General Research Project which are classified in research categories

Research Division of Materials Joining Process

Dep. of Energy Control of Processing  ( Prof. M. Tanaka ・Assoc.Prof. M. Shigeta ・Assist.Prof. S. Tashiro  )

  1. Generation and control of thermal plasmas, and their application to welding and joining processes
  2. Arc physics, molten pool behavior, and transport theory in fusion welding
  3. Numerical simulation of material processing employing thermal plasmas
  4. Measurement and diagnosis of thermal plasmas
  5. Development of new arc electrodes based on the analysis of electrode-plasma interaction

Dep. of Energy Transfer Dynamics  ( Prof. Y. Setsuhara ・Assoc.Prof. G. Uchida ・Assist.Prof. K. Takenaka  )

  1. Studies on plasma-materials interactions for development of advanced processing technologies
  2. Development of novel plasma sources and particle beams for advanced process technologies (CVD, PVD)
  3. Development of novel large-area, low-damage and high-density plasma sources for advanced process control of functional materials 
  4. Creation of softmaterial processing science for development of advanced green nanotechnologies with inorganic/organic flexible hybrid structures
  5. Studies on temporal and spatial control of discharge for development of innovative plasma sources for plasma medicine

Dep. of Manufacturing Process  ( Prof. M. Nishikawa  )

  1. Development and evaluation of advanced micro joining process
  2. Elucidation of micro joining phenomena and defect suppression
  3. Control and analysis of microstructure at soldered interface
  4. Development of eco-friendly fluxless soldering process using a reducing atmosphere
  5. Formation of high heat-resistance joint using nanomaterials

Dep. of Laser Materials Processing  ( Prof. M. Tsukamoto ・Assoc. Prof. Y. Kawahito  )

  1. Elucidation of beam-material interaction in laser processing and laser processing phenomena
  2. Assessment of laser weldability and joint properties of various materials
  3. In-process monitoring and adaptive control during laser welding
  4. Development of laser-arc hybrid welding technology
  5. Elucidation of defects formation mechanism in laser processing, and development of preventive procedures for defects
  6. Laser joining of dissimilar materials, and laser brazing
  7. Laser repairing and laser prototyping including laser additive manufacturing (LAM)
  8. Elucidation of laser cutting phenomena and development of laser cutting process
  9. Development and evaluation of high efficiency, high productivity and environmental-friendly welding processes
  10. Development and evaluation of joining, welding and cutting processes for the advanced functional materials
  11. Intelligent and optimum system aided by computer simulation for various joining, welding and cutting processes
  12. Creation of new function by surface modification with lasers
  13. Development of additive manufacturing technologies with lasers
  14. Development of functional ceramics with energy beams

Research Division of Materials Joining Mechanism

Dep. of Welding Mechanism  ( Prof. K. Ito ・Prof. Y. Mikami ・Assoc.Prof. M. Takahashi (supplementary assignment)  )

  1. Observation and characterization for weld microstructure and understanding their formation mechanism
  2. Investigation into material science factors controlling mechanical properties of welded parts
  3. Study on phenomena of solid phase bonding from the materials science viewpoint
  4. Microstructure observation, characterization, and control for dissimilar material joining boundary
  5. Development of new functional materials using welding and joining methods
  6. Development of composite synthesis using interface bonding, cladding and FSW methods and understanding their interface bonding mechanism
  7. Evaluation of mechanical properties of joints considering microstructure and material behavior of welds

Dep. of Joint Interface Structure and Formation Mechanism  ( Prof. H. Fujii ・Assoc. Prof. T. Nagira ・Assist.Prof. H. Liu  )

  1. Multivariable analyses of joint properties using Bayesian neural network
  2. Functional assessment of ferrous FSW joints
  3. Functional assessment of non-ferrous FSW joints
  4. Controls of blowhole and microstructure by ultrasonic TIG welding
  5. Development of highly efficient TIG welding
  6. Development of highly efficient GMA welding
  7. Functional assessment of CMT (cold metal transfer) joints
  8. Establishment of surface modification technology for long life usage of structures
  9. Analyses of high temperature wetting phenomena

Dep. of Composite Materials Processing  ( Prof. K. Kondoh ・Assoc. Prof. J. Umeda ・Assist. Prof. K. Shitara  )

  1. Advanced light metal composite via plastic working process
  2. High-performance powder metallurgy materials
  3. Metal matrix composite using un-bundled carbon nanotubes
  4. High-purity amorphous silica materials originated from rice husks
  5. SKPFM analysis on corrosion phenomenon at local interface caused by potential difference
  6. Galvanic corrosion behavior of Mg alloy after electrical irradiation by X-ray

Research Division of Materials Joining Assessment

Dep. of Joining Mechanics and Analyses  ( Prof. N. Ma ・Assoc.Prof. H. Serizawa  )

  1. Development of numerical method for nonlinear problems considering interaction among heat source, material and mechanics
  2. Thermal-mechnical-materials coupling simulation of metallic additivae manufacturing process
  3. Computational modelling of solid-state joining processes of dissimilar materials
  4. Development of Material model and strength evaluation of welded joints
  5. Explicit/implicit hybrid-FEM and analysis of thermal stress & deformation
  6. Field measurement and FEM for investigation of nonlinear mechanical phenomena and failure problems
  7. Measurement of 3D residual stress field based on inherent strain theory and contour method
  8. Safety evaluation of metal forming and welded components
  9. Prediction of crack propagation and fatigure life of welded joints

Dep. of Structural Integrity and Failure Assessments  ( Prof. F. Minami ・Assit.Prof. Y. Takashima  )

  1. Structural integrity assessment of steel structures by the Weibull stress approach
  2. Evaluation of fracture transition from ductile to brittle and subsequent crack growth
  3. Interface strength evaluation for bonded dissimilar materials
  4. Fracture performance assessment under dynamic loading
  5. Investigation of go/no-go of dynamic crack propagation
  6. Influence of strength mismatch and residual stress on fracture strength of welded joints
  7. Fracture toughness testing by small-size specimen
  8. International standardization of fracture toughness correction for constraint loss
  9. Fitness-for-service assessment procedure for welded structures

Dep. of Joining Design and Dependability  ( Prof. F.Minami (supplementary assignment) ・Assoc.Prof. S. Tsutsumi  )

  1. Material modelling for mechanical response of materials
  2. Fatigue life assessment of welded structures
  3. Fatigue crack initiation and propagation analysis
  4. Precision measurement of deformation and crack path
  5. Reliability assessment of welded components and joints
  6. Fatigue life extension techniques by peening
  7. Weldability assessment for high strength steel and fatigued materials

Dep. of Reliability Evaluation and Simulation  ( Prof. H. Inoue ・Assoc.Prof. K. Kadoi ・Assist. Prof. S. Tokita  )

  1. Elucidation of microstructual evolution mecanism during welding of steels
  2. Evaluation of weld hot cracking susceptibility and propeties of dissimilar welds
  3. Investigation of microstructural evolution of grain boudary engineered metals and the properties
  4. Precision evaluation of weld hot cracking susceptibility and investigation of the infuluencing factors
  5. Precision evaluation of corrosion resistance
  6. Development of weldable and high performancce steels
  7. Observation of solidification and transformation behavior during welding process using laser microscope

Smart Processing Research Center

Dep. of Smart Coating Processing  ( Prof. M. Naito ・Assist.Prof. T. Kozawa  )

  1. Structure control and characterization of fine particles and nanoparticles
  2. Research on low temperature fabrication process of nano-structured functional layers
  3. Research on liquid dispersion control of nanoparticles and fabrication process of composite layers
  4. Research on fabrication process of nanoporous materials
  5. Researches on functional fluids and assembling process of nanoparticles

Dep. of Nano/Micro Structure Control  ( Prof. S. Kirihara  )

  1. Three dimensional fabrications of metals and ceramics components by using laser scanning stereolithography
  2. Fine structures creations of metals and ceramics by using micro patterning stereolithography
  3. Micro patterning of metals and ceramics for free surfaces on practical components
  4. Millimeter and terahertz wave controls by using geometric patterns of metals and ceramics.
  5. Three dimensional fabrications of metals, alloys and intermetallics by using micro welding system
  6. Fabrication of functionally graded materials composed of high temperature composite materials by using micro welding system
  7. Functionally cladding of metals and ceramics by using thermal nanoparticles spraying

Dep. of Smart Green Processing  ( Prof. H. Nishikawa(supplementary assignment)  )

  1. Promotion of toxic-free manufacturing of fine pitch high density packaging
  2. Improvement of joint lifetime by controlling microstructures at interface
  3. Nano-particle assisted smart bonding
  4. High reliability of Cu filler conductive adhesive
  5. Low temperature bonding of metallic glasses

Dep. of Life-Innovation Materials Processing  ( Assoc. Prof. H. Abe  )

  1. Development of Reversible Viscoelastic Joining Technology
  2. Development of Self-Organized Synthetic Processing
  3. Development of Soft-Joining Processing
  4. Development of Advanced Assembling of Fine Particles

International Research Center

Global Collaborative Research Center for Computational Welding Science (CCWS)  ( Prof. N.Ma(supplementary assignment) ・Assoc.Prof. H.Serizawa(supplementary assignment)  )

  1. Development of fast computating method for welding problems
  2. Mechanism of welding distortion, residual stress and cracking formations
  3. Construction of inherent strain database for prediction of welding residual stress and distortion
  4. Mechanical welding simulation for real scale structures



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