EBSD和EDS在高速钢中的应用

Using Bruker’s Hysitron PI 88 SEM PicoIndenter equipped with tilt and rotation stages in conjunction with the QUANTAX EBSD system enables a more robust characterization of metallic materials by combining high resolution phase and grain orientation mapping capabilities with targeted nanomechanical property measurements. This combination could also be used to extend the scope of research related to other advanced textured, anisotropic, or multi-phase materials.

In the last decade, the EBSD technique has evolved - thanks to its combination with EDS - from being a tool for texture quantification to a complete microstructure characterization method. It is now more systematically used for quantifying grain size, phase distribution, grain boundary analysis and phase identification. EBSD analysis has become a standard analytical tool in Earth Sciences.

The evolution of texture and microstructure during plastic deformation controls the bulk mechanical properties of virtually all materials used to manufacture engineering components and equipment. SEM based in-situ tensile/ compression testing allows investigating the onset of plastic deformation as well as all intermediate deformation stages. Microstructure and texture evolution can be quantified when combining this technique with EBSD. The quantitative results can then be used for refining the plastic deformation theory as well as for confirming the existing simulation models.

Non-destructive sample analysis with high spatial resolution can be very difficult to accomplish using conventional EDS detectors as sample surface charging, electron beam damage and shading effects by topography are common problems in scanning electron microscopy. The BRUKER XFlash® FlatQUAD silicon drift detector (SDD) overcomes these limitations. The special geometry with an annular arrangement of detector elements offers a very high solid angle [1]. The XFlash® FlatQUAD detector allows the use of ultra-low beam currents and the investigation of samples with complex topography as demonstrated on two meteorite fall samples.