Article
Chemistry, Physical
Siyu Chen, Jun Wang, Zhao Yuan, Zhe Wang, Dan Du
Summary: This paper investigates the microstructure characteristics, mechanical properties, and arc erosion behavior of Ag-CuO materials prepared by SLM, showing that they exhibit excellent self-repairing characteristics and are suitable for low voltage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Maryama Hammi
Summary: This study investigated the wetting behavior of phosphate glass-based composites, revealing the influence of fillers on wetting characteristics, as well as the good dispersion of fillers within the glass matrix.
Article
Chemistry, Physical
Hailong Liao, Wenqi Zhang, Changpeng Chen, Baijin Chen, Gang Xue, Haihong Zhu
Summary: In this study, near full density and crack-free hybrid aluminum matrix composites (HAMCs) reinforced with Cr3C2 ceramic particles and Ni-Cr trace elements were successfully fabricated using selective laser melting (SLM). The incorporation of trace elements Ni and Cr led to the formation of various intermetallic compounds, providing significant precipitation strengthening effect. The load transfer from matrix to the reinforcing particles and the formation of acicular Al4C3 at the interface between Cr3C2 and the matrix played important roles in strengthening the metal matrix composites. The HAMCs exhibited a 32% increase in microhardness and a 22% increase in compressive strength, but a significant reduction (26%) in tensile properties due to the sensitivity of the ceramic particle cracks to tensile stress.
Article
Materials Science, Multidisciplinary
Zhanyong Zhao, Shijie Chang, Jie Wang, Peikang Bai, Wenbo Du, Wenjie Zhao
Summary: The interface between graphene and Mg2Si exhibits small interfacial adhesion work and large interfacial energy, primarily maintained by strong van der Waals force. There are no chemical bonds formed at the Gr/Mg2Si interface. Therefore, it is recommended to avoid the Gr/Mg2Si interface in the preparation of Gr/AlSi10Mg composites.
Article
Chemistry, Physical
Zezhou Kuai, Zhonghua Li, Bin Liu, Yanlei Chen, Huodong Li, Peikang Bai
Summary: Additive/subtractive hybrid manufacturing technology combines product design, software control, and additive manufacturing with subtractive technology, enabling the metallurgical bonding of dissimilar materials. In this study, hybrid parts made of CuCrZr and 316 L stainless steel were fabricated using selective laser melting technology. The microstructure and mechanical properties of the fabricated materials and the interface between them were studied. Good metallurgical bonding was achieved at the 316 L/CuCrZr interface, despite the complex metal flow and changes in grain size caused by the laser.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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
Chemistry, Physical
Ruirui Yang, Keyu Chen, Shifeng Wen, Shijie Zhu, Haotian Qin, Xiaochao Wu, Yan Zhou, Yusi Che, Yusheng Shi, Jilin He
Summary: This study successfully fabricated AS41 magnesium alloy samples using selective laser melting (SLM) technique, and investigated the effect of laser energy densities on the metallurgical quality. Results showed that the optimal laser energy density range was 60 to 100 J/mm³. The SLM process introduced more grain recrystallization and hindered the movement of dislocations, resulting in dislocation strengthening and grain refinement strengthening. The ultimate tensile strength and microhardness were significantly improved compared to the as-cast state.
Article
Chemistry, Physical
Debajyoti Bhaduri, Tina Ghara, Pavel Penchev, Soumitra Paul, Catalin Pruncu, Stefan Dimov, David Morgan
Summary: A novel LP strategy was proposed to improve the re-melting of aluminium alloys by introducing a thermally insulating ceramic baseplate, resulting in significant reductions in surface roughness and residual stresses. The study highlights the importance of controlling heat dissipation in laser polishing of thermally conductive materials to achieve desired surface integrity properties.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Shuya Zhang, Xin Lin, Lilin Wang, Xiaobin Yu, Yunlong Hu, Haiou Yang, Liming Lei, Weidong Huang
Summary: The microstructures and mechanical properties of Inconel 718 (IN718) alloy fabricated by selective laser melting (SLM) are evaluated under different conditions, with strengthening mechanisms including grain boundary, solid solution, precipitation, and dislocation strengthening. The strength is consistently higher in the horizontal direction than in the vertical direction, attributed to differences in dislocation density, effective grain size, and Taylor factor.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Haoxiang Wang, Xin Lin, Nan Kang, Zehao Qin, Shuoqing Shi, Jiacong Li, Weidong Huang
Summary: Hybrid manufacturing combines additive manufacturing techniques with traditional processing methods to create complex structures on regular components. This study used selective laser melting to produce a bimetal material on a deformed Al6061 alloy substrate, and investigated the interface characteristics and mechanical properties of the hybrid manufactured samples.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Optics
E. Cuesta, S. Giganto, B. J. Alvarez, J. Barreiro, S. Martinez-Pellitero, V Meana
Summary: This research focuses on the metrological suitability of a laser line scanner for parts manufactured by Selective Laser Melting, and concludes that filters based on the standard deviation of the point cloud are the best candidates to obtain laser measurements closer to contact measurements.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Y. W. Guo, W. Wei, W. Shi, D. Xue, X. R. Zhou, S. P. Wen, X. L. Wu, K. Y. Gao, H. Huang, Z. R. Nie
Summary: In this study, Selective Laser Melting (SLM) was used to fabricate Erbium-modified AlSi7Mg alloy. The effects of laser volumetric energy density and focus shift on surface quality, internal defects, and microstructure were investigated. It was found that a higher volumetric energy density resulted in larger aluminum sub-cells and promoted the precipitation of supersaturated silicon elements. Laser focus shift changed the energy density and molten pool size, thereby affecting internal defects, sub-cell size, and eutectic silicon particle size. By using optimized processing parameters, a small amount of equiaxed grains formed at the boundary of the molten pool, which improved the refinement of columnar grains and enhanced mechanical properties. The alloy produced with SLM had a yield strength of 297 MPa, a tensile strength of 441 MPa, and an elongation of 8%.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Construction & Building Technology
Jiayun Xu, Biao Ma, Shulin Zhou, Weijie Mao, Xiaoqing Wang
Summary: Based on the Wenzel model and Cassie model, this paper established a new wetting model for irregular rough surfaces and calculated the wetting depth and apparent contact angle. The experimental results showed significant differences in the surface texture parameters of different aggregates. The relative error between the predicted and measured contact angles was less than 15%, indicating excellent prediction effect. The wetting model analysis revealed that the surface tension of the test liquid, lithology of the solid aggregate, surface roughness, and texture structure are important control parameters affecting wetting.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Hong Wu, Yaojia Ren, Junye Ren, Luxin Liang, Ruidi Li, Qihong Fang, Anhui Cai, Quan Shan, Yingtao Tian, Ian Baker
Summary: The effect of volumetric energy density (VED) on the fabrication of AlSi10Mg alloy by selective laser melting (SLM) was investigated, revealing different melting modes and resulting in varied microstructural evolution and mechanical properties. Higher VED led to the formation of keyhole defects and two types of molten pools, affecting the grain size, Si network, and mechanical properties of the SLM parts differently.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Dongyun Zhang, Denghao Yi, Xuping Wu, Zhiyuan Liu, Weidong Wang, Reinhart Poprawe, Johannes Henrich Schleifenbaumc, Stephan Zieglerd
Summary: In this study, a 10 wt% SiC-reinforced AlSi10Mg-based composites were prepared by selective laser melting (SLM) process. It was found that higher laser linear energy density promoted in-situ reaction between SiC particles and Al melt, resulting in the formation of Al4SiC4 phase. This led to improved mechanical properties and uniform distribution of SiC particles and Al4SiC4 phase in the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Manufacturing
Yang Qi, Hu Zhang, Xiaojia Nie, Zhiheng Hu, Haihong Zhu, Xiaoyan Zeng
ADDITIVE MANUFACTURING
(2020)
Article
Materials Science, Multidisciplinary
Yang Qi, Hu Zhang, Junjie Zhu, Xiaojia Nie, Zhiheng Hu, Haihong Zhu, Xiaoyan Zeng
MATERIALS CHARACTERIZATION
(2020)
Article
Materials Science, Multidisciplinary
Zhongxu Xiao, Changpeng Chen, Haihong Zhu, Zhiheng Hu, Balasubramanian Nagarajan, Lianbo Guo, Xiaoyan Zeng
MATERIALS & DESIGN
(2020)
Article
Engineering, Industrial
Changpeng Chen, Zhongxu Xiao, Haihong Zhu, Xiaoyan Zeng
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2020)
Article
Engineering, Manufacturing
Zhiheng Hu, Yang Qi, Shubo Gao, Xiaojia Nie, Hu Zhang, Haihong Zhu, Xiaoyan Zeng
Summary: The research on aging responses of selective laser melted AlCu5MnCdVA alloys found that precipitate strengthening makes a significant contribution to the strength. The type and quantity of precipitates formed at different aging temperatures have varying effects on the alloy's strength and ductility. Controlling the formation and evolution of precipitates can improve the mechanical properties of the alloy.
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
Zhiheng Hu, Yang Qi, Xiaojia Nie, Hu Zhang, Haihong Zhu
Summary: An Al-Cu alloy fabricated by selective laser melting was chosen to study the Portevin-Le Chatelier (PLC) effects. The study revealed that heat treatment decreases dislocation density and the decrease in solute atom concentration and dislocation density are responsible for the attenuation of PLC effects. The strong anisotropy in PLC effects observed in the as-built samples is attributed to grain structure and texture.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Manufacturing
Zhiheng Hu, Yang Qi, Balasubramanian Nagarajan, Xiaojia Nie, Hu Zhang, Haihong Zhu, Xiaoyan Zeng
Summary: Selective laser melting (SLM) is a powder bed based additive manufacturing technology expected to fabricate complex parts. This study systematically investigated the evolution of top surface roughness during SLM of an Al-Cu alloy, revealing that fluid flow intensity and molten pool overlapping affect surface roughness, with increases in layer number contributing to spreading of the molten pool but also harming top surface quality with increased powder thickness.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Wenqi Zhang, Hailong Liao, Zhiheng Hu, Shasha Zhang, Baijin Chen, Huanqing Yang, Yun Wang, Haihong Zhu
Summary: This study investigates the interfacial characteristics and mechanical properties of copper/steel bimetal prepared by directed energy deposition. It reveals that the laser power significantly influences crack formation at the solidification stage, and optimal parameters can lead to crack-free interfaces and improved mechanical properties in the bimetal.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Lei Zhang, Zhiheng Hu, Michael Yu Wang, Stefanie Feih
Summary: This study presents a systematic framework for analyzing the geometric and mechanical properties of hierarchical sheet triply periodic minimal surface (TPMS) lattices. Finite element simulations and experimental validation show that hierarchical lattices exhibit varying mechanical behaviors at different densities, indicating a wide range of potential applications.
MATERIALS & DESIGN
(2021)
Article
Engineering, Manufacturing
Yang Qi, Zhiheng Hu, Hu Zhang, Xiaojia Nie, Changchun Zhang, Haihong Zhu
Summary: This study reports a novel Al-Li alloy developed specifically for LPBF technology, utilizing laser glazing to approximate solidification conditions. A new Al-Cu-Li-Sc-Zr alloy was successfully processed by LPBF with high building rate and low Li loss rate, showing excellent tensile properties.
ADDITIVE MANUFACTURING
(2021)
Article
Nanoscience & Nanotechnology
Zhiheng Hu, Shubo Gao, Lei Zhang, Xiaojun Shen, Hang Li Seet, Sharon Mui Ling Nai, Jun Wei
Summary: This study demonstrates the feasibility and advantages of using micro laser powder bed fusion (mu-LPBF) to fabricate materials with excellent mechanical properties. By controlling the fine microstructures generated by mu-LPBF, high strength and good elongation can be achieved.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zhiheng Hu, Shubo Gao, Junfei Tai, Shuo Qu, Junhao Ding, Xu Song, Zheng Fan
Summary: This study presents a quantitative method for adjusting the grain structure in laser powder bed fusion. Square-bottomed columnar grains (SCGs) with a certain width were developed based on distinguishable microstructural features between the melt-pool side and centreline. The controllable properties of SCGs were validated through ultrasonic attenuation measurements and microhardness tests.
MATERIALS RESEARCH LETTERS
(2023)
Proceedings Paper
Engineering, Manufacturing
Balasubramanian Nagarajan, Zhiheng Hu, Shubo Gao, Xu Song, Rui Huang, Matteo Seita, Jun Wei
ADVANCED SURFACE ENHANCEMENT, INCASE 2019
(2020)
Article
Engineering, Manufacturing
Changpeng Chen, Shijie Chang, Junjie Zhu, Zhongxu Xiao, Haihong Zhu, Xiaoyan Zeng
JOURNAL OF MANUFACTURING PROCESSES
(2020)
