (EAB). When the <em>α</em> and <em>R</em> of the structure are 65.2° and 16.7 cm, the minimum reflection loss (<em>RL</em><sub><em>min</em></sub>) measured by the bow method is −50.87 dB, and the EAB (<em>RL</em> < −10 dB) reaches 13.8 GHz covering the C, X, and Ku bands. In addition, the applicability of smart structure devices in stealth technology is further confirmed by radar cross section (RCS) simulation, which is consistent with the conclusion of the measured results. This work enables the potential for rapid manufacturing of an intelligent, flexible, and ultra-broadband strong microwave absorbing device with integrated structure and function by 4D printing, which can be used in smart anti electronic reconnaissance, flexible wearable devices, and stealth technology.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"99 ","pages":"Article 104661"},"PeriodicalIF":10.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Localized strengthening of triply periodic minimal surface lattice structures via tuning the internal material distribution at the grain level

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-05 DOI: 10.1016/j.addma.2025.104663

Dien Hu , Jianying Wang , Zhirong Liao , M.W. Fu

{"title":"Localized strengthening of triply periodic minimal surface lattice structures via tuning the internal material distribution at the grain level","authors":"Dien Hu , Jianying Wang , Zhirong Liao , M.W. Fu","doi":"10.1016/j.addma.2025.104663","DOIUrl":"10.1016/j.addma.2025.104663","url":null,"abstract":"<div><div>Grain coarsening delivers the potential to enhance the multifunctional performances of triply periodic minimal surface (TPMS) structures, such as thermal and electrical conductivity, but it usually results in a weakening effect on the strength of the components. In this research, an abnormal phenomenon of coarse grains and slender walls-induced mechanical strengthening behavior was observed in the stainless steel 316 L TPMS structures fabricated via micro-laser powder bed fusion (μLPBF). The results indicate that a homogenized internal material distribution at the grain level leads to obvious localized strengthening behaviors in the TPMS structures during the localized and densification stage in the compression process. As the grains become coarser or the walls become thinner, the deformation mode of the TPMS structures transforms from the localized collapse deformation to the localized coordinated deformation, in which a homogeneous internal grain distribution is triggered by grain coarsening and wall thinning, promoting a homogeneous stress distribution. Particularly, Diamond (D)-type structures with the middle grains of 25.7 μm in the deformation direction show a 2.32 % enhancement in the energy absorption capacity compared to that of fine-grained (20.2 μm) components. This research outlines a guideline for acquiring an excellent synergy of the mechanical properties and multifunctional performances of the TPMS structures.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"99 ","pages":"Article 104663"},"PeriodicalIF":10.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of architecture and temperature on the critical strain for serrated flow in additively manufactured Inconel 718 lattices

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-05 DOI: 10.1016/j.addma.2025.104676

S. Sahoo , Z. Chen , X. Jin , D. Mordehai , M. Haranczyk , M.T. Pérez-Prado

{"title":"Influence of architecture and temperature on the critical strain for serrated flow in additively manufactured Inconel 718 lattices","authors":"S. Sahoo , Z. Chen , X. Jin , D. Mordehai , M. Haranczyk , M.T. Pérez-Prado","doi":"10.1016/j.addma.2025.104676","DOIUrl":"10.1016/j.addma.2025.104676","url":null,"abstract":"<div><div>This work aims to investigate the influence of architecture and testing temperature (T) on the critical strain for serrated flow (ε<sub>c</sub>) in Inconel 718 additively manufactured lattices. Three BCC lattices with different strut and cell dimensions were fabricated by laser powder bed fusion (LPBF) and they were tested in uniaxial compression at 25, 300, 450 and 600°C at an initial strain rate of 10<sup>−3</sup> s<sup>−1</sup>. Serrated flow was observed in the three BCC lattices at T ≥ 300 °C and ε<sub>c</sub> was measured for each lattice architecture and temperature. At a fixed T ε<sub>c</sub> is inversely proportional to the lattice relative density and for each investigated lattice architecture ε<sub>c</sub> exhibits the lowest value at 450°C. Finite element modeling (FEM) was utilized to calculate the local stress distributions during uniaxial compression of the BCC lattices, revealing that the onset of serrated flow requires an activation volume fraction of material (V<sub>f</sub>*) to be subjected to a local stress exceeding a threshold stress (σ<sub>th</sub>). The values of V<sub>f</sub>* and σ<sub>th</sub> at 300, 450 and 600°C were calculated from the FEM simulations of the BCC lattices and they were used to accurately predict ε<sub>c</sub> in an LPBF-manufactured FCCXYZ lattice at similar testing conditions. Our results suggest that the inverse relationship between ε<sub>c</sub> and the lattice relative density is explained by the fact that lighter lattices require higher nominal strains to reach V<sub>f</sub>*. Conversely, the variation of ε<sub>c</sub> with temperature is attributed to changes in V<sub>f</sub>*, as σ<sub>th</sub> remains essentially constant at the investigated temperatures.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"99 ","pages":"Article 104676"},"PeriodicalIF":10.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Audio-visual cross-modality knowledge transfer for machine learning-based in-situ monitoring in laser additive manufacturing

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-05 DOI: 10.1016/j.addma.2025.104692

Jiarui Xie , Mutahar Safdar , Lequn Chen , Seung Ki Moon , Yaoyao Fiona Zhao

{"title":"Audio-visual cross-modality knowledge transfer for machine learning-based in-situ monitoring in laser additive manufacturing","authors":"Jiarui Xie , Mutahar Safdar , Lequn Chen , Seung Ki Moon , Yaoyao Fiona Zhao","doi":"10.1016/j.addma.2025.104692","DOIUrl":"10.1016/j.addma.2025.104692","url":null,"abstract":"<div><div>Various machine learning (ML)-based in-situ monitoring systems have been developed to detect anomalies and defects in laser additive manufacturing (LAM) processes. While multimodal fusion, which integrates data from visual, audio, and other modalities, can improve monitoring performance, it also increases hardware, computational, and operational costs. This paper introduces a cross-modality knowledge transfer (CMKT) methodology for LAM in-situ monitoring, which transfers knowledge from a source modality to a target modality. CMKT enhances the representativeness of the features extracted from the target modality, allowing the removal of source modality sensors during prediction. This paper proposes three CMKT methods: semantic alignment, fully supervised mapping, and semi-supervised mapping. The semantic alignment method establishes a shared encoded space between modalities to facilitate knowledge transfer. It employs a semantic alignment loss to align the distributions of identical groups (e.g., visual and audio defective groups) and a separation loss to distinguish different groups (e.g., visual defective and audio defect-free groups). The two mapping methods transfer knowledge by deriving features from one modality to another using fully supervised and semi-supervised learning approaches. In a case study for LAM in-situ defect detection, the proposed CMKT methods were compared with multimodal audio-visual fusion. The semantic alignment method achieved an accuracy of 98.6 % while removing the audio modality during the prediction phase, which is comparable to the 98.2 % accuracy obtained through multimodal fusion. Using explainable artificial intelligence, we discovered that semantic alignment CMKT can extract more representative features while reducing noise by leveraging the inherent correlations between modalities.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"101 ","pages":"Article 104692"},"PeriodicalIF":10.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

UV-curable, 3D printable, thermally conductive polysiloxane composites for thermal interface devices

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-05 DOI: 10.1016/j.addma.2025.104658

Hao Jin , Xingxing Zhong , Chucheng Zhong , Wensheng Dai , Hongping Xiang , Lanyue Zhang

{"title":"UV-curable, 3D printable, thermally conductive polysiloxane composites for thermal interface devices","authors":"Hao Jin , Xingxing Zhong , Chucheng Zhong , Wensheng Dai , Hongping Xiang , Lanyue Zhang","doi":"10.1016/j.addma.2025.104658","DOIUrl":"10.1016/j.addma.2025.104658","url":null,"abstract":"<div><div>Thermally conductive polysiloxane composites play an important role in 5 G electronics to efficiently dissipate accumulated heat. However, these polysiloxane composites are still challenged by long curing time, high energy consumption and huge amounts of waste from traditional subtractive manufacturing processes. In this work, UV-curable, 3D printable, thermally conductive polysiloxane composites are developed using mercaptopropyl-functionalized polydimethylsiloxane (PDMS-SH) and 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (V<sub>4</sub>) as matrix, and different sized spherical Al<sub>2</sub>O<sub>3</sub> and BN particles as thermally conductive fillers. Using V<sub>4</sub> instead of the common vinyl-terminated polydimethylsiloxane (PDMS-Vi) can greatly reduce the viscosity to fill more fillers (6 wt% BN and 76 wt% Al<sub>2</sub>O<sub>3</sub>) for higher thermal conductivity (2.02 ± 0.02 W/mK). The rational combination of larger particle size BN (200 μm) with different sizes of Al<sub>2</sub>O<sub>3</sub> (5 and 90 μm) has a fast gelation behavior (within 5 s) and low critical exposure energy (3 mJ/cm<sup>2</sup>). Furthermore, the composites developed can be 3D printed into thermally conductive devices with complex 3D structures, and the 3D objects show outstanding heat conduction and dissipation capabilities. Therefore, these UV-curable, 3D printable, thermally conductive polysiloxane composites will be used in 3D thermal interfacial objects with high production efficiency, low energy consumption and customization.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"99 ","pages":"Article 104658"},"PeriodicalIF":10.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel 3D printing scheme for lunar construction with extremely low binder utilization

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-05 DOI: 10.1016/j.addma.2025.104657

Zifan Geng , Zhiwen Wu , Xiangyu Wang , Lizhi Zhang , Wei She , Ming Jen Tan

{"title":"A novel 3D printing scheme for lunar construction with extremely low binder utilization","authors":"Zifan Geng , Zhiwen Wu , Xiangyu Wang , Lizhi Zhang , Wei She , Ming Jen Tan","doi":"10.1016/j.addma.2025.104657","DOIUrl":"10.1016/j.addma.2025.104657","url":null,"abstract":"<div><div>Lunar construction has become a multidisciplinary, cutting-edge, and strategic topic worldwide with additive manufacturing as a key technology to build required structures. Targeting the low strength or excessive terrestrial materials utilization in current lunar 3D printing, a novel printing scheme is proposed herein to balance the processability and strength using minimal binders. A printing system was designed based on powder extrusion and passive roll-pressing. Therein, a screw-blade module with 73 % of full blade length can efficiently extrude dry and damp powders. An adjustable roller-spring module is applied to reveal the significance of harder lunar regolith, larger roller and stiffer spring on the powder printing. Using the roller with 50 mm of diameter and 78 N of pressure, a dense print layer can be obtained with > 2 mm of layer thickness and 2–5 MPa of flexural strength. Through experimental results and mechanical analysis a quantitative powder-roller interaction is established. Also, this printing system supports both premix printing and dry printing. The former can use fewer binders as low as 4 wt%, while the latter enables 2.6 times and 3.8 times higher flexural and bonding strength respectively. This low-binder powder 3D printing scheme will bring more prospects and advancements for future lunar constructions.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"99 ","pages":"Article 104657"},"PeriodicalIF":10.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vat photopolymerization of zirconia suspensions continuously blended by in-line static mixing for strength-gradient zirconia

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-05 DOI: 10.1016/j.addma.2025.104675

Gyu-Nam Kim , Young-Hag Koh

{"title":"Vat photopolymerization of zirconia suspensions continuously blended by in-line static mixing for strength-gradient zirconia","authors":"Gyu-Nam Kim , Young-Hag Koh","doi":"10.1016/j.addma.2025.104675","DOIUrl":"10.1016/j.addma.2025.104675","url":null,"abstract":"<div><div>Vat photopolymerization (VP) of ceramics has demonstrated great promises for manufacturing dental crowns made of partially stabilized zirconia (PSZ) ceramics with excellent dimensional accuracy, outstanding mechanical properties, and good esthetics. However, close mimicking of gradually changing optical translucency of natural teeth still remains challenging. We herein propose functionally graded (FG)-digital light processing (DLP) for manufacturing PSZ objects with gradually varying compositions and mechanical/optical properties using an in-line static mixing system. In this study, 4 mol% and 5 mol% yttria (Y<sub>2</sub>O<sub>3</sub>) PSZ, denoted as “4Y-PSZ and 5Y-PSZ”, respectively, were employed as models due to their different mechanical strengths and optical transmittances. Predetermined amounts of 4Y-PSZ and 5Y-PSZ suspensions were fed individually into an in-line static mixer using computer-controlled extrusion systems. This FG-DLP process enabled construction of five gradients with varying 4Y-PSZ/5Y-PSZ compositions (5Y-PSZ content = 0 vol%, 25 vol%, 50 vol%, 75 vol%, and 100 vol%). For uniform blending, as-received 4Y-PSZ and 5Y-PSZ granules were calcined at 1000 °C for 1 h and then crushed into fine particles by ball-milling. In addition, UV curing time for different gradients were optimized individually due to different photopolymerization behaviors of 4Y-PSZ and 5Y-PSZ suspensions. After sintering at 1500 °C for 2 h, all gradients were almost fully densified and strongly bonded together. When the content of 5Y-PSZ increased from 0 vol% to 100 vol%, flexural strength decreased from 865 ± 80 MPa to 613 ± 56 MPa and optical % transmittance increased remarkably from 24.1 ± 0.4 % to 31.9 ± 0.3 %.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"99 ","pages":"Article 104675"},"PeriodicalIF":10.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Additive manufacturing of γ' precipitate-strengthened nickel-based superalloy UNS N07001 by electron beam melting: Effects of post-heat treatment on microstructure and mechanical properties

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-04 DOI: 10.1016/j.addma.2025.104690

Ryo Takakuwa , Motoki Sakaguchi , Yuante Chin , Hiroaki Nakamoto , Manabu Noguchi , Hirotsugu Inoue

{"title":"Additive manufacturing of γ' precipitate-strengthened nickel-based superalloy UNS N07001 by electron beam melting: Effects of post-heat treatment on microstructure and mechanical properties","authors":"Ryo Takakuwa , Motoki Sakaguchi , Yuante Chin , Hiroaki Nakamoto , Manabu Noguchi , Hirotsugu Inoue","doi":"10.1016/j.addma.2025.104690","DOIUrl":"10.1016/j.addma.2025.104690","url":null,"abstract":"<div><div>The γ' precipitate-strengthened nickel-based superalloy UNS N07001 is widely used in gas turbines because of its high-temperature strength and corrosion resistance. In this paper, optimal process parameters of electron beam melting were determined to shorten the lead time of UNS N07001. In addition, the effects of post-heat treatment on the microstructure and mechanical properties of UNS N07001 were evaluated. The optimal process parameters were determined by evaluating the appearance, surface roughness, relative density, and Brinell hardness of UNS N07001 blocks built with 32 different parameter combinations. The UNS N07001 sample produced using the optimal parameters was subjected to hot isotropic pressing (HIP) and solution treatment and aging (STA). Microstructural observation, precipitate analysis, and tensile tests of the resulting specimens were conducted. Microstructural observations and precipitate analysis revealed that the as-built specimen contained cracks and pores. These defects disappeared after HIP treatment. Additionally, STA after HIP treatment resulted in a high content of fine γ'-phase precipitate. Tensile tests revealed that the mechanical properties of the specimen were barely changed by HIP treatment, whereas STA after HIP markedly improved the mechanical properties of the specimen to a level comparable to the requirements for the wrought material. The beneficial mechanical properties of the specimen treated by HIP and STA may be attributed to the high content of fine γ' precipitates.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"100 ","pages":"Article 104690"},"PeriodicalIF":10.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143270072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical improvement of basalt fiber reinforced cementitious material for binder jetting 3D printing

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-02-04 DOI: 10.1016/j.addma.2025.104688

Guowei Ma , Chaoyu Dou , Li Wang , Fang Wang , Zhijian Li

{"title":"Mechanical improvement of basalt fiber reinforced cementitious material for binder jetting 3D printing","authors":"Guowei Ma , Chaoyu Dou , Li Wang , Fang Wang , Zhijian Li","doi":"10.1016/j.addma.2025.104688","DOIUrl":"10.1016/j.addma.2025.104688","url":null,"abstract":"<div><div>Binder jetting 3D printing (BJ3DP) of cementitious material exhibits remarkable dexterity in printing complex or customer-tailored architectural components due to the support of powder. The length distribution and content of basalt fibers are optimized to achieve uniform dispersion of long fibers in cement powder and the synergy between printability and mechanical enhancement of composite materials. A high-speed mixer is used to break and disperse fibers into cement powder. Effect of working parameters, such as the mixing time, original fiber length and content, on printability and mechanical properties are exploited. Different post-processing methods are attempted to enhance the strength of the printed specimens. The successful printing of highly complex hollow thin-wall structures demonstrates the dexterity and high accuracy of BJ3DP using fiber reinforced cementitious materials. Test results show that higher fiber content and fiber length tend to negate spreadability of powders and the dimensional accuracy of printed specimens. The directional alignment of fibers is more remarkable for longer fibers. The printed specimens with 12 mm fibers (1.5 %) show maximum flexural strength of 13.52 MPa, which is 62.5 % higher than non-reinforced control specimens. The basalt fiber-reinforced specimens show obvious anisotropy in compressive strength and ultrasonic wave velocity due to basalt fiber orientation. The post-processing method of SiO<sub>2</sub> particles in silica sol impregnation adhere each other and fill voids in the matrix and result in a denser material, thus effectively enhancing the flexural and compressive strengths to 14.27 MPa and 37.67 MPa, respectively.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"100 ","pages":"Article 104688"},"PeriodicalIF":10.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0