Article
Materials Science, Multidisciplinary
Temel Varol, Ilyas Hacisalihoglu, Gurkan Kaya, Onur Guler, Fatih Yildiz, Huseyin Can Aksa, Serhatcan Berk Akcay
Summary: In this study, compact materials were fabricated using copper-silver core-shell particles obtained by electroless coating method through selective laser melting (SLM). The investigation focused on the effects of SLM parameters on properties such as microstructure, density, and electrical conductivity. The study showed that the parameters used significantly influenced the properties of the compacts, with silver shell thickness, apparent density, and electrical conductivity being key factors.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Fangmin Guo, Hui Shen, Zhiwei Xiong, Ying Yang, Xin Tong, Yanbao Guo, Shijie Hao
Summary: In this work, 60NiTi alloy was successfully fabricated using selective laser melting (SLM) technology. Optimal parameters of laser power and scanning speed were determined to achieve high quality and appropriate composition. The resulting SLM 60NiTi exhibited high density, low Ni loss, high compression strength, and large reversible strain. It also demonstrated superior wear resistance compared to conventionally cast 60NiTi.
Article
Engineering, Mechanical
Tianyu Yu, Junyan Liu, Yu He, Jinchuan Tian, Mingjun Chen, Yang Wang
Summary: This study investigates the microstructure evolution and wear characteristics of CNTs reinforced aluminum matrix nanocomposites produced by selective laser melting. The results show that these nanocomposites have higher hardness, strength, and good frictional and wear resistance properties compared to pure AlSi10Mg counterparts.
Article
Chemistry, Physical
David Sommer, Babette Goetzendorfer, Cemal Esen, Ralf Hellmann
Summary: The study evaluates fundamental properties of a hybrid manufacturing approach that combines selective laser melting and high speed milling, characterizes typical geometrical features and concludes on a catalogue of design rules. The hybrid approach demonstrates higher geometric accuracy and improved surface roughness compared to sole selective laser melting, with specific design rules identified for basic geometric elements.
Article
Chemistry, Physical
J. Karimi, M. Antonov, L. Kollo, K. G. Prashanth
Summary: This study aimed to enhance the surface quality and mechanical properties of a Ti6Al4V alloy manufactured using selective laser melting (SLM) by applying laser remelting. The research found that increasing the number of remelting steps can improve fatigue strength, strength, and wear resistance of the parts significantly.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
Yi Fu, Chunze Yan, Xiao Yang, Zhufeng Liu, Peng Chen, Zhaoqing Li
Summary: This research focuses on preparing metal/polymer composite materials using additive manufacturing technology, analyzing the effects of sintering parameters on SLS parts, and proposing a method for preparing nylon-12 coated copper powders. The study also discusses the interfacial reaction between nylon-12 and copper in the laser sintering mechanism, ultimately achieving the desired strength requirements through epoxy resin infiltration.
RAPID PROTOTYPING JOURNAL
(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
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
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
Engineering, Manufacturing
Tack Lee, Kenta Aoyagi, Huakang Bian, Kenta Yamanaka, Shigeo Sato, Akihiko Chiba
Summary: Low-carbon 9-12Cr heat-resistant ferritic/martensitic steels were fabricated by SEBM using two types of powders, showing high tensile strength and fine lath martensitic microstructure. The high N content in one of the components resulted in higher strength and enhanced mechanical properties. SEBM is a suitable and rapid method for fabricating low-C martensite steels for use in power plants without welding.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Physical
Xiaohong Zhan, Qiang Wang, Leilei Wang, Zhuanni Gao, Xingyun Yang
Summary: This study investigates the composite manufacturing process of wire arc additive manufacturing (WAAM) and laser melting deposition (LMD), characterizes the microstructure and tensile properties of different areas, and elucidates the formation mechanism of the interfacial microstructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Manufacturing
Sven Mueller, Peer Woizeschke
Summary: This study investigates the thermal joining of aluminum and titanium sheets using a laser powder bed fusion machine. Despite the melting of materials, there is great potential for high interfacial tensile strength in laser fusion of titanium powder on aluminum substrates.
ADDITIVE MANUFACTURING
(2021)
Article
Nanoscience & Nanotechnology
Shubham Chandra, Xipeng Tan, R. Lakshmi Narayan, Marion Descoins, Dominique Mangelinck, Shu Beng Tor, Erjia Liu, Gerald Seet
Summary: The study investigates the nanometer-scale microstructural evolution in an additively manufactured Re-free Ni-based superalloy with single crystal compositions. It finds that nano-scale primary γ' precipitation leads to exceptional microhardness, and ultra-fine γ' precipitates are observed at the bottom layers of the samples, contradicting previous consensus on hierarchical γ' phase evolution in such alloys.
SCRIPTA MATERIALIA
(2021)
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
Engineering, Manufacturing
Gurkan Kaya, Tevfik Oguzhan Erguder, Ilyas Hacisalihoglu, Emre Mandev, Eyuphan Manay, Fatih Yildiz
Summary: This study aimed to improve the tribological and thermal properties of Ti6Al4V alloys fabricated with different build orientations and hatch spacing using selective laser melting (SLM) and casting methods. The samples produced by SLM and casting were coated with TiAlN thin films using cathodic arc physical vapor deposition (CAPVD) method. Experimental results showed that the wear rate increased with increasing hatch spacing for the same build orientation of Ti6Al4V alloys produced by SLM method. Thermal analysis results indicated that the specific heat capacity and thermal conductivity values decreased as the build orientation value increased. Among the coated samples, the casting samples had the highest thermal conductivity and specific heat capacity values.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Ufuk Gencoglu, Gurkan Kaya, T. Oguzhan Erguder, Ilyas Hacisalihoglu, Fatih Yildiz
Summary: This study investigates the effects of manufacturing parameters in the selective laser melting (SLM) process on the structural, mechanical properties, and wear performance of 316L stainless steel. The experimental results show that the manufacturing parameters have a significant impact on the material's properties, and reducing the parameters can save material and time.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Metallurgy & Metallurgical Engineering
Temel Varol, Onur Guler, Serhatcan Berk Akcay, Huseyin Can Aksa
Summary: In this study, dendritic copper powders were produced using the electrolysis method and then silver coating was applied to improve the physical and mechanical properties of the materials. The silver-plated samples showed significantly increased hardness, tensile strength, electrical conductivity, and thermal conductivity. Additionally, the oxidation resistance of completely silver-coated copper powders was found to be four times higher than that of pure copper.
Article
Materials Science, Multidisciplinary
Temel Varol, Onur Guler, Serhatcan Berk Akcay, Oguzhan Cuvalci
Summary: In this study, electrolytic copper powders (ECs) were produced using the electrolysis method, and copper-silver bimetallic powders (ESCs) were obtained through electroless silver coating process. Copper-silver layered materials (ESC materials) with different process parameters were then fabricated using hot-pressing method, and the effects of hot-pressing temperature and pressures on the properties of ESC materials were investigated.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Coatings & Films
Onur Guler, Muslim celebi, Abdullah Hasan Karabacak, Aykut canakci
Summary: Researchers and manufacturers are developing enhanced coatings for Al to improve its wear resistance, including Ni-P-Cu coatings derived from scrap copper. The study found that the wear resistance of Al samples was significantly increased by Ni-P-Cu coatings, with a 60-fold improvement after a sliding distance of 100 meters.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Onur Guler
Summary: In this study, functional particles were produced by electroless coating process, which improved the tribological properties of copper. The resulting materials had significantly increased tensile and wear resistances, as well as improved electrical conductivity. These materials are ideal for applications in aerospace, automotive, and electronic industries.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Muslim Celebi, Aykut Canakci, Onur Guler, Bekir Akgul, Abdullah Hasan Karabacak
Summary: This study investigated the effect of mechanical milling time on the properties of B4C and graphene-reinforced ZA40 metal matrix hybrid nanocomposites. The results showed that increasing milling time led to a decrease in relative density but an increase in porosity. The highest values of hardness and tensile strength were obtained in the 8-hour milled HNC sample. Additionally, increasing milling time improved the wear resistance of the hybrid nanocomposite due to more uniform particle dispersion.
Article
Nanoscience & Nanotechnology
Gurkan Kaya, Fatih Yildiz, Ismail Hakki Korkmaz, Irfan Kaymaz, Ali Fatih Yetim, Tevfik Oguzhan Ergueder, Cagdas Sen
Summary: Selective laser melting (SLM) enables the manufacturing of intricate and accurate component designs that are challenging or impossible with traditional methods. In this study, the optimum production parameters for Ti6Al4V alloy were determined using the Response Surface Method (RSM), and the influence of heat treatment on mechanical properties was examined. The samples created with optimized parameters achieved high relative density and surpassed the minimum standards outlined in ASTM F3001-14.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Characterization & Testing
Gurkan Kaya, Ugur Koklu, Tevfik Oguzhan Erguder, Furkan Cengiz, Fatih Yildiz
Summary: Due to the philosophy of the process, the surface roughness is usually high for the parts produced with laser powder bed fusion (L-PBF) additive manufacturing (AM). High speed machining (HSM) is used to improve the surface quality of these parts by reducing machining errors. This study investigates the effects of different hatch spacings and build orientations on cutting forces, surface roughness, and burr formation in HSM for 316L samples produced by L-PBF.
Article
Engineering, Chemical
Oguzhan Cuvalci, Temel Varol, Serhatcan Berk Akcay, Onur Guler, Aykut canakci
Summary: Cp-Ti particles were fabricated from titanium turning chips by wet-pre milling assisted mechanical milling, with different ball to powder ratios and milling times. The smallest particle size was achieved with a ball to powder weight ratio of 15:1, which was approximately 15 times smaller than powders produced with a ratio of 5:1. XRD analysis showed the presence of TiO2 (Anatase and Rutile) peaks in the structure of Cp-Ti particles fabricated after 4 hours of milling with a ball-to-powder ratio of 15:1. However, oxidation was not observed in the results of XRD analysis for milling with low ball to powder ratios (5:1 and 10:1). The lowest apparent density and hardness were measured at 2.45 g/cm3 and 126 HV, respectively, for powders milled for 0.5 hours. The highest apparent density and hardness were measured at 3.45 g/cm3 and 325 HV, respectively, for powders milled for 7 hours.
Article
Engineering, Mechanical
Mucahit Kocaman, Serhatcan Berk Akcay, Onur Guler, Hamdullah Cuvalci, Temel Varol, Oguzhan Cuvalci
Summary: This study investigated the effect of recycled zinc powder reinforcement ratios and ball milling time on novolac matrix hybrid composites. Results showed that a ball milling time of 2 h positively influenced the hardness of the composites, reaching 100 HRM. Thermal analysis indicated that increasing zinc reinforcement ratios improved the thermal stability of the composite powders. Wear resistance assessment using a block-on-ring tribometer revealed that the incorporation of zinc particles significantly reduced wear rates, with specimens subjected to 2 h ball milling times showing superior wear resistance. Specimens with 20 wt% Zn reinforcement and 2 h ball milling time exhibited roughly 93% less wear loss than Zn-free specimens.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Chemistry, Physical
Mueslim Celebi, Aykut Canakci, Onur Gueler, Hasan Karabacak, Bekir Akguel, Serdar Ozkaya
Summary: The study aimed to investigate the production and evaluation of ZA40/Graphene/B4C hybrid nanocomposite (HNC). Graphene nanoplatelets and B4C micro-particles were combined with ZA40 powders to fabricate HNC powders (HNPs) through mechanical milling. Various tests were conducted on the consolidated samples, and the results showed that the HNC sample containing 3 wt% B4C (S3) exhibited the most favorable properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Yusuf Er, Onur Guler, Gokhan Hekimoglu, Mehrab Nodehi, Abid Ustaoglu, Ahmet Sari, Osman Gencel, Togay Ozbakkaloglu
Summary: This study utilized a Vat Photopolymerization technique to 3D print a composite resin filament containing lauric acid (LA) as a phase change material (PCM). Through various tests, it was found that the composite with 50% LA additive exhibited the highest latent heat enthalpy value and a homogeneous internal structure. Although this material caused a decrease in mechanical properties, the study demonstrated the feasibility of real-time 3D printing of PCMs with resins, solving the leakage issue and providing important implications for energy storage and insulation.
JOURNAL OF ENERGY STORAGE
(2023)