Article
Engineering, Manufacturing
Yaojie Wen, Baicheng Zhang, Ramasubramanian Lakshmi Narayan, Pei Wang, Xu Song, Hao Zhao, Upadrasta Ramamurty, Xuanhui Qu
Summary: A novel method for LPBF of large-scale compositionally graded alloy components was devised and demonstrated in this study, showing defect-free samples with smooth end-to-end variations in composition and microstructures. This method has the potential to be extended to other material combinations for creating high quality CGA components.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Shahir Mohd Yusuf, Xiao Zhao, Shoufeng Yang, Nong Gao
Summary: This study investigates the interfacial region of multi-material 316L stainless steel/Inconel 718 fabricated by laser powder bed fusion (L-PBF) for the first time, demonstrating solid metallurgical bonding with average microhardness measurements of 265 HV, 304 HV, and 223 HV at different regions.
Article
Automation & Control Systems
Mahyar Khorasani, AmirHossein Ghasemi, Martin Leary, Laura Cordova, Elmira Sharabian, Ehsan Farabi, Ian Gibson, Milan Brandt, Bernard Rolfe
Summary: This research discusses the factors that affect the meltpool depth in laser-based powder bed fusion and proposes a methodology to estimate it using simulation and validation. The developed predictive analytical model accurately estimates the meltpool depth, saving time and cost in manufacturing tasks.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Jose M. Zea Perez, Jorge Corona-Castuera, Carlos Poblano-Salas, John Henao, Arturo Hernandez Hernandez
Summary: The study found that printing contour strategies can significantly reduce fabrication time for thin-walled honeycomb lattice structures (up to 50%), improving manufacturability and dimensional accuracy. An increase in young modulus up to 0.8 times and improvement in energy absorption up to 48% was observed compared to structures produced using a standard strategy.
RAPID PROTOTYPING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Jiun-Ren Hwang, Jing-Yuan Zheng, Po-Chen Kuo, Chou-Dian Huang, Chin-Ping Fung
Summary: This study optimized the manufacturing parameters of LPBF casting Inconel 718 alloy using the Taguchi method and principal component analysis, finding that the optimal combination can achieve the highest tensile strength, with the interlayer angle being the most important control factor.
Article
Materials Science, Multidisciplinary
Dirk Herzog, Karim Asami, Christoph Scholl, Christoph Ohle, Claus Emmelmann, Ashish Sharma, Nick Markovic, Andy Harris
Summary: Additive manufacturing has been widely used across industries to open up design possibilities for lightweight, cost-effective, and integrated parts. However, the lack of design guidelines for this manufacturing process hinders the full utilization of its benefits. In aerospace, additive manufacturing offers design freedom for weight reduction and performance optimization. Understanding material-specific and manufacturing process limits is crucial for effective design. This paper presents design guidelines for laser powder bed fusion using Inconel 718, providing insights into critical design features, manufacturing directions, accuracy, and quality.
JOURNAL OF LASER APPLICATIONS
(2022)
Article
Optics
Mahyar Khorasani, AmirHossein Ghasemi, Martin Leary, David Downing, Ian Gibson, Elmira G. Sharabian, Jithin Kozhuthala Veetil, Milan Brandt, Stuart Bateman, Bernard Rolfe
Summary: This study proposes novel benchmarks to detect conduction and keyhole modes in Laser-Based Powder Bed Fusion (LB-PBF) of Inconel 718. These benchmarks help establish a process window for desirable part quality and improved mechanical properties. By controlling the transition from conduction to keyhole mode, the bonding quality can be enhanced.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Paul R. Gradl, Darren C. Tinker, John Ivester, Shawn W. Skinner, Thomas Teasley, John L. Bili
Summary: This study evaluates a series of additively manufactured geometric feature build plates to compare baseline variations and process capabilities between different Laser Powder Bed Fusion machine configurations. The systematic error for build accuracy across all features was 23.8 +/- 5.5 mu m with a 99.9% confidence interval.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Camille Pauzon, Ahmad Raza, Eduard Hryha, Pierre Foret
Summary: This study focused on the characterization of powder degradation during L-PBF of Alloy 718, revealing the significant impact of surface-to-volume ratio of built components on powder quality and oxide formation.
MATERIALS & DESIGN
(2021)
Article
Engineering, Manufacturing
P. Mohammadpour, H. Yuan, A. B. Phillion
Summary: This study combines optical and electron microscopy techniques with thermodynamic simulations to evaluate the solidification performance and precipitate formation in Inconel625 LPBF microstructure. Experimental and computational methods are used to determine the level of microsegregation and patterns, as well as the identification of precipitates embedded in the interdendritic regions.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
C. Bianchetti, M. G. Tsoutsouva, L. Toualbi, P. Kanoute
Summary: This study compares the impact of surface modification on the fatigue life of Inconel 718 manufactured by laser-powder bed fusion at 550 degrees C. The results show that the as-built samples have a longer fatigue lifetime compared to the as-machined samples. Additionally, shot peening increases the fatigue lifetime, while oxidation treatment at high temperature does not affect the fatigue life.
MATERIALS CHARACTERIZATION
(2023)
Article
Mathematics, Applied
Patcharapit Promoppatum, Vitoon Uthaisangsuk
Summary: The study developed a finite element framework to predict part-scale residual stress in the LPBF process of Inconel 718, using two-scale models coherently.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2021)
Article
Engineering, Mechanical
Chuanli Yu, Zhiyong Huang, Zian Zhang, Jiebin Shen, Jian Wang, Zhiping Xu
Summary: The combination effect of hot isostatic pressing (HIP) and machining is found to be the most effective in improving fatigue resistance. Smaller pore defects may potentially serve as crack initiation sites, highlighting the importance of machining to reduce surface roughness and remove pore-rich layers. The study also shows a linear relationship between the ratio of pore area to rough area and fatigue life in logarithmic coordinates.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Manufacturing
Emre Tekoglu, Alexander D. O'Brien, Jian Liu, Baoming Wang, Sina Kavak, Yong Zhang, So Yeon Kim, Shitong Wang, Duygu Agaogullari, Wen Chen, A. John Hart, Ju Li
Summary: In this study, a nickel superalloy metallic matrix composite (Ni-MMC) was additively manufactured using laser powder bed fusion (LPBF). SiC nanowires (2 vol%) were decorated on the surface of Inconel 718 alloy particles, resulting in the in-situ formation of Nb- and Ti-based silicide and carbide nanoparticles during laser melting. The in-situ formed nanoparticles improved the solidification microstructure and mechanical properties of the AM Inconel 718. Heat treatment further enhanced the strength of the composite samples while maintaining good ductility.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Giulio Marchese, Eleonora Atzeni, Alessandro Salmi, Sara Biamino
Summary: The study found that different heat treatments have varying effects on Inconel 718, with 800 degrees Celsius heat treatment maintaining the original microstructure and reducing residual stresses, while higher temperature treatments lead to the dissolution of the melt pool and dendritic structures, significantly reducing residual stresses.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Physics, Fluids & Plasmas
D. Iadicicco, S. Bassini, M. Vanazzi, P. Munoz, A. Morono, T. Hernandez, I Garcia-Cortes, F. J. Sanchez, M. Utili, F. Garcia Ferre, F. Di Fonzo
Article
Nuclear Science & Technology
D. Iadicicco, M. Vanazzi, F. Garcia Ferre, B. Paladino, S. Bassini, M. Utili, F. Di Fonzo
FUSION ENGINEERING AND DESIGN
(2019)
Article
Materials Science, Multidisciplinary
T. Hernandez, F. J. Sanchez, F. Di Fonzo, M. Vanazzi, M. Panizo, R. Gonzalez-Arrabal
JOURNAL OF NUCLEAR MATERIALS
(2019)
Article
Multidisciplinary Sciences
Erkka J. Frankberg, Janne Kalikka, Francisco Garcia Ferre, Lucile Joly-Pottuz, Turkka Salminen, Jouko Hintikka, Mikko Hokka, Siddardha Koneti, Thierry Douillard, Berangere Le Saint, Patrice Kreiml, Megan J. Cordill, Thierry Epicier, Douglas Stauffer, Matteo Vanazzi, Lucian Roiban, Jaakko Akola, Fabio Di Fonzo, Erkki Levanen, Karine Masenelli-Varlot
Article
Materials Science, Coatings & Films
A. Zaborowska, L. Kurpaska, E. Wyszkowska, M. Clozel, M. Vanazzi, F. Di Fonzo, M. Turek, I Jozwik, A. Kosinska, J. Jagielski
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Physics, Fluids & Plasmas
Boris Paladino, Matteo Vanazzi, Daniele Iadicicco, Andrea Perinot, Mario Caironi, Luca Ceseracciu, Pierfranco Reccagni, Serena Bassini, Marco Utili, Fabio Di Fonzo
Article
Nuclear Science & Technology
Marco Utili, Serena Bassini, Sebastiano Cataldo, Fabio Di Fonzo, Michal Kordac, Teresa Hernandez, Klara Kunzova, Julia Lorenz, Daniele Martelli, Boris Padino, Alejandro Morono, Mariano Tarantino, Carsten Schroer, Gandolfo Alessandro Spagnuolo, Ladislav Vala, Matteo Vanazzi, Alessandro Venturini
Summary: In the European DEMO project, addressing the technological challenge of tritium permeation from breeder material to the Water Coolant System in Water Cooled Lithium Lead Breeding Blanket, protective coatings like alumina-based coatings are used to reduce permeation rates and ensure chemical compatibility with PbLi alloy. The ultimate goal is to scale up these coating technologies from laboratory scale to blanket scale for application in the WCLL BB.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Tim Boot, Ton Riemslag, Elise Reinton, Ping Liu, Carey L. Walters, Vera Popovich
Summary: This study presents the design and demonstration of an in-situ test setup for pipeline steels in high pressure gaseous hydrogen environment. The setup effectively characterizes Hydrogen Embrittlement (HE) in steels, showing significant reduction in elongation and cross-sectional area under 100 barg H-2 testing condition. SEM fractography analysis identifies a shift from ductile fracture mechanisms to a brittle transgranular type fracture characteristic of HE.
Article
Materials Science, Multidisciplinary
Lorenzo Etienne Faucon, Tim Boot, Ton Riemslag, Sean Paul Scott, Ping Liu, Vera Popovich
Summary: In this study, the hydrogen fatigue behavior of pipeline steel X60, its girth welds, and weld defects was investigated using in situ fatigue testing. The results showed that both the base metal and weld metal experienced a reduction in fatigue life in the presence of hydrogen. Hydrogen accelerated crack growth, especially in the weld metal, where it also resulted in a decrease in resistance to crack initiation. The presence of large macropores on the notch surface significantly reduced fatigue life. The study also highlighted the importance of evaluating existing defects in pipelines before using them for hydrogen transport.
Article
Materials Science, Multidisciplinary
V. Bertolo, L. Vilasi, Q. Jiang, T. Riemslag, S. Scott, C. L. Walters, J. Sietsma, V. Popovich
Summary: The effect of grain refinement on cleavage fracture toughness in multiphase steels containing brittle inclusions is studied. The results show that grain refinement effectively improves the fracture toughness of these steels by reducing the grain size.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
Zhaorui Yan, Jia-Ning Zhu, Evgenii Borisov, Ton Riemslag, Sean Paul Scott, Marcel Hermans, Jovana Jovanova, Vera Popovich
Summary: In this study, NiTi architectured materials with anisotropic superelastic response, recoverable energy absorption and damping were successfully manufactured using laser powder bed fusion (L-PBF). Numerical models showed that the superelastic and effective transformation stress of NiTi materials can be controlled by relative density and cell architecture. Cyclic compressive tests demonstrated stable reversible strain and damping behavior without yielding damage or plastic buckling, indicating that progressive martensitic transformation is the main mechanism for deformation and energy dissipation. The integration of computational and experimental approaches allows tailoring of superelasticity through structural design and microstructural control.
ADDITIVE MANUFACTURING
(2023)
