Additive manufacturing letters最新文献_第9页

Superior mechanical properties of a high temperature Co-based superalloy fabricated by laser powder bed fusion 激光粉末床熔合制备的高温钴基高温合金具有优异的力学性能

IF 4.7

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-07-28 DOI: 10.1016/j.addlet.2025.100311

Liuhao Miao , Huiliang Wei , Jiashun Yue , Rong Chen , Yuanhong Qian , Xiaopeng Li , Zhiguang Zhu , Tingting Liu , Wenhe Liao

{"title":"Superior mechanical properties of a high temperature Co-based superalloy fabricated by laser powder bed fusion","authors":"Liuhao Miao , Huiliang Wei , Jiashun Yue , Rong Chen , Yuanhong Qian , Xiaopeng Li , Zhiguang Zhu , Tingting Liu , Wenhe Liao","doi":"10.1016/j.addlet.2025.100311","DOIUrl":"10.1016/j.addlet.2025.100311","url":null,"abstract":"<div><div>Laser powder bed fusion (LPBF) of high temperature superalloys with superior mechanical properties are highly desired. However, the correlations between the process, microstructure and ambient/high temperature mechanical properties for the typical Co-based superalloy Haynes 188 remain unclear. In this work, the process development, the ambient and high temperature mechanical properties for LPBF of Haynes 188 were systematically explored. Samples with relative density over 99.9 % were achieved. Unprecedented ambient temperature strength-ductility were obtained, with yield strength of 756 MPa, tensile strength of 1067 MPa, and elongation of 60.2 %, respectively. Moreover, high temperature mechanical properties such as the steady-state creep rate of 1.04×10<sup>−4</sup> s⁻¹ at 750 °C and 270 MPa were firstly reported. Additionally, the yield strength of Haynes 188 at 980 °C reached 276 MPa. Microstructural analysis revealed that nano-scale M<sub>6</sub>C/M<sub>23</sub>C<sub>6</sub> carbides pinned dislocations, while dense dislocation networks and refined sub-grains suppressed dynamic recovery. The obtained achievements can provide valuable insights for additive manufacturing of complex and high-performance Haynes 188 components.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100311"},"PeriodicalIF":4.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144770757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new approach to laser DED as a repair technology with laser mesh deposition 用激光网状沉积技术修复激光DED的新方法

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-07-11 DOI: 10.1016/j.addlet.2025.100301

Thomas Girerd , Richard Adamson , Andres Gameros , Marco Simonelli , Andy Norton , Adam Thomas Clare

{"title":"A new approach to laser DED as a repair technology with laser mesh deposition","authors":"Thomas Girerd , Richard Adamson , Andres Gameros , Marco Simonelli , Andy Norton , Adam Thomas Clare","doi":"10.1016/j.addlet.2025.100301","DOIUrl":"10.1016/j.addlet.2025.100301","url":null,"abstract":"<div><div>Controlling the heat input and exploring alternate feedstocks for DED is necessary to improve the versatility of DED as a repair technique. In this research, a new DED method using metallic mesh feedstocks and laser beam oscillations. This method is shown to have good stability, repeatability and good bonding with the substrate comparable to other DED processes. The best depositions show a dilution above 40 % and a height of >1.2 mm. The deposits show similar results to wire DED and powder DED with low dilution levels producing dense clads with no large pores and some grain refinements at the edges of the tracks. This then manifests as a potentially viable repair process with the advantage of a more flexible material input facilitating the delivering of the feedstock material for hard to access repair operations.</div><div>Furthermore, this process has shown its capability to be used with various energy profiles and mesh density paving the way for a better control of the microstructure for complex repair operations. This new DED alternative method has shown its capability to run efficiently with various scan strategies and feedstocks. Hence, laser mesh deposition could be used to deposit material on inhomogeneous surfaces by using carefully designed scanning strategies and mesh density during the process increasing the repair capabilities of DED.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100301"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-matrix interface strength of 3D printed continuous carbon fiber reinforced composites: Quantitative assessment methodology and critical influencing factors 3D打印连续碳纤维增强复合材料双基体界面强度：定量评估方法及关键影响因素

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-07-14 DOI: 10.1016/j.addlet.2025.100303

Xiaofei Lou , Lei Dong , Xin'an Tang , Xiaohui Nan , Teng Zhang , Li Zhao

{"title":"Dual-matrix interface strength of 3D printed continuous carbon fiber reinforced composites: Quantitative assessment methodology and critical influencing factors","authors":"Xiaofei Lou , Lei Dong , Xin'an Tang , Xiaohui Nan , Teng Zhang , Li Zhao","doi":"10.1016/j.addlet.2025.100303","DOIUrl":"10.1016/j.addlet.2025.100303","url":null,"abstract":"<div><div>In 3D printed continuous carbon fiber reinforced dual-matrix composites, the resin matrix in the carbon fiber prepreg filament is not the same with the matrix in the composite, and the dual-matrix interface plays an important role on the mechanical properties of structures. In this paper, a method for testing the interface shear strength (IFSS) of the dual-matrix is proposed. The interfaces between carbon fiber reinforced polyamide-6 prepreg filament and different polylactic acid matrices are selected, and the strengths of the dual-matrix interface are investigated under different printing temperatures, printing speeds, layer thicknesses, and prepreg filament volume fractions. The results show that the polylactic acid matrix with lower crystallinity is capable to form stronger interface with the polyamide-6 material. The printing temperature and printing speed need to be controlled within a certain range to ensure a reasonable viscosity range and printing quality, which will achieve a higher dual-matrix IFSS. The increase of prepreg filament volume fraction and the decrease of layer thickness are conducive to the improvement of dual-matrix interfacial properties. In addition, finite element analysis based on the cohesive model is used to analyze the interface debonding behavior, which validates the test method proposed in this paper.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100303"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Columnar-to-equiaxed transitions in additively manufactured face-centered cubic multi-principal element alloys 增材制造面心立方多主元素合金的柱向等轴转变

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-04-14 DOI: 10.1016/j.addlet.2025.100283

Mengyao Zheng , Yu Liao , Zheng Zhou , Hao Zhang , Chuanwei Li , Zhong Long , Jianfeng Gu

{"title":"Columnar-to-equiaxed transitions in additively manufactured face-centered cubic multi-principal element alloys","authors":"Mengyao Zheng , Yu Liao , Zheng Zhou , Hao Zhang , Chuanwei Li , Zhong Long , Jianfeng Gu","doi":"10.1016/j.addlet.2025.100283","DOIUrl":"10.1016/j.addlet.2025.100283","url":null,"abstract":"<div><div>Columnar-to-equiaxed transition (CET) represents a critical microstructural characteristic in additively manufactured alloys. Precise control over CET is essential for achieving high-performance metallic components through additive manufacturing. In this study, two face-centered cubic multi-principal element alloys (MPEAs), namely CoCrNi and FeCoCrNi, were fabricated via laser directed energy deposition. The influence of process parameter and alloy composition on the CET of the two MPEAs was investigated. The results demonstrated that pronounced CET phenomena were observed in both MPEAs as the laser power increased and the scanning speed decreased. However, significant variations were noted in their CET parameters, equiaxed grain fraction, and crystallographic texture. Subsequently, the impact of process parameters on temperature gradient, solidification rate, and molten pool morphology was investigated via finite element modelling, revealing the formation mechanisms of the grain morphology and texture in additively manufactured CoCrNi and FeCoCrNi alloys. Additionally, the results of thermodynamic calculation revealed significant differences in the growth restriction factors between the two MPEAs, thereby explaining the distinct CET behaviors observed in the two MPEAs.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100283"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cross-modality transfer for DED-LB/M: AI-based prediction of schlieren phenomena from coaxial imaging d - lb /M的跨模态转移：基于人工智能的同轴成像纹影现象预测

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-06-25 DOI: 10.1016/j.addlet.2025.100298

Benedikt Brandau , João Sousa , Rico Hemschik , Frank Brueckner , Alexander F.H. Kaplan

{"title":"Cross-modality transfer for DED-LB/M: AI-based prediction of schlieren phenomena from coaxial imaging","authors":"Benedikt Brandau , João Sousa , Rico Hemschik , Frank Brueckner , Alexander F.H. Kaplan","doi":"10.1016/j.addlet.2025.100298","DOIUrl":"10.1016/j.addlet.2025.100298","url":null,"abstract":"<div><div>Real-time process monitoring is essential for ensuring stability and defect control in directed energy deposition - laser beam/metal (DED-LB/M). Schlieren imaging has proven to be a valuable tool for detecting refractive index variations in the process zone, providing insights into gas flow behaviour, shielding gas efficiency and process plume dynamics. However, schlieren imaging typically requires specialized optical setups, making integration into industrial systems challenging. This study explores an artificial intelligence-driven cross-modality transfer approach that enables the prediction of schlieren-induced refractive index variations from coaxial imaging data, eliminating the need for a dedicated schlieren setup. A background-oriented schlieren system was used to capture reference data, while a coaxial camera recorded the melt pool and surrounding process zone during DED-LB/M. A machine learning model was trained on the combined dataset, establishing correlations between schlieren activity and intensity variations in the coaxial images. The model successfully predicted schlieren-induced disturbances, allowing for the indirect detection of gas flow instabilities and shielding gas deficiencies. The results demonstrate that artificial intelligence-based analysis of coaxial imaging can provide schlieren-equivalent process information, making it possible to monitor refractive index variations, detect process deviations and improve defect prediction in real time. This approach enhances process monitoring capabilities in DED-LB/M, enabling cost-effective, scalable and easily integrable monitoring solutions for industrial applications.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100298"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chamfer distance for non-linear registration of Triply Periodic Minimal Surface lattices 三周期极小曲面格非线性配准的倒角距离

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-07-14 DOI: 10.1016/j.addlet.2025.100299

Michela Lapenna , Francesco Faglioni , Keerthana Chand , Bardia Hejazi , Rita Fioresi , Giovanni Bruno

引用次数: 0

Part distortion monitoring in additive manufacturing using machining 增材制造中零件变形监测

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-06-06 DOI: 10.1016/j.addlet.2025.100295

Jaydeep Karandikar , Akash Tiwari , Josh Harbin , Christopher Tyler , Scott Smith , Derril Vezina , Rob Caron

{"title":"Part distortion monitoring in additive manufacturing using machining","authors":"Jaydeep Karandikar , Akash Tiwari , Josh Harbin , Christopher Tyler , Scott Smith , Derril Vezina , Rob Caron","doi":"10.1016/j.addlet.2025.100295","DOIUrl":"10.1016/j.addlet.2025.100295","url":null,"abstract":"<div><div>In additive manufacturing, accumulation of residual stresses can result in severe part distortion from the desired preform shape. Current methods for in-situ part distortion monitoring in additive manufacturing typically require expensive sensors, or capital equipment, and require time-consuming post-processing to understand the shape deviation. This paper presents an in-situ method, in the context of hybrid manufacturing, for part distortion detection using machining of additively manufactured parts. As a surrogate, three test artifacts were used to represent different distorted geometries. The tool axis positions from the machine tool controller and the cutting power were monitored during a facing operation. Cutting power data was used to detect the tool entry and exit in the workpiece using a novel approach with power standard deviation metric. The workpiece geometry and distorted configuration was subsequently predicted for positional and rotational deviations to within 2 mm accuracy using synchronized tool position data with cutting power. The proposed method can be used in a hybrid (additive and subtractive) machine tool to periodically check part distortion in the additive build. The method is applicable for any additive process and is low-cost and computationally inexpensive.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100295"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved corrosion resistance of selective laser melted NiTi alloys via nanosecond pulsed laser annealing treatment for biomedical application 生物医学用纳秒脉冲激光退火提高选择性激光熔化NiTi合金的耐蚀性

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-07-15 DOI: 10.1016/j.addlet.2025.100306

Chao Yang , Tao Long , An Yan , Hongwei Ma , Haizhou Lu , Liang Liang , Weisi Cai

{"title":"Improved corrosion resistance of selective laser melted NiTi alloys via nanosecond pulsed laser annealing treatment for biomedical application","authors":"Chao Yang , Tao Long , An Yan , Hongwei Ma , Haizhou Lu , Liang Liang , Weisi Cai","doi":"10.1016/j.addlet.2025.100306","DOIUrl":"10.1016/j.addlet.2025.100306","url":null,"abstract":"<div><div>NiTi alloys, known for their excellent biocompatibility, have broad application prospects in the biomedical field, making surface quality and corrosion resistance critical for practical applications. This study employs nanosecond pulsed laser annealing to improve the surface properties of NiTi alloys fabricated by selective laser melting (SLM). The results show that laser annealing significantly reduces surface roughness, with the average roughness (Ra) decreasing from 8.76 µm to 1.42 µm. Meanwhile, potential dynamic polarization analysis conducted at 37 °C in Hank’s solution indicates that laser annealing effectively enhances corrosion resistance, with the corrosion potential shifting positively from -0.68 V to -0.23 V and the corrosion current density decreasing from 3.580 μA·cm⁻² to 0.151 μA·cm⁻². This improvement is attributed to the reduction in surface roughness, grain refinement, and the formation of a more stable oxide layer through laser annealing. This study not only validates the potential of laser annealing for surface modification of SLMed NiTi alloys but also provides valuable insights for their further optimization in biomedical applications.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100306"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel high specific-strength multi-topology Al-Ni-Ti-Zr-Mn alloy using laser powder bed fusion additive manufacturing 采用激光粉末床熔融增材制造新型高比强度多拓扑Al-Ni-Ti-Zr-Mn合金

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-07-22 DOI: 10.1016/j.addlet.2025.100308

Amit Kumar Singh , Prithvi D. Awasthi , Ankita Roy , Priyanka Agrawal , Aishani Sharma , Anurag Gumaste , Ravi Sankar Haridas , Rajiv S. Mishra

{"title":"Novel high specific-strength multi-topology Al-Ni-Ti-Zr-Mn alloy using laser powder bed fusion additive manufacturing","authors":"Amit Kumar Singh , Prithvi D. Awasthi , Ankita Roy , Priyanka Agrawal , Aishani Sharma , Anurag Gumaste , Ravi Sankar Haridas , Rajiv S. Mishra","doi":"10.1016/j.addlet.2025.100308","DOIUrl":"10.1016/j.addlet.2025.100308","url":null,"abstract":"<div><div>Additive manufacturing has opened a paradigm for the efficient and quick production of lightweight lattice structures showing characteristic high specific strength (strength-to-weight ratios). The current study describes the development of methodology and utilization of high strength Al alloy for building complex lattice using additive manufacturing. Thin plate lattice <1 mm of Al-Ni-Ti-Zr-Mn alloy with wide processing window, achieving an average yield strength of 63.13±3.32 MPa in compression, with 28 % lower density than Ti-6Al-4V demonstrates a successful design of Al-Ni-Ti-Zr-Mn alloys using laser beam powder bed fusion (PBF-LB). The mitigation of cracks within thin plate parallel to the loading axis was achieved through the formation of Al-Al₃Ni eutectic channels, exploiting the rapid solidification of this short-freezing-range alloy. In addition to multi-topology structural design, the enhanced strength is attributed to hierarchical microstructure featuring L1₂ phases, bimodal grain distribution, and solid solution strengthening by Mn. This work establishes a printability-performance synergy of Al-Ni-Ti-Zr-Mn alloy for thin plate complex lattice, advancing the use of metamaterials through PBF-LB.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100308"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multimaterial 3D printing of structured surfaces for increased hydrophobicity of biocomposite materials 用于增加生物复合材料疏水性的结构表面的多材料3D打印

IF 4.2

Additive manufacturing letters Pub Date : 2025-07-01 Epub Date: 2025-05-08 DOI: 10.1016/j.addlet.2025.100286

Kayah St. Germain , Damien Marchand , Laurence Chocinski-Arnault , Hani E. Naguib , Fabienne Touchard

{"title":"Multimaterial 3D printing of structured surfaces for increased hydrophobicity of biocomposite materials","authors":"Kayah St. Germain , Damien Marchand , Laurence Chocinski-Arnault , Hani E. Naguib , Fabienne Touchard","doi":"10.1016/j.addlet.2025.100286","DOIUrl":"10.1016/j.addlet.2025.100286","url":null,"abstract":"<div><div>Material extrusion 3D printing is an up-and-coming additive manufacturing method that is continuously being explored for its many benefits including rapid prototyping, high degree of customizability, and low material waste production, among others. One of the most widely used materials in material extrusion 3D printing is polylactic acid (PLA) due to its ease of printability and bio-origins. Recently, new biofiller reinforced PLA biocomposite filaments have begun being sold commercially, but the introduction of the biofiller creates problems of increased hydrophilicity and hygroscopicity. In this study, a possible solution to this problem was explored by using multimaterial 3D printing to add a thin, structured outer layer to the biocomposite in either pure PLA or TPU. This layer helps limit any external moisture from coming into contact with the underlying biocomposite by creating a barrier with increased hydrophobicity. A grid, triangle, and honeycomb pattern were each tested at 50 %, 75 %, and 100 % pattern densities for each material. It was found that, along with the pattern that was printed, the filament deposition process created additional roughness that influenced the way the water droplets interacted with the surface. All the patterned surfaces displayed a higher water contact angle than when the material was printed in a flat manner. Additionally, factors that influence the feasibility of using this outer structured layer to improve the surface hydrophobicity of biocomposite parts were explored, including material compatibility and adhesion.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"14 ","pages":"Article 100286"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0