Electron backscatter diffraction

About: Electron backscatter diffraction is a research topic. Over the lifetime, 15184 publications have been published within this topic receiving 317847 citations. The topic is also known as: EBSD.

X-ray diffraction (XRD) techniques for materials characterization

Abstract: Since the discovery of X-rays at the end of the 19th century and the first works on diffraction of X-rays by crystals, huge developments were achieved in the application of these methods for material characterization. In particular, in the field of materials science and engineering, several applications were developed to become state of the art techniques. This chapter first presents a condensed overview of the production of X-rays as well as of the theory of diffraction of X-rays by crystals. A short survey of the hardware for X-ray diffraction (XRD) measurements is given. The methods of phase analysis, residual stress measurements, and texture investigations of polycrystalline materials are then described with examples, and finally, special methods and future trends are presented.

Misorientation mapping for visualization of plastic deformation via electron back-scattered diffraction.

Abstract: The ability to map plastic deformation around high strain gradient microstructural features is central in studying phenomena such as fatigue and stress corrosion cracking. A method for the visualization of plastic deformation in electron back-scattered diffraction (EBSD) data has been developed and is described in this article. This technique is based on mapping the intragrain misorientation in polycrystalline metals. The algorithm maps the scalar misorientation between a local minimum misorientation reference pixel and every other pixel within an individual grain. A map around the corner of a Vickers indentation in 304 stainless steel was used as a test case. Several algorithms for EBSD mapping were then applied to the deformation distributions around air fatigue and stress corrosion cracks in 304 stainless steel. Using this technique, clear visualization of a deformation zone around high strain gradient microstructural features (crack tips, indentations, etc.) is possible with standard EBSD data.

Deformation induced martensite in an AISI 301LN stainless steel: characterization and influence on pitting corrosion resistance

Abstract: In austenitic stainless steels, plastic deformation can induce martensite formation. The induced martensite is related to the austenite (g) instability at temperatures close or below room temperature. The metastability of austenite stainless steels increases with the decreasing of stacking fault energy (SFE). In this work, the deformation induced martensite was analyzed by X ray diffraction, electron back scatter diffraction (EBSD), magnetic methods and atomic force microscope (AFM) in samples of a low SFE austenitic stainless steel, AISI 301LN and compared with a medium SFE stainless steel, AISI 316L. Both techniques, X ray diffraction and EBSD, presented similar quantities for the a’-martensite. Texture results indicate that the crystallographic orientation of the formed a’-martensite is {001} and {103} . The morphology of a’-martensite was analyzed by AFM. Corrosion tests showed that deformation reduces pitting corrosion and generalized corrosion resistance in both steels.