Stacking Faults in a High Nitrogen Face-Centered-Cubic Phase Formed on Nitrogen-Modified Austenitic Stainless Steel

摘要

Effects of stacking faults in a high nitrogen face-centered-cubic phase (γ_N) formed on plasma source ion nitrided 1Cr18Ni9Ti (18-8 type) austenitic stainless steel on peak shift and peak asymmetry of x-ray diffraction were investigated based on Warren's theory and Wagner's method, respectively. The peak shift from peak position of the γ_N phase is ascribed to the deformation faults density α, while the peak asymmetry of the γ_N phase is characterized by deviation of the center of gravity of a peak from the peak maximum (△ C.G.) due to the twin faults density α. The calculated peak positions of x-ray diffraction patterns are consistent with that measured for plasma source ion nitrided 1Cr18Ni9Ti stainless steel.