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Abstract |
| The current proposal is an integral part of the Heavy Vehicle Propulsion Materials (HVPM) program at Oak Ridge National Laboratories on "Mechanical Behavior of Ceramic Materials for Heavy Duty Diesel Engines". The proposal aims to establish the relationship between the subsurface damage in ceramics and its influence on the mechanical strength. Several candidate structural ceramics (such as zirconias, silicon nitrides, silicon carbides, etc.) that are of interest to HVPM program will serve as critical materials in our test matrices. Towards this end, the Michigan Tech researchers will conduct well-coordinated experimental and theoretical study that will try to establish the relationship between the subsurface damage in a machined ceramic and its residual strength. The work plan consists of conducting well-defined experiments that can impart controlled damage in a ceramic workpiece (mimicking the damage induced due to surface grinding or machining of ceramic components), characterization of the induced subsurface damage (using optical coherent tomography (OCT) in collaboration with Naval Research Laboratory, evaluation of the influence of this damage on flexural strength of machined bend bars and finally, develop models that can provide more insight into the relationship between induced damage and strength under more complex environments such as in Heavy Duty Diesel Engines (HDDE) where the potential utility of these ceramics is expected to increase in near future.
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Discipline |
Keywords |
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Heavy Vehicle Propulsion Materials, HVPM, Ceramic Materials, Heavy Duty Diesel Engines
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