United States of America as Represented by the Administrator of Nasa

Eric R Burke

Joseph N Zalameda

Robert A Hafley

Christopher S Domack

Phillip A Williams

Frank L Palmieri

Karen M Taminger

Eric I Madaras

Richard E Martin

Tyler B Hudson

Michael R Horne

William J Seufzer

Jeffrey P Seebo

Stanton L DeHaven

Trenton B Abbott

Brian L Taminger

Theresa A Butler

A method of controlling operation of an electron beam gun and wire feeder during deposition of pools of molten matter onto a substrate to form beads upon solidification of the molten matter. The method includes providing a substrate and a wire source. A molten pool of liquid phase metal is formed on the substrate by melting the wire utilizing an electron beam generated by an electron beam gun. The liquid metal solidifies into a solid phase. A controller utilizes data from a sensor to adjust a process perimeter based, at least in part, on data generated by the sensor.

Process control of electron beam wire additive manufacturing

Non-destructive evaluation (NDE) systems and methods are provided for monitoring objects being manufactured during a cure or consolidation process and for detecting defects that occur during the cure or consolidation process or to detect conditions of the process that can lead to the occurrence of defects. Information acquired by the NDE system during the cure or consolidation process can be used to adjust one or more parameters of the process in real-time to prevent defects from occurring or to reduce the number and/or severity of defects that occur during the cure or consolidation process.

Systems and methods for in-situ cure monitoring and defect detection

Systems and methods are provided for the real time inspection of additive manufacturing deposits using infrared thermography. Various embodiments may enable the measurement of material properties and the detection of defects during the additive manufacturing process. Various embodiments may enable the characterization of deposition quality, as well as the detection of deposition defects, such as voids, cracks, disbonds, etc., as a structure is manufactured layer by layer in an additive manufacturing process. Various embodiments may enable quantitative inspection images to be archived and associated with the manufactured structure to document the manufactured structure's structural integrity.

System and method for in-situ characterization and inspection of additive manufacturing deposits using transient infrared thermography

A system for monitoring damage progression in a composite structure includes a load sensor, acoustic emission sensors, a camera, and a monitoring device. The load sensor measures an applied load to the structure. The sensors measure acoustic emission data indicative of possible damage to the structure. The camera captures image data of the structure in a designated portion of the electromagnetic spectrum. The monitoring device executes a method by which the acoustic emission data is synchronously collected with the image data and the applied load. The device automatically maps the acoustic emission data onto the image data to detect an area of damage progression in the composite structure. A failure event in the detected area of damage progression may be predicted using the mapped data, and a control action may be executed in response to the predicted failure event.

System and method for progressive damage monitoring and failure event prediction in a composite structure

A radiation imaging device includes a radiation source and a micro structured detector comprising a material defining a surface that faces the radiation source. The material includes a plurality of discreet cavities having openings in the surface. The detector also includes a plurality of quantum dots disclosed in the cavities. The quantum dots are configured to interact with radiation from the radiation source, and to emit visible photons that indicate the presence of radiation. A digital camera and optics may be used to capture images formed by the detector in response to exposure to radiation.

Device and method of scintillating quantum dots for radiation imaging

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Yorktown, VA, United States of America

Eric R Burke