Non-Destructive Evaluation and Prognostics: Fatigue and Fracture Damage Protection

This Office of Naval Research program focuses on fatigue and damage accumulation of structural metals and alloys, including nanostructured materials. Fatigue focuses on quantifying the damage parameters in terms of ΔK (cyclic damage) and Kmax (static damage), which are key measures of damage in materials. Because damage frequently arises from a combination of mechanical and corrosion effects, these mechanisms are the primary areas of focus in the program, with the goal of a reliable fatigue damage life prediction capability. Because they are important metals to the Navy, there is a focus on aluminum, steel and titanium alloys. In nanostructured alloys, research involves bi-modal and tri-modal microstructures of 5xxx aluminum alloys and their cumulative effects, in order to characterize fracture and fatigue as a function of processing variables. (See also NDE and Prognostics: Advanced Sensors and Technologies)

Applications

  • Structural health monitoring systems
  • Advanced component failure warning (bulkheads, landing gear, wings and ship weld joints)

Program Contact Information

Name: Dr. Ignacio Perez

Title: Program Officer

Department: Code 33

Division: Naval Materials

Email: ignacio.perez1@navy.mil

Address
Office of Naval Research
875 N. Randolph Street
Arlington, Va. 22203

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