Article
Materials Science, Multidisciplinary
Wenlin Ye, Jin Bao, Jie Lei, Yicheng Huang, Zhihao Li, Peisheng Li, Ying Zhang
Summary: A mesoscopic simulation was conducted to study the heat behavior of CP-Ti during selective laser melting, showing significant improvements in maximum temperature, temperature change rate, lifetime of molten pool, and size with the increase of laser power. Moreover, characteristics and heat behavior of the molten pool under double track were mainly investigated, finding higher maximum temperature, lifetime, and dimensions in the second track compared to the first, with a larger length-width ratio as laser power increases.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
J. Karimi, C. Suryanarayana, I Okulov, K. G. Prashanth
Summary: This study investigated the effect of remelting on the microstructure and mechanical properties of Ti6Al4V materials fabricated using selective laser melting. The results showed that the number of remeltings significantly influenced the homogenization of the microstructure and mechanical properties of the materials, with an increase in hardness and ultimate tensile strength but a decrease in ductility observed with a higher number of melting steps.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Sijia Liu, Minsuk Lee, Cheol Choi, Keesam Shin
Summary: In this study, the microstructure, microhardness, and porosity of additive manufactured parts fabricated by selective laser melting are investigated. The porosity of the finished product depends primarily on the energy density used and is more strongly influenced by the scanning speed than the applied laser power. The microstructure exhibits characteristic features attributed to different cooling rates near and far from the laser melting zone.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
Matti Lindroos, Tatu Pinomaa, Atte Antikainen, Juha Lagerbom, Joni Reijonen, Tomi Lindroos, Tom Andersson, Anssi Laukkanen
Summary: The study presents a thermomechanical crystal plasticity model for analyzing microscale evolution and residual stress and strain in a single track event of selective laser melting. The model is effective in addressing material properties and complex performance dependent on microstructure scale phenomena.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Jiapeng Sun, Qisheng Sun, Ying Liu, Bangjun Li, Zheng Zhang, Bingqian Xu, Songsong Xu, Ying Han, Yanxin Qiao, Jing Han, Guosong Wu, Paul K. Chu
Summary: The study investigates the use of ultrasonic severe surface rolling (USSR) to enhance the corrosion resistance of SLM 316L stainless steel, and finds that the USSR processed samples exhibit significant improvement in corrosion resistance, attributed to the unique gradient structure and chemically homogeneous and high-quality surface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Manufacturing
Navid Alinejadian, Pei Wang, Lauri Kollo, Konda Gokuldoss Prashanth
Summary: This study focuses on fabricating dense and near crack-free commercial pure molybdenum samples using selective laser melting (SLM). The use of a double scan strategy helps reduce the formation of solidification cracks.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
B. Rozegari Ghashghay, H. R. Abedi, S. G. Shabestari
Summary: This study investigates the grain refinement in the microstructure of selective laser-melted AlSi10Mg alloy. Randomly oriented grains without preferred micro-texture are observed in the printed microstructure. Columnar grains aligned with the building direction have been formed in the molten pool. Refined equiaxed grains with a size of fewer than 10 mm are formed during solidification or dynamic recrystallization.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
H. Zhang, Y. Wang, J. J. Wang, D. R. Ni, D. Wang, B. L. Xiao, Z. Y. Ma
Summary: This study investigates the issue of inferior mechanical properties along the building direction in additive manufactured aluminum alloys and develops an optimized heat treatment method. The results show that direct aging treatment can retain the fine grain microstructure and promote Si phase precipitation, but it also leads to pore growth. By balancing the refinement of cell structure and pore growth, aging at 130 degrees C is determined to be the optimal treatment, resulting in improved tensile strength and elongation of the samples.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Hyungsoo Lee, Joong Eun Jung, Dong-Soo Kang, Hi Won Jeong, Dae Won Yun, Jungho Choe, Young Soo Yoo, Seong-Moon Seo
Summary: This study investigated the effects of powder reuse on the microstructures and mechanical properties of selective laser melted (SLM) parts. It was found that increased powder reuse led to an increase in average particle size and oxidation of the powder, which in turn affected the recrystallization of the SLMed parts. However, in the case of multiple powder reuses, the increased oxidation contributed to improved mechanical properties of the parts.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Automation & Control Systems
Adelaide Nespoli, Antonio Mattia Grande, Francesca Passaretti, Daniela Rigamonti, Giuseppe Sala, Paolo Bettini
Summary: The study aims to investigate the damping response of a NiTi auxetic structure manufactured through additive manufacturing. Electropolishing is used to improve the surface roughness of the printed samples. The damping capacity of the manufactured auxetic NiTi components is evaluated based on the energy dissipated per cycle and the loss factor index. Results show that electropolishing enhances the damping capacity of the auxetic NiTi cell, surpassing that of traditional materials. The maximum dissipated energy of 55 mJ is registered in the austenite state after 10 minutes of electropolishing, with a maximum loss factor of 0.0523 in the R-phase.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Dengzhi Yao, Xizhong An, Haitao Fu, Hao Zhang, Xiaohong Yang, Qingchuan Zou, Kejun Dong
Summary: This article studied the spreading of 316L stainless steel powder during printing through 3D particulate scale dynamic simulations, identifying factors affecting powder bed quality and optimized conditions such as blade moving speed and particle size. The simulation results showed that optimal conditions lead to a more uniform and denser powder bed.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Karl Peter Davidson, Guy Littlefair, Sarat Singamneni
Summary: This research investigates the use of selective laser melting to convert duplex stainless steels into ferritic forms for better machinability, showing promising results through experimental machining evaluations. Comparisons of metallographic and micro-hardness assessments of laser melted and wrought specimens suggest that this approach can alleviate machinability problems in duplex stainless-steel systems.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Engineering, Manufacturing
Ying Liu, Jiapeng Sun, Yantao Fu, Bingqian Xu, Bangjun Li, Songsong Xu, Peilong Huang, Jianing Cheng, Ying Han, Jing Han, Guosong Wu
Summary: The gradient heterogeneous structure (GHS) architecture is proposed to achieve superior strength and ductility combination in additively manufactured (AM) 316L stainless steel. The GHS system consists of a gradient structured outer layer with varying grain size and a hierarchically heterostructured interlayer with varying length scales. By combining two types of heterogeneous structures, the GHS strengthens the synergistic effect, resulting in high-performance AM parts with superior strength and ductility.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Zhiheng Hu, Xiaojia Nie, Yang Qi, Hu Zhang, Haihong Zhu
Summary: This study developed a model based on modified Rosenthal's equation and Feurer's criterion to predict the critical scanning velocity for crack initiation during SLM of Al-Cu alloys. The model suggests that the molten pool center is most susceptible to crack initiation, and a small hatch spacing is beneficial for manufacturing crack-free components. Factors such as mushy zone length and cooling rate mainly affect cracking in the process.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Joe Joseph Babu, Mehrshad Mehrpouya, Thomas C. Pijper, Gydo Willemsen, Tom Vaneker
Summary: This article presents an investigative study on the effect of process parameters on the surface roughness and dimensional accuracy of downfacing surfaces. The study evaluates the influence of laser scanning speed, laser power, and layer reference on surface quality.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Hongmei Zhang, Dongdong Gu, Chenglong Ma, Meng Guo, Jiankai Yang, Han Zhang, Hongyu Chen, Changpeng Li, Kateryna Svynarenko, Konrad Kosiba
Summary: Submicron-WC reinforced Inconel 718 composites fabricated by selective laser melting exhibited a complex microstructure, with cellular and columnar dendrites forming within the molten pool. The optimal processing condition resulted in a highly dense composite with improved mechanical properties, while elongated grain boundaries caused reduced creep life and ductility. Deformation behaviors were related to microstructural defects, grain size, grain boundary morphology, and dislocation density.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Polymer Science
Lei Nie, Yaling Deng, Yingying Zhang, Qiuju Zhou, Qimin Shi, Shengping Zhong, Yi Sun, Zhong Yang, Meng Sun, Constantinus Politis, Amin Shavandi
Summary: This study developed silver-doped BCP/Alginate microclusters using the double-emulsions method, demonstrating excellent biocompatibility and antibacterial activity. The microclusters showed uniform distribution of nanoparticles and nanoparticles, adjustable morphology, and controllable drug release profiles, suggesting great potential for biomedical applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Mechanical
Qimin Shi, Yi Sun, Shoufeng Yang, Jeroen Van Dessel, Heinz-Theo Luebbers, Shengping Zhong, Yifei Gu, Michel Bila, Titiaan Dormaar, Joseph Schoenaers, Constantinus Politis
Summary: A multidimensional and comprehensive analysis of the in-vivo fatigue failure mechanism of an SLM-fabricated Ti6Al4V mandible reconstruction plate reveals that surface defects and maximal stress caused by implant design are the main factors for crack initiation and propagation, showing a combined brittle/ductile fracture mode. The process is influenced by Ca/P/O deposits and hydrogen embrittlement under the biological environment.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Biology
Qimin Shi, Yi Sun, Shoufeng Yang, Jeroen Van Dessel, Heinz-Theo Lubbers, Shengping Zhong, Yifei Gu, Michel Bila, Constantinus Politis
Summary: The combination of long and short titanium plates showed superior biomechanical properties for mandible reconstruction compared to a conventional single long plate. It provided higher safety, lower fixation instability, and good bone segment stability during masticatory activities. This preclinical evidence supports the feasibility of using short plates for complete mandible reconstruction and may have implications for treating other large-sized bone defects with customised implants using additive manufacturing technology.
COMPUTERS IN BIOLOGY AND MEDICINE
(2021)
Article
Engineering, Industrial
Qimin Shi, Raya Mertens, Sasan Dadbakhsh, Guichuan Li, Shoufeng Yang
Summary: In-situ preparation of particle reinforced Al matrix composites by laser powder bed fusion is a promising approach to strengthening Al-based alloys. Optimizing laser melting and remelting energy density, combined with high and low-energy laser scanning, can enhance the material's microstructure and mechanical properties. The developed strategy shows potential in obtaining dense materials with fine microstructure and improved mechanical properties during LPBF process.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Biomedical
Shengping Zhong, Qimin Shi, Yi Sun, Shoufeng Yang, Jeroen Van Dessel, Yifei Gu, Xiaojun Chen, Heinz-Theo Lubbers, Constantinus Politis
Summary: This study compared the biomechanical behavior between locking and non-locking PSMRP in patient-specific mandibular reconstruction. The locking PSMRP demonstrated higher strengths, better safety, flexibility, and stability compared to the non-locking PSMRP.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Lei Nie, Jie Li, Guoqi Lu, Xiaoyan Wei, Yaling Deng, Shuang Liu, Shengping Zhong, Qimin Shi, Ruixia Hou, Yi Sun, Constantinus Politis, Lihong Fan, Oseweuba Valentine Okoro, Amin Shavandi
Summary: A newly developed temperature-responsive hydrogel with interpenetrating polymer networks has shown excellent cytocompatibility towards human bone marrow mesenchymal stem cells (hBMSCs). The critical solution temperature (LCST) can be regulated by changing the weight ratio of the components. Cell encapsulation and 3D culturing in the hydrogel at a specific temperature range have been successfully achieved.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Guanghai Fei, Lei Nie, Lipeng Zhong, Qimin Shi, Kehui Hu, Cesar Parra-Cabrera, Herman Oprins, Rob Ameloot, Shoufeng Yang
Summary: Fabricating microfluidics directly onto a PCB using SLA technology with low-CTE composites is a promising method for producing integrated systems. The low-CTE resin-silica composites efficiently bond to the PCB and can be used in chemical engineering or thermal management applications.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Shengping Zhong, Qimin Shi, Yaling Deng, Yi Sun, Constantinus Politis, Shoufeng Yang
Summary: NanoParticle Jetting (NPJ), a novel material jetting process, is capable of fabricating dense zirconia components with a highly detailed surface and remarkable mechanical properties. The experimental results of NPJ-printed ZrO2 cuboids showed high relative density, glossy surface, controllable shrinkage, and outstanding mechanical properties. The innovative NPJ system has significant potential for additive manufacturing.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Chenglong Ma, Meiping Wu, Donghua Dai, Mujian Xia
Summary: This study reported the heterogeneous phase transformation and recoverable behavior of Ni5(0.6)Ti(49.4) samples fabricated by laser powder bed fusion (LPBF) during compression. The results showed considerable reversible transformations occurred even under severely deformed conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Qimin Shi, Shoufeng Yang, Yi Sun, Yifei Gu, Ben Mercelis, Shengping Zhong, Bart Van Meerbeek, Constantinus Politis
Summary: This work compares the microstructure, mechanical properties, and wear performance of two Ti-Mo biomaterials prepared by Selective Laser Melting (SLM) with different synthesis mechanisms. The in-situ Ti-7.5Mo-2.4TiC composites show improved mechanical strength and wear resistance compared to Ti-7.5Mo alloys, despite having a higher elastic modulus.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Jie Gao, Dongdong Gu, Chenglong Ma, Donghua Dai, Lixia Xi, Kaijie Lin, Tong Gao, Jihong Zhu, Yuexin Du
Summary: The study investigated the effects of LPBF printing parameters on the formability and compressive properties of the laserprinted CIT-compliant mechanism. Results showed that increasing laser power led to the elimination of residual metallurgical pores and improved dimensional accuracy and surface roughness. The deformation behavior of the LPBF-fabricated CIT mechanism exhibited four typical stages, with a deformation capacity of up to 20% before fracturing.
Article
Computer Science, Interdisciplinary Applications
Shengping Zhong, Qimin Shi, Jeroen Van Dessel, Yifei Gu, Yi Sun, Shoufeng Yang, Constantinus Politis
Summary: The study validates the biomechanical benefit of the structural optimized patient-specific mandibular reconstruction plates (PSMRPs) compared to the original design. PSMRP1 shows better biomechanical performance in patient-specific mandibular reconstruction than PSMRP2, while PSMRP2 provides biomechanical benefit in reducing the maximum tension.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Nanoscience & Nanotechnology
Qimin Shi, Shoufeng Yang, Yi Sun, Bart Van Meerbeek, Constantinus Politis
Summary: This study demonstrates an in-situ microscale composition modulation method using laser powder bed fusion, achieving a balanced combination of mechanical and wear properties in metal composites. The modulation method creates a pathway for material design and performance customization in biomedical applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Haiyang Fan, Qimin Shi, Chengcheng Wang, Yujia Tian, Kun Zhou, Shoufeng Yang
Summary: The potential applications of steel/nickel bimetals in corrosive environments are becoming more and more interesting. In this study, a bimetallic 316L/Hastelloy X was processed using laser powder bed fusion (L-PBF) with different parameters. The results showed that the rapid cooling of L-PBF reduced element segregation and carbide formation, resulting in a crack-free interface. However, due to rapid solidification, the constituent elements of dissimilar materials were not properly mixed at the interface. The interfacial width increased with increasing laser energy density, and epitaxial grain growth was observed with the optimal processing parameters. The microhardness first declined at the front of the 316L side and then increased continuously in the interfacial region with the addition of Hastelloy X. The optimally built samples failed at the 316L side during tensile tests, indicating the formation of solid bonding between the two metals.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
