Effect of Solute Carbon on the Evaluation of Dislocation Density in as Quenched Martensite by X-ray Diffraction

X-ray diffraction analysis is one of powerful tools on the dislocation and this method can be applied reasonably for many metals with isotropic crystal structure such as bcc fcc. In study, modified Williamson-Hall was martensitic steels containing 0.006 – 0.26 mass% carbon proved that value density increases increasing content. However, solute have bct characterized by different lattice constants a-axis c-axis. With carbon, shrinks but c-axis elongated. This leads to peak séparation in an causes increase full-width at half-maximum (FWHM) peak. suggests over estimated due effect separation quenched carbon. It found increment apparent Δρ’ expressed following equation a function amount (mass%C), independent values true screw component dislocation.