Notable Technical Inquiry

What are the prominent failure modes (and potential causes) of TBCs used in turbine engines in military aircraft?

DSIAC was asked to collect information and limited distribution reports on the failure modes and causes for failure of TBCs used in military aircraft turbine engines. It was determined that the most likely failure mode is spallation, though other potential modes include high-temperature oxidation, hot corrosion, mechanical distress, solid-state diffusion, and thermomechanical fatigue cracking. Most TBC failure results from dissimilar thermal expansion coefficients between the substrate and coating. A list of limited distribution and publicly available reports from the DTIC…

Voice From The Community

Susan Hamilton

PE, Structural Engineer, U.S. Army Engineering and Support Center Huntsville (CEHNC)

I have worked in explosives safety and explosion effects for the past 16 years. At CEHNC, I work with colleagues across the globe to develop new and innovative solutions to explosives safety issues as well as develop new science-based explosives safety criteria for the U.S. Army and Department of Defense (DoD). Because the field of explosives safety and explosion effects didn’t really exist until 1928, there is still much we don’t know. In order to fill those knowledge gaps, I also participate in research and testing directed at solving specific problems that will directly impact the Warfighter and DoD’s ability to protect our nation while providing safety to our men and women in uniform as well as nearby civilians.

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Three of the Defense Department’s 11 principal directors of modernization within the Office of Defense Research and Engineering discussed quantum science, 5G, and […]

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