Article
Materials Science, Multidisciplinary
Alireza Dareh Baghi, Shahrooz Nafisi, Heike Ebendorff-Heidepriem, Reza Ghomashchi
Summary: A detailed study comparing the microstructural differences between Ti-6Al-4V parts fabricated via conventional powder metallurgy and laser powder bed fusion routes revealed that L-PBF parts have a higher microhardness with a single phase of martensitic alpha '. On the other hand, parts sintered via powder metallurgy showed two phases with lower microhardness. The rapid cooling of the beta phase had no effect on the hardening of the bulk martensitic hcp alpha ' in L-PBF parts.
Article
Engineering, Manufacturing
Gowtham Soundarapandiyan, Chu Lun Alex Leung, Carol Johnston, Bo Chen, Raja H. U. Khan, Phil McNutt, Alisha Bhatt, Robert C. Atwood, Peter D. Lee, Michael E. Fitzpatrick
Summary: This study uses in situ high speed synchrotron X-ray imaging to investigate the effects of low and high oxygen content Ti6Al4V powders on laser-matter interactions, process, and defect dynamics during multilayer thin-wall laser powder bed fusion (L-PBF). The results show that high oxygen content Ti6Al4V powder can reduce melt ejections, surface roughness, and defect population in the built parts. Increasing oxygen content in the part leads to an increase in microhardness due to solid solution strengthening, with no significant change in the microstructure.
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
(2023)
Article
Materials Science, Multidisciplinary
Ayse Kubra Yildiz, Mehmet Mollamahmutoglu, Oguzhan Yilmaz
Summary: An efficient model has been developed to evaluate the thermal behavior and microstructural transformations in the laser scanning process. The model produces consistent results and demonstrates the possibility of producing desired lamellar structures under favorable conditions.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Chemistry, Physical
David Liovic, Marina Franulovic, Ervin Kamenar, Drazan Kozak
Summary: This study investigates the influence of annealing heat treatment and different laser power-scanning speed combinations on the mechanical properties of L-PBF Ti6Al4V alloy. It was found that high laser power had a lasting effect on the microstructure, leading to increased nano-hardness even after annealing. The study also established a linear relationship between Young's modulus and nano-hardness after annealing. Thorough creep analysis revealed that dislocation motion was the dominant deformation mechanism for both as-built and annealed conditions. However, annealing heat treatment reduced the creep resistance of the alloy. The results contribute to process parameter selection and understanding the creep behavior of these materials.
Article
Nanoscience & Nanotechnology
Emanuela Cerri, Emanuele Ghio, Stefano Spigarelli, Marcello Cabibbo, Giovanni Bolelli
Summary: This study investigates the static and dynamic precipitation phenomena in the Ti6Al4V alloy produced using laser-powder bed fusion. The microstructure of the alloy varies depending on the distance from the platform during the solution heat treatment. The aging heat treatment at different temperatures promotes the formation of stacking faults and precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
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
Changhui Song, Zhuang Zou, Zhongwei Yan, Xiyu Yao, Feng Liu, Yongqiang Yang, Ming Yan, Changjun Han
Summary: This study investigated the printability, microstructure, and mechanical properties of Zr-4 alloy additively manufactured by laser powder bed fusion (LPBF) for the first time. The optimized printing parameters resulted in a Zr-4 alloy with a high relative density of 99.77%. Increasing the annealing temperature led to a microstructural change in the alloy, resulting in a high compressive strength of 2130 MPa and compressive strain of 36%. Precipitation of Zr (x) (Fe2Cr) compounds at annealing temperatures exceeding 700 degrees C strengthened the alloy by pinning effect. These findings provide valuable guidance for the manufacture of geometrically complex Zr alloy parts for nuclear power applications.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Engineering, Manufacturing
Amir Hadadzadeh, Babak Shalchi Amirkhiz, Brian Langelier, Jian Li, Mohsen Mohammadi
Summary: The study investigates the microstructural consistency in a laser powder bed fusion (L-PBF) AlSi10Mg material, finding that repeated thermal cycles affect the characteristics of precipitates and the chemistry of the matrix, while not significantly impacting the grain and cell structures.
ADDITIVE MANUFACTURING
(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
Engineering, Manufacturing
Michaela Roudnicka, Jirf Kubasek, Libor Pantelejev, Orsolya Molnarova, Jirf Bigas, Jan Drahokoupil, David Palousek, Dalibor Vojtech
Summary: In this study, the microstructural instability of Co-28Cr-6Mo alloy during laser powder bed fusion was investigated, revealing that heat treatment can remove the observed instability and increase material strength.
ADDITIVE MANUFACTURING
(2021)
Review
Materials Science, Multidisciplinary
Flavio Bartolomeu, Michael Gasik, Filipe Samuel Silva, Georgina Miranda
Summary: This review focuses on the mechanical properties of selective laser-melted Ti6Al4V parts and discusses the main processing and microstructural parameters that affect the final properties. It provides a fundamental understanding of the relationship between microstructural features and mechanical properties, including tensile strength, fatigue resistance, and wear performance. The review also compares Laser Powder Bed Fusion with conventional processing routes and discusses the presence of defects in as-built Ti6Al4V parts and their impact on mechanical performance.
Article
Materials Science, Multidisciplinary
D. Schimbaeck, J. Braun, G. Leichtfried, H. Clemens, S. Mayer
Summary: The study focused on investigating the processability and microstructural features of a powder-based TNM alloy with high Al content, as well as developing a tailored heat treatment to adjust the microstructure for balanced mechanical properties. The research showed that process parameters directly influence the microstructure, and post-processing heat treatment can tailor the microstructure to achieve specific properties.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Nthateng Nkhasi, Willie du Preez, Hertzog Bissett
Summary: Metal powders used in powder bed additive manufacturing should have specific characteristics, and plasma spheroidisation can improve the morphology of metal powders, making them suitable for additive manufacturing.
Article
Nanoscience & Nanotechnology
Jillian Stinehart, Luis Fernando Ladinos Pizano, Wei Xiong, Le Zhou
Summary: Aluminum-Cerium (Al-Ce) based alloys have shown promise as cost-efficient high temperature creep-resistant aluminum alloy. This study investigates the creep property and microstructural evolution of a near eutectic Al-10Ce alloy manufactured by LPBF. The alloy exhibited good creep resistance and relatively stable microstructure after creep deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
L. X. Meng, H. J. Yang, S. G. Wang, H. B. Ji, X. H. Shao, Z. J. Zhang, D. C. Ren, X. Zhang, J. B. Yang, X. H. An, Y. T. Pei, J. Th. M. De Hosson, R. Yang, Z. F. Zhang
Summary: In this study, high initial porosity L-PBF Ti6Al4V samples were designed and treated with EAMF, leading to a reduction in porosity, while simultaneously improving strength and ductility. The defect-healing mechanism consisting of multiple stages was revealed, and the competitive relationship between defect-healing and microstructure coarsening was also uncovered.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Ceramics
S. Bakkar, M. Pantawane, J. J. Gu, A. Ghoshal, M. Walock, M. Murugan, M. L. Young, N. Dahotre, D. Berman, S. M. Aouadi
CERAMICS INTERNATIONAL
(2020)
Article
Physics, Applied
Mangesh Pantawane, William B. Robertson, Riaz J. K. Khan, Daniel P. Fick, Narendra B. Dahotre
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Engineering, Biomedical
Mangesh Pantawane, Richard T. Chipper, William B. Robertson, Riaz J. K. Khan, Daniel P. Fick, Narendra B. Dahotre
LASERS IN MEDICAL SCIENCE
(2020)
Article
Materials Science, Biomaterials
Jonathan Z. Lu, Sameehan S. Joshi, Mangesh Pantawane, Yee-Hsien Ho, Tso-Chang Wu, Narendra B. Dahotre
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2019)
Article
Materials Science, Biomaterials
Mangesh Pantawane, Yee-Hsien Ho, William B. Robertson, Riaz J. K. Khan, Daniel P. Fick, Narendra B. Dahotre
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2020)
Article
Engineering, Biomedical
Sucharita Banerjee, Mangesh V. Pantawane, Narendra B. Dahotre
Summary: This study investigated the surface morphology features of laser-ablated bone using different laser parameters and their influence on biomineralization. Through in vitro immersion tests in simulated body fluid, the presence of hydroxyapatite was confirmed on the laser-ablated region.
LASERS IN MEDICAL SCIENCE
(2021)
Article
Materials Science, Coatings & Films
Michael T. Wall, Mangesh Pantawane, Sameehan Joshi, Faith Gantz, Nathan A. Ley, Rob Mayer, Andy Spires, Marcus L. Young, Narendra Dahotre
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Mangesh V. Pantawane, Sriswaroop Dasari, Srinivas Aditya Mantri, Rajarshi Banerjee, Narendra B. Dahotre
MATERIALS RESEARCH LETTERS
(2020)
Article
Nanoscience & Nanotechnology
Mohan Sai Kiran Kumar Yadav Nartu, Srinivas A. Mantri, Mangesh Pantawane, Yee-Hsien Ho, Brandon McWilliams, Kyu Cho, Narendra B. Dahotre, Rajarshi Banerjee
SCRIPTA MATERIALIA
(2020)
Article
Engineering, Biomedical
Yee-Hsien Ho, Kun Man, Sameehan S. Joshi, Mangesh Pantawane, Tso-Chang Wu, Yong Yang, Narendra B. Dahotre
BIOACTIVE MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Srinivas Aditya Mantri, Sriswaroop Dasari, Abhishek Sharma, Talukder Alam, Mangesh V. Pantawane, Mayur Pole, Shashank Sharma, Narendra B. Dahotre, Rajarshi Banerjee, Srikumar Banerjee
Summary: Laser surface engineering has been used to simulate microstructural evolution during laser-based additive manufacturing of Alloy 718. The micro-segregation of alloying elements in the fusion zone has a significant impact on local precipitation behavior. The dendritic structure formed by rapid melting and solidification exhibits three distinct zones and contains various types of precipitates within the austenite matrix.
Article
Nanoscience & Nanotechnology
Mangesh Pantawane, Teng Yang, Yuqi Jin, Sangram Mazumder, Mayur Pole, Sriswaroop Dasari, Arkadii Krokhin, Arup Neogi, Sundeep Mukherjee, Rajarshi Banerjee, Narendra B. Dahotre
Summary: This study compared the dynamic and static elastic constants of laser powder bed fusion additively manufactured Ti6Al4V alloy with the wrought Ti6Al4V using an effective bulk modulus elastography technique. The dynamic elastic constants were found to be slightly lower than the static elastic constants. Microstructural analysis and computational modeling revealed the origin of the high defect density in the additively manufactured Ti6Al4V.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Mangesh Pantawane, Shashank Sharma, Abhishek Sharma, Sriswaroop Dasari, Srikumar Banerjee, Rajarshi Banerjee, Narendra B. Dahotre
Summary: This study used finite element analysis and experimental observations to reveal the evolution of martensite structure in Ti6Al4V during LPBF-AM process. The martensite in water-quenched samples was thinner compared to LPBF-AM Ti6Al4V, and it gradually coarsened and distorted after laser treatments. Multiple generations of crystallographic twins were also detected in LPBF-Ti6Al4V, which were not common in water-quenched wrought Ti6Al4V.
Article
Materials Science, Multidisciplinary
Sangram Mazumder, Mangesh V. Pantawane, Yee-Hsien Ho, Narendra B. Dahotre
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2020)