Researchers from Oxford Instruments and Manchester University reported at MS&T 2019 in Portland that rapid analyses of cracks via EBSD and EDS enable a comprehensive understanding of the dynamics of crack formation and subsequent propagation.
Electron backscatter diffraction (EBSD) and energy dispersive x-ray spectrometry (EDS) are well established characterization tools that have been widely applied to the study of crack formation and propagation. Recent developments in EBSD and EDS detector technology now enable ultra-high-speed analyses of cracks in a wide range of materials, with no compromise in data quality.
In this study we investigate two failed samples using integrated EBSD and EDS. The first sample is a cracked duplex steel, in which high speed and high precision EBSD analyses reveal the complex relationship between phase, grain shape, texture, and localized plastic strain.
The second sample is a cracked high-temperature superalloy, showing the formation of oxide phases on the crack surface and evidence that diffusion plays a key role in crack propagation and subsequent failure. These rapid analyses enable a comprehensive understanding of the dynamics of crack formation and their subsequent propagation.
Title: Crack Propagation in Advanced Materials: Characterizing the Importance of Strain and Chemistry Using EBSD and EDS
Authors: Michael Hjelmstad, Oxford Instruments
Pat Trimby, Ali Gholinia, Phil Withers, Manchester University
https://www.matscitech.org/MST19/TechnicalProgram
