Healing of Fatigue Crack in the Metallic Materials by Heat Treatment

researcher's name
about researcher HOSOI, Atsushi Professor
Faculty of Science and Engineering School of Fundamental Science and Engineering
research field
Materials/Mechanics of materials


● Failure accidents by deterioration of infrastructure 
● Fatigue is the main cause of failures in metallic structures.


● Implementation of fatigue crack healing of 90%
● Implementation of static tensile strength of 75%
● Fatigue crack healing due to elimination of oxide film by vacuum heating, plasticity-induced crack closure and atomic diffusion.


● Healing of crack healing by heating in  vacuum furnace 
● Improvement of long-term reliability and durability of machines and structures
● Reduction of life cycle cost by extending intervals of repair or disposal


● Maintenance for components of infrastructures 
● Repair of high-value-added products such as aircraft engine members


  • Schematic of crack healing mechanism

collaborative researchers

藤田 耕平 , KAWADA, Hiroyuki Professor (Faculty of Science and Engineering School of Fundamental Science and Engineering)

same researcher's seeds

  • Fabrication of carbon nanotube yarn with high functionality
  • Direct Bonding of Dissimilar Materials Having 3D Nanostructured Interfaces
  • Dissimilar Materials Bonding with 3D Nano Interface
  • Development of Test Method for Evaluating Pure Mode Interlaminar Fracture Toughness of Dissimilar Materials
posted: 2017/02/23