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In Situ Radiography During Tensile TestsLaboratory system for testing specimens of metal-, ceramic-, and intermetallic-matrix composite materials incorporates both electromechanical tensile-testing subsystem and either of two imaging subsystems that take x-ray photographs of specimens before, during, and after tensile tests. Used to test specimens of reaction-bonded silicon nitride reinforced with silicon carbide fibers (SiC/RBSN) considered for high-temperature service in advanced aircraft turbine engines. Provides data on effects of preexisting flaws (e.g., high-density impurities and local variations of density) on fracture behavior. Accumulated internal damage monitored during loading. X-ray source illuminates specimen in load frame while specimen is pulled. X-ray images on film correlated with stress-vs.-strain data from tensile test.
Document ID
19940000369
Document Type
Other - NASA Tech Brief
Authors
Baaklini, George Y. (NASA Lewis Research Center, Cleveland, OH.)
Bhatt, Ramakrishna T. (Army Aviation Systems Command)
Date Acquired
August 16, 2013
Publication Date
July 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 7
ISSN: 0145-319X
Subject Category
PHYSICAL SCIENCES
Report/Patent Number
LEW-15684
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.