NASA Langley Research Center, Technology Applications Group, MS 200 Hampton, VA. 23681-0001

66 -- DETECTION OF FATIGUE CRACKS AT RIVETS AND CHARACTERIZATION OF FLAWS IN METAL TUBING POC Dr. Min Namkung (757) 864-4792. The purpose of this notice is to inform potential participants of an upcoming NASA technology forum. NASA Langley Research Center's Nondestructive Evaluation Sciences Branch (NESB) has developed a Flux-Focusing Eddy Current Sensor and Rotating Probe Method for Flaw Detection (LAR-15231-1). This instrument represents a marked advance in the detection of fatigue cracks around rivet heads. In addition, the NESB has developed a Radially Focused Eddy Current Sensor for Characterization of Flaws in Metallic Tubing (LAR 15330-1). The probe has been successfully used to detect cracks in welded joints between steel tubes and other structures. The design enables the probe to be placed axisymmetrically into a tube to detect longitudinal fatigue cracks and flaws. The probe induces eddy currents in the tube walls and the pickup coil is fixed slightly below and at 90 degrees so that its axis is normal to the tube wall. A significant advantage of this technology is that the probe is relatively insensitive to circumferential discontinuities, such a butt joints or weld beads. This notice announces NASA's desire to enter into a licensing agreement (or joint research and development agreement) with the private sector to commercialize existing proprietary technology. Accordingly, a workshop will be held on October 24, 1996 at NASA Langley Research Center in Hampton, VA. Langley researchers will be on hand to discuss the technology and demonstrate its operating characteristics. The technology will be made available to the participant(s) in accordance with NASA's Patent Licensing Regulations. Interested manufacturers should submit an expression of interest and a statement of qualification, including: technical experience and competence in eddy-current technologies, related manufacturing capabilities, previous experience in commercializing similar products, marketing skills (i.e., resources and ability to reach targeted markets), and the financial condition of the firm. This synopsis is for information and planning purposes only and is not to be construed as a commitment by NASA, nor will NASA pay for the information solicited. Respondents will not automatically be notified of the results of the evaluation, but those deemed fully qualified will be considered in any resulting solicitation for the requirement. This is not an announcement of an Request For Proposals. Expressions of interest should be submitted within 30 days after publication of this announcement. Requests for additional technical information should be directed to Dr. Min Namkung at 757-864-4792. All licensing questions should be directed to Rosemary R. Baize at 757-864-7717. In responding reference SS265. (0233)

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