Is this project an undergraduate, graduate, or faculty project?
Undergraduate
Project Type
individual
Campus
Daytona Beach
Authors' Class Standing
Sierra Damon, Sophomore
Lead Presenter's Name
Sierra Damon
Lead Presenter's College
DB College of Engineering
Faculty Mentor Name
RAGHAVS3@erau.edu
Abstract
Synchrotron X-ray diffraction method for continuous strain analysis across heterogenous material interface layers The transfer of strain across a material interface is a relevant concept to quantify for numerous aerospace applications that involve coatings applied to substrates of different materials, particularly in the field of high temperature materials. X-ray diffraction (XRD) is a metrology technique capable of resolving strain within an arbitrary material by quantifying the shifts of Bragg peaks with respect to an unstrained sample and has seen increased use due to the capability of XRD to perform in-situ measurements on materials in extreme environments. Since different materials have different sets of Bragg peaks, analyzing strain across multiple materials requires a specialized process to both physically scan across the material interface while collecting XRD data, and to identify material presence and strain within the XRD data while preventing signal overlap that may skew results. The method utilized for this research involved matching the detector data to the specific spectra of the constituent materials to determine material presence and then utilizing this material presence quantification to determine which Bragg peaks should be analyzed for strain analysis within each respective material. By utilizing this method, the strain across a material interface can be reliably quantified by tracking the shift of Bragg peaks compared to an unstressed spectra, allowing for an accurate characterization of the strain induced by various factors, including transfer of external load through a material interface or strain induced by a mismatched thermal expansion coefficient. This characterization allows for analysis and prediction of material layer delamination, a common failure mode for high temperature coatings.
Did this research project receive funding support (Spark, SURF, Research Abroad, Student Internal Grants, Collaborative, Climbing, or Ignite Grants) from the Office of Undergraduate Research?
No
Included in
Synchrotron X-ray diffraction method for continuous strain analysis across heterogenous material interface layers
Synchrotron X-ray diffraction method for continuous strain analysis across heterogenous material interface layers The transfer of strain across a material interface is a relevant concept to quantify for numerous aerospace applications that involve coatings applied to substrates of different materials, particularly in the field of high temperature materials. X-ray diffraction (XRD) is a metrology technique capable of resolving strain within an arbitrary material by quantifying the shifts of Bragg peaks with respect to an unstrained sample and has seen increased use due to the capability of XRD to perform in-situ measurements on materials in extreme environments. Since different materials have different sets of Bragg peaks, analyzing strain across multiple materials requires a specialized process to both physically scan across the material interface while collecting XRD data, and to identify material presence and strain within the XRD data while preventing signal overlap that may skew results. The method utilized for this research involved matching the detector data to the specific spectra of the constituent materials to determine material presence and then utilizing this material presence quantification to determine which Bragg peaks should be analyzed for strain analysis within each respective material. By utilizing this method, the strain across a material interface can be reliably quantified by tracking the shift of Bragg peaks compared to an unstressed spectra, allowing for an accurate characterization of the strain induced by various factors, including transfer of external load through a material interface or strain induced by a mismatched thermal expansion coefficient. This characterization allows for analysis and prediction of material layer delamination, a common failure mode for high temperature coatings.