摘要 :
This paper provides an overview of some common nondestructive evaluation (NDE) methods and several examples for the use of different NDE techniques throughout the life cycle of a product. NDE techniques are being used to help dete...
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This paper provides an overview of some common nondestructive evaluation (NDE) methods and several examples for the use of different NDE techniques throughout the life cycle of a product. NDE techniques are being used to help determine material properties, design new implants, extend the service life of aircraft, and help dispose of radioactive waste in a safe manner. The NDE community needs to work more closely with end users in the life cycle of a product to better incorporate NDE techniques. The NDE community needs to highlight the importance of NDE in the entire life-cycle process of a product by showing real costs savings to the manufacturing community.
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摘要 :
The X-ray tomographic microscope (XTM) is a non-invasive X-ray imaging instrument for characterizing a material's structure three-dimensionally with microscopic spatial resolution. The authors have designed a servomechanical load ...
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The X-ray tomographic microscope (XTM) is a non-invasive X-ray imaging instrument for characterizing a material's structure three-dimensionally with microscopic spatial resolution. The authors have designed a servomechanical load frame for use with the XTM which will allow imaging of samples under load. The load frame is capable of generating tensile or compressive forces up to 15.6 kN with a design system stiffness of 8.76 (x) 10(sup 8) N/m. The test specimen can be rotated through 360(degree), without induced bending or torque. Torqueless motion is accomplished by synchronously rotating the grips on precision bearings with an accuracy of 0.01(degree). With this load frame it will be possible, for the first time, to image the initiation and accumulation of internal damage (0.5 (mu)m detectability) formed in a 6 mm diameter specimen during the application of a monotonic or low frequency cyclic load. This is accomplished by interrupting the test and maintaining a fixed load (or displacement) during the non-invasive XTM data collection procedure. This paper describes the in situ load frame design and experimental capabilities. This system can be used to enhance the understanding of failure in composite materials.
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摘要 :
This is the fourth in a series of annual reports describing the technical activities of the nondestructive evaluation program at the National Bureau of Standards.
摘要 :
Topics discussed include: high-pressure diamond cell work; x-ray fluorescence analysis; shroud of turin; laser fusion target inspection; and scanning electron microscope. Organization charts for the M-1 group are included. (ERA ci...
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Topics discussed include: high-pressure diamond cell work; x-ray fluorescence analysis; shroud of turin; laser fusion target inspection; and scanning electron microscope. Organization charts for the M-1 group are included. (ERA citation 05:008990)
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