$fcc diffraction pattern tem$

In order to distinguish the complicated phases, several methods have been proposed such as X-ray diffraction (XRD), color tint etching and light optical microscopy (LOM) and electron backscattering diffraction (EBSD) based on scanning electron microscopy (SEM). The quantity of each phase has a decisive effect on the mechanical properties, but it’s not easy to quantify. A typical example for complicated phases steels is transformation induced plasticity (TRIP) steels ( De Cooman, 2004 Fischer et al., 2000), which contain austenite, ferrite, bainite, martensite, carbide, etc. The most important issue for understanding the overall properties of the complicated phases steels is to clearly identify the all phases in microstructure. Keywords : Transformation induced plasticity steel, Electron backscatter diffraction, Transmission electron microscopy By determining the threshold values, iron BCC phases were successfully separated. For more precise separation of bainite and martensite, IQ threshold values were determined by a correlative TEM analysis. For instance, these phases have very similar IQ values in many cases, especially in deformed region therefore, even though the IQ value was used, it has been difficult to distinguish the bainite and martensite. However, there are still remaining problems that make the separation of bainite and martensite difficult. IQ values are very useful tools to discern the iron BCC phases because of their different density of crystal defect and lattice distortion. Among the various EBSD-based methodology, image quality (IQ) values, which present the perfection of a crystal lattice, was used to distinguish the iron BCC phases. However, iron BCC phases such as ferrite, bainite and martensite cannot be easily distinguished by EBSD due to their similar surface morphology and crystallographic structure. EBSD is a very powerful microstructure analysis technique at the length scales ranging from tens of nanometers to millimeters. A new method was introduced to distinguish the ferrite, bainite and martensite in transformation induced plasticity (TRIP) steel by using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM).

$fcc diffraction pattern tem$

Fcc diffraction pattern tem