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Additive Manufacturing Group
Permanent Employee
Makoto Watanabe
Deputy Director, Research Center for Structural Materials
Group Leader
Keyword : additive manufacturing, thermal spray coatings, metallic materials, heat-resistant materials, materials integration, DX, numerical simulation
Dongfeng He
Principal Researcher
Keyword : magnetic sensors, nondestructive testing, thermography, eddy current, electromagnetic, rebar corrosion, laminate material defects
Tomonori Kitashima
Principal Researcher
Keyword : titanium alloy, nickel-based superalloy, additive manufacturing, high-temperature deformation, microstructure control, precipitation, phase transformation, texture, single crystal
Christopher Mercer
Principal Researcher
Keyword : low thermal expansion, auxetics, lattices, additive manufacturing, geometry optimization
Masahiro Kusano
Senior Researcher
Keyword : metal additive manufacturing, finite element thermal analysis, process monitoring, microstructure control
Fabien Briffod
Researcher
Keyword : Crystal Plasticity, Finite Element Method, Continuum Mechanics, Fatigue and Fracture, Digital Image Correlation
Fixed Term Employee

NIMS Special Researcher
Keyword : Multi-phase field method coupled with CALPHAD,
Lattice Boltzmann method, Computational fluid dynamics,
Multi-physics & scale simulation for additive manufacturing

Keyword : Additive manufacturing, High-temperature superalloy, Phase and microstructure control
Trainee
- Taisei Nakayama
NIMS Junior Researcher - Medha Shrey
NIMS Internship - Subhakar Mangam
International Cooperative Graduate Program - Li He
Trainee - Marie Maximilien Louis Galiegue
Trainee
Publications
2025
Meng L., Kitashima T., Lin P., Wang Z., Jiang Z., Huang Q., Zhao J.
Achieving polymer-like ultrahigh elasticity in Ti−6Al−4V alloy via a new cryo-deformation induced α′-to-α″ martensite phase transformation
Acta Materialia.293(2025)121109
Daram P., Kusano M., Watanabe M.
Investigation of the Process Optimization for L-PBF Hastelloy X Alloy on Microstructure and Mechanical Properties
Materials.18[8](2025)1890
Bhandari L., Gaur V., Briffod F., Shiraiwa T., Enoki M.
High-temperature fatigue and creep damage mechanism in additively manufactured Ti-6Al-4V alloy
Engineering Failure Analysis.174(2025)109534
Katagiri J., Nomoto S., Kusano M., Watanabe M.
Influence of high Reynolds number flow inside molten pool on keyhole instability-induced pore formation process in laser powder bed fusion
Materials Today Communications.44(2025)111756
Nomoto S., Kusano M., Kitashima T., Watanabe M.
Numerical simulation method for the laser powder bed fusion process by lattice Boltzmann and multi-phase field methods
Computational Materials Science.250(2025)113688
Meng L., Kitashima T., Lin P., Zheng L., Jiang Z., Zhao J.
In situ EBSD investigation of microtexture evolution and slip activation of α macrozones during tensile deformation in Ti-6Al-4V alloy
Materials Science and Engineering: A.924(2025)147739
Honda H., Watanabe M.
Measurement of Laser Absorptivity of Inconel Powders with Additive Manufacturing Machine
Materials Transactions.66[1](2025)107-112
Briffod F., Yasuda K., Zhu J., Shiraiwa T., Jhon M., Gunawan F., Sahay R., Raghavan N., Budiman A.S., Enoki M.
Fatigue and fracture of accumulative roll-bonded Cu/Nb materials: Effects of layer thickness and loading direction
International Journal of Fatigue.193(2025)108772
2024
Mercer C., Hasegawa A., Hosoda N.
Surface-activated bonding between a 3D-printed Ti-6Al-4V structure and bulk aluminum
Journal of Materials Science: Materials in Engineering.19[1](2024)47
Kuroda T., Masuyama H., Toda Y., Matsunaga T., Ito T., Watanabe M., Ozasa R., Ishimoto T., Nakano T., Shimojo M., Yamabe–Mitarai Y.
Microstructure Evolution and High–Temperature Mechanical Properties of Ti–6Al–4Nb–4Zr Fabricated by Selective Laser MeltingNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals.88[12](2024)348-356
Bulgarevich D.S., Watanabe M.
Stress–strain curve predictions by crystal plasticity simulations and machine learning
Scientific Reports.14[1](2024)29492
Hagiwara M., Kitashima T.
High Cycle Fatigue and Very High Cycle Fatigue of Orthorhombic (O + α2)–Type Ti–27.5Nb–13Al Alloy with and without B and Fatigue Striation Analysis in Comparison with (α + β)–Type Titanium Alloys
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals.88[12](2024)357-366
Katagiri J., Nomoto S., Kusano M., Watanabe M.
Effect of mushy zone constant in Voller-Prakash model on keyholing behaviour in laser powder bed fusion simulation
Results in Engineering.24(2024)103567
Verona I.C.M., Bardolaza H.R., Juguilon V.P.P., Bulgarevich D.S., Watanabe M., Tani M., Estacio E.S.
Investigation of Spin-Current Lifetime in Fe/Pt Spintronic Terahertz Emitter using Double Optical Pump Technique
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz.(2024)
Kusano M., Watanabe M.
Controlling heat accumulation through changing time per layer in laser powder bed fusion of nickel-based superalloy
Journal of Manufacturing Processes.131(2024)187-198
Hatakeyama T., Sawada K., Kusano M., Watanabe M.
Significant creep-strength improvement in modified 9Cr-1Mo steel via microstructural control through laser powder bed fusion
Additive Manufacturing.93(2024)104445
Morimoto T., Katoh H., Ishida Y., Hara E., Kusano M., Naito K., Watanabe M., Takagi K., Arai K., Hasegawa K.
Modified double cantilever beam test method for mode-I energy release rate of elastic adhesive layers
Engineering Fracture Mechanics.307(2024)110320
Daram P., Morisada Y., Ogura T., Kusano M., Yu J., Fukuda M., Fujii H., Kuroda S., Watanabe M.
Development of Tungsten Repair Technology by Atmospheric Plasma Spraying of Tungsten and Friction Stir Processing
Journal of Thermal Spray Technology.(2024)
Daram P., Singh A., Hiroto T., Kitashima T., Watanabe M.
Compositionally graded titanium to aluminum processed by laser powder bed fusion process: Microstructure evolution and mechanical properties
Materials Science and Engineering: A.903(2024)146638
Kitashima T., Hiroto T., Jodi D.E., Watanabe M.
Fabricating a single-crystal-like β grain structure of a near-β Ti alloy with unique variant selection by laser powder bed fusion
Materials and Design.243(2024)113039
Katagiri J., Nomoto S., Kusano M., Watanabe M.
Particle Size Effect on Powder Packing Properties and Molten Pool Dimensions in Laser Powder Bed Fusion Simulation
Journal of Manufacturing and Materials Processing.8[2](2024)71
Kitashima T., Hiroto T., Watanabe M.
Numerical analysis of Al2O3 and TiO2 growth and oxygen dissolution in a metal substrate during the isothermal oxidation of an α-Ti alloy at 973 K
Journal of Materials Research and Technology.30(2024)4137-4146
Okugawa M., Saito K., Yoshima H., Sawaizumi K., Nomoto S., Watanabe M., Nakano T., Koizumi Y.
Solute segregation in a rapidly solidified Hastelloy-X Ni-based superalloy during laser powder bed fusion investigated by phase-field and computational thermal-fluid dynamics simulations
Additive Manufacturing.84(2024)104079
Mercer C., Hosoda N.
Analysis of Structure and Function of Ladybird Leg and Subsequent Design and Fabrication of a Simplified Leg Structure for Robotic Applications
Biomimetics.9[3](2024)184
Honda H., Watanabe M.
Quantifying Laser Absorptivity of Ti–6Al–4V Powder through Additive Manufacturing Systems
Materials Transactions.65[2](2024)194-198
Kusano M., Takata Y., Yumoto A., Watanabe M.
Effects of time per layer and part geometry on thermal history and microcracking in the fabrication of nickel superalloy samples by laser powder bed fusion
Additive Manufacturing.80(2024)103987
Kusano M., Watanabe M.
Heat Source Model Development for Thermal Analysis of Laser Powder Bed Fusion Using Bayesian Optimization and Machine Learning
Integrating Materials and Manufacturing Innovation.(2024)
2023年
Zhu J., Briffod F., Shiraiwa T., Enoki M., Emura S.
Kink band formation mechanism in α/β Ti-9Cr two-phase alloy
Journal of Alloys and Compounds.939(2023)168736
Wang Q., Ma N., Huang W., Shi J., Luo X.-T., Tomitaka S., Morooka S., Watanabe M.
Key role of temperature on delamination in solid-state additive manufacturing via supersonic impact
Materials Research Letters.11[9](2023)742-748
Wang Q., Ma N., Chen J., Tomitaka S., Watanabe M.
Microstructure characteristics of warm spray additively manufactured Inconel 718 superalloys and correlation with mechanical performance
Materials Letters.341(2023)134230
Talara M., Bulgarevich D.S., Kobayashi K., Kitahara H., Furuya T., Escano M.C., Watanabe M., Tani M.
Impact of Antenna Metal's Thicknesses and Structures on Terahertz (THz) Wave Generation Performance of Spintronic Emitters
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz.(2023)
Osada T., Koyama T., Bulgarevich D.S., Minamoto S., Osawa M., Watanabe M., Kawagishi K., Demura M.
Virtual heat treatment for γ-γ′ two-phase Ni-Al alloy on the materials Integration system, MInt
Materials and Design.226(2023)111631
Meng L., Kitashima T., Zhao Z., Wei Q., Lin P.
Effect of parent β-texture on α-texture evolution during dynamic precipitation in a continuous forging process of Ti-6Al-4V alloy
Journal of Alloys and Compounds.947(2023)169425
Kuroda T., Masuyama H., Toda Y., Matsunaga T., Ito T., Watanabe M., Ozasa R., Ishimoto T., Nakano T., Shimojo M., Yamabe-Mitarai Y.
Microstructure Evolution and High-Temperature Mechanical Properties of Ti6Al4Nb4Zr Fabricated by Selective Laser Melting
Materials Transactions.64[1](2023)95-103
Katagiri J., Kusano M., Minamoto S., Kitano H., Daimaru K., Tsujii M., Watanabe M.
Melt Pool Shape Evaluation by Single-Track Experiments and Finite-Element Thermal Analysis: Balling and Lack of Fusion Criteria for Generating Process Window of Inconel738LC
Materials.16[4](2023)1729
Jodi D.E., Kitashima T., Singh A., Watanabe M.
High-temperature microstructural stability of pure Ni fabricated by laser powder bed fusion using Gaussian and flat-top beam profiles
Materials Characterization.200(2023)112897
Hatakeyama T., Sawada K., Suzuki M., Watanabe M.
Microstructure development of modified 9Cr-1Mo steel during laser powder bed fusion and heat treatment
Additive Manufacturing.61(2023)103350
Hagiwara M., Kitashima T.
High Cycle Fatigue and Very High Cycle Fatigue of Orthorhombic (O + α 2 )-Type Ti–27.5Nb–13Al Alloy with and without B and Fatigue Striation Analysis in Comparison with (α + β)-Type Titanium Alloys
Materials Transactions.64[1](2023)121-130
Daram P., Hiroto T., Watanabe M.
Microstructure and phase evolution of functionally graded multi-materials of Ni–Ti alloy fabricated by laser powder bed fusion process
Journal of Materials Research and Technology.23(2023)5559-5572
Bulgarevich D.S., Nomoto S., Watanabe M., Demura M.
Crystal plasticity simulations with representative volume element of as-build laser powder bed fusion materials
Scientific Reports.13[1](2023)20372
Zhu J., Briffod F., Shiraiwa T., Enoki M., Emura S.
High-Resolution Digital Image Correlation Analysis of Layered α/β Two-Phase Ti–12Mo Alloy under Compressive Condition
Materials Transactions.64[12](2023)2677-2686
Kitahara H., Ishii K., Talara M., Furuya T., Escano M.C., Tani M., Bulgarevich D.S., He D., Watanabe M.
Improvement in the Detection Efficiency of Terahertz (THz) Time-domain Spectroscopy (TDS) by applying an Alternating Magnetic Field Bias in Spintronic Emitter
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz.(2023)
About us
Additive Manufacturing Group studies on additive manufacturing (3D printer), which has been attracting a lot of interest as a next-generation process technology, and thermal spray processing, which is important for a protective coating of a structural component in harsh environments. The group focuses on heat-resistant materials (Ni-based alloys, Ti alloys, oxide ceramics, etc.) used in jet engines, gas turbines, and other high-temperature energy equipment.
Group research overview
In this group, mainly four research topics have been investigated, (i) 3D additive manufacturing process that directly creates complex three-dimensional structures from raw material powder, (ii) Coating technology to protect structural components from harsh environments, and (iii) Nondestructive evaluation techniques for ensuring reliability of materials.
Research theme
Selective laser Melting
Sukeharu Nomoto, Masahito Segawa, Makoto Watanabe. Non- and Quasi-Equilibrium Multi-Phase Field Methods Coupled with CALPHAD Database for Rapid-Solidification Microstructural Evolution in Laser Powder Bed Additive Manufacturing Condition. Metals. (2021) 626-1-626-21 10.3390/met11040626
KITANO, Houichi, TSUJII, Masakazu, KUSANO, Masahiro, Atsushi Yumoto, WATANABE, Makoto. Effect of plastic strain on the solidification cracking of Hastelloy-X in the selective laser melting process. Additive Manufacturing. (2021) 101742-1-101742-9
Kaita Ito, Masahiro Kusano, Masahiko Demura, Makoto Watanabe. Detection and location of microdefects during selective laser melting by wireless acoustic emission measurement. Additive Manufacturing. 40 (2021) 101915 10.1016/j.addma.2021.101915
Image Segmentation and Analysis for Microstructure and Property Evaluations on Ti–6Al–4V Fabricated by Selective Laser Melting
Spray Coating
Effects of Gun Scanning Pattern on the Structure, Mechanical Properties and Corrosion Resistance of Plasma-Sprayed YSZ Coatings
Effects of amorphous phase on hot corrosion behavior of plasma-sprayed LaMgAl11O19 coating
Non-destructive Evaluation
Evaluation of 3D-Printed titanium alloy using eddy current testing with high-sensitivity magnetic sensor
Terahertz Magneto-Optic Sensor/Imager
Mid-infrared pulsed laser ultrasonic testing for carbon fiber reinforced plastics
Forging
Effect of α precipitation on β texture evolution during β-processed forging in a near-β titanium alloy