Available Technology

System for Repairing Cracks in Structures

Thermally Activated Crack Healing Mechanism for Metallic Materials
The metal structure is coated with a low-temperature healing agent and when a crack is produced under cyclic load it is then subjected to an external heat source (to heat the healing film to 250F - 300F). The component is processed in a vacuum. The coating has been prototyped on a titanium alloy sheet with an indium-tin eutectic alloy coating. Development is ongoing to produce a coating that does not require a vacuum and utilizes an integrated heat source.
Patent Abstract: 
NASA Langley Research Center has developed an innovative coating to heal cracks in metal components, such as in aircraft and bridges. Currently the coating is used for in-laboratory repairs of surface cracks. Development continues with the ultimate goal of an in-situ healing mechanism that can work autonomously with structural health monitoring detectors.
Benefits 

Heals cracks in metals

applications 

Aerospace

Transportation Infrastructure

Reps: 
Patent Number: 
8,347,479
Internal Laboratory Ref #: 
LAR-TOPS-130
Patent Status: 
Patent Issue Date: 
September 21, 2015
Agency
NASA
State: 
Virginia
Phone: 
757-864-3346
Lab Representatives
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