Article
Materials Science, Multidisciplinary
K. M. Bertsch, T. Voisin, J. B. Forien, E. Tiferet, Y. Ganor, M. Chonin, Y. M. Wang, M. J. Matthews
Summary: Effective optimization of Ti-6Al-4 V production using AM requires understanding the importance of different microstructural features to deformation and failure mechanisms. This study compared the tensile response and deformation mechanisms of EBM and SLM AM Ti-6Al-4 V materials and evaluated the influence of phase distribution, defect density, and porosity on material strength and ductility. The results suggest that phase distribution and defect density are crucial for determining material strength and maximum strain to failure, while porosity limits part ductility.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
X. Cui, S. Zhang, C. H. Zhang, J. Chen, J. B. Zhang, S. Y. Dong
Summary: By comparing the microstructural features of 24CrNiMo low alloy steel fabricated by SLM and LMD processes using advanced electron microscopy and electron backscatter diffraction techniques, significant differences in crystallographic orientations, grain boundaries, grain sizes, and dislocations distributions were observed. These differences can result in varied mechanical properties, providing important references for process selection in practical industrial applications.
Article
Nanoscience & Nanotechnology
Kewei Chen, Hua Li, Chong Heng Lim, Ning Jia, Weili Yan
Summary: This study shows that annealing selective laser melted Inconel 718 within a specific temperature range can result in fine grains with weak texture, while annealing at higher temperatures induces abnormal grain growth. The recrystallization process of SLM IN718 is primarily dominated by strain-induced boundary migration (SIBM) as revealed by a novel quasi-in-situ EBSD method.
SCRIPTA MATERIALIA
(2022)
Article
Metallurgy & Metallurgical Engineering
Xu Wang, Chun Hua Zhang, Feng Qiu Zhou, Song Zhang, Jiang Chen, Jing Bo Zhang
Summary: In this study, a quasi-continuous ratio gradient alloy steel with a 24CrNiMo high-strength low-alloy steel matrix for high-speed railway brake discs was fabricated by selective laser melting. The relationship between microstructure and corrosion resistance was intensively studied, showing that increasing the content of wear-resistant stainless steel (WSS) can significantly improve the material's corrosion resistance.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Atefeh Aramian, Zohreh Sadeghian, Di Wan, Yaroslav Holovenko, Nima Razavi, Filippo Berto
Summary: This study investigated the effects of different selective laser melting scan speeds on the microstructure and texture evolution of in situ TiC-NiCr cermet. The in situ formation of TiC via exothermic reaction resulted in different directions of temperature gradient in the melt pool, leading to nucleation and growth in various directions. Alpha-fiber texture could be observed in the orientation distribution function of the manufactured specimens.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
J. B. Gao, D. D. Ben, H. J. Yang, L. X. Meng, H. B. Ji, D. L. Lian, J. Chen, J. L. Yi, L. Wang, P. Li, Z. F. Zhang
Summary: This study investigates the rapid hardening and softening of SLM-Ti6Al4V alloy through electropulsing treatment, which affects the microhardness by evolving microstructures. Electropulsing treatment reduces the thermodynamic barrier for α->β solid-state phase transformation, further refining the microstructure of the SLM-Ti6Al4V alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Kewei Chen, De Jun Huang, Hua Li, Ning Jia, Warren Chong
Summary: The study showed that appropriate control of annealing time at 700 degrees Celsius can mitigate abnormal grain growth in SLM CP-Ti, resulting in fine equiaxed grains and improved tensile properties.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Wei Li, Rui Sun, Ping Wang, XiaoLong Li, Yucheng Zhang, Tianyi Hu, Cheng Li, Tatsuo Sakai
Summary: A Ni-based superalloy fabricated by selective laser melting (SLM) exhibits subsurface cracking with fisheye patterns under very high cycle fatigue (VHCF), leading to a descending S-N curve property. The subsurface failure mechanisms are related to grain size & orientation, microtexture, and crystal defects.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Yaoxiang Geng, Yingmin Wang, Junhua Xu, Shaobo Mi, Shimin Fan, Yakai Xiao, Yi Wu, Junhua Luan
Summary: A high Mg-content AlSiMg1.4 alloy was designed for selective laser melting (SLM) processing, exhibiting high strength and elongation. The presence of Mg-Si atomic clusters in the alloy acts as strong obstacles to dislocation gliding, providing an additional strengthening mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Geochemistry & Geophysics
G. D. Tolometti, T. M. Erickson, G. R. Osinski, C. Cayron, C. D. Neish
Summary: This study analyzes four different samples from the Mistastin impact structure in Canada, revealing heterogeneity of superheated conditions in impact structures.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Pan Ma, Yacheng Fang, Shuimiao Wei, Zhiyu Zhang, Hong Yang, Shiguang Wan, Konda Gokuldoss Prashanth, Yandong Jia
Summary: To enhance the forming capability and performance of AlCoCrFeNi high entropy alloy (HEA) and prevent crack formation, equiatomic CoCrFeNiMn HEA was added into equiatomic AlCoCrFeNi HEA to form a novel AlCoCrFeMnNi HEA. The formability, microstructure, and mechanical properties of three different compositions were analyzed using the selective laser melting (SLM) technique. Results showed that AlCoCrFeMnNi displayed a composite-like dual-phase structure and the SLM forming capability improved with decreasing Al content.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Kirill Starikov, Igor Polozov, Evgenii Borisov, Artem Kim, Daniil Voevodenko, Anna Gracheva, Alexey Shamshurin, Anatoly Popovich
Summary: This study investigates the impact of process parameters on microstructure and defect formation in selectively laser melted nickel-based superalloy specimens. The findings highlight the correlation between reduced interdendritic spacing and increased defect formation. Longer crystallization times and higher volumetric energy density lead to decreased defect volumes and sizes.
Article
Materials Science, Multidisciplinary
Haofeng Xie, Xiangpeng Tang, Xiaohong Chen, Fujia Sun, Liyan Dong, Yinxun Tan, Hao Chu, Honglei Zhou, Ping Liu, Shaoli Fu
Summary: This study employed green laser beam to fabricate copper-chromium-zirconium (CuCrZr) alloys and conducted post-heat treatment. The research found that the heat-treated samples along different build orientations have better mechanical and thermal properties, while the samples along build directions have higher ductility and poorer thermal conductivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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)
Review
Engineering, Manufacturing
Necati Ucak, Adem cicek, Kubilay Aslantas
Summary: In recent years, additive manufacturing (AM) of metallic parts has provided new opportunities for various industrial sectors and individual needs. While AM offers many advantages, poor surface quality of the produced parts is a common issue that requires additional machining operations. This review article investigates the machinability of 3D printed metallic parts fabricated by Selective Laser Melting (SLM) and Electron Beam Melting (EBM) technologies, and provides insights into their mechanical and physical properties. The article aims to compile relevant information and suggest machining strategies for these novel engineering materials, as well as highlight potential areas for future research.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Manufacturing
Przemyslaw Golebiewski, Pawel Wienclaw, Jaroslaw Cimek, Pawel Socha, Dariusz Pysz, Adam Filipkowski, Grzegorz Stepniewski, Olga Czerwinska, Ireneusz Kujawa, Ryszard Stepien, Rafal Kasztelanic, Andrzej Burgs, Ryszard Buczynski
Summary: We report the development of a 3D printing process for producing soft glass optical fibers. The process involves direct printing using a miniaturized crucible and depositing straight horizontally-oriented lines to replace traditional assembly techniques. Experimental results demonstrate good performance of the printed photonic crystal fiber preform.
ADDITIVE MANUFACTURING
(2024)