{"66344":{"#nid":"66344","#data":{"type":"event","title":"MSE M.S.  Defense - Ricky Whelchel","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u003C\/strong\u003E\u0026nbsp; Characterization of a Nickel-base\nSuperalloy through Electrical Resistivity-Microstructure Relationships\nFacilitated by Small Angle Scattering\u003Cbr \/\u003E\n\u003Cbr \/\u003E\u003Cstrong\u003E\nAbstract:\u003C\/strong\u003E Nickel-base superalloys are used in the hot sections of gas turbine engines due\nto their excellent high temperature strength and creep resistance. These high\ntemperature mechanical properties are induced in the superalloy engine\ncomponents by forming nanometer scale precipitate phases within the material\nvia heat treatment. The precipitate microstructure continues to evolve with\nthermal exposure, resulting in evolving mechanical properties during service as\nwell as variability during component fabrication. Electrical resistivity\ntesting is sensitive to certain microstructural changes that occur during the\nprecipitation process, such as precipitate nucleation, solute removal, and\nincreases in dislocation density. This project quantifies the effects of the\nprecipitate microstructure on the electrical response of Waspaloy (a\npolycrystalline nickel-base superalloy used in disc rotors) through DC\nelectrical resistivity testing and a variety of volumetric scattering\nexperiments. The microstructural models created in this project could\neventually allow for the electrical resistivity of the material to be used as a\nnon-destructive test for monitoring the precipitate microstructure (and thus\nthe mechanical properties) of the engine components. Such non-destructive\ntesting will be useful for monitoring the mechanical properties of these\ncomponents during service and also for minimizing component variability during\nfabrication.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ETitle:\u0026nbsp; Characterization of a Nickel-base\nSuperalloy through Electrical Resistivity-Microstructure Relationships\nFacilitated by Small Angle Scattering\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"MSE MS Defense - Ricky Whelchel"}],"uid":"27388","created_gmt":"2011-06-01 11:03:43","changed_gmt":"2016-10-08 01:55:03","author":"Bill Miller","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2011-06-03T15:00:00-04:00","event_time_end":"2011-06-03T17:00:00-04:00","event_time_end_last":"2011-06-03T17:00:00-04:00","gmt_time_start":"2011-06-03 19:00:00","gmt_time_end":"2011-06-03 21:00:00","gmt_time_end_last":"2011-06-03 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1238","name":"School of Materials Science and Engineering"}],"categories":[],"keywords":[{"id":"10802","name":"MSE_Interal_Event"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1791","name":"Student sponsored"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}