F. Hosseini Nasab - Faculty of Materials Engineering, Sahand University of Technology, P.O. Box ۵۱۳۳۵-۱۹۹۶, Tabriz, Iran
S. Hossein Nedjad - Faculty of Materials Engineering, Sahand University of Technology, P.O. Box ۵۱۳۳۵-۱۹۹۶, Tabriz, Iran
M. Movaghar Garabagh - Faculty of Materials Engineering, Sahand University of Technology, P.O. Box ۵۱۳۳۵-۱۹۹۶, Tabriz, Iran

X-ray diffraction peak profile analysis was used to identify changes in the lattice distortions during isothermal aging of Fe-۱۰Ni-۷Mn (wt. %) maraging steel. Integral peak breadths were analyzed using classical Williamson-Hall equation taking the elastic anisotropy into account. It was found that substantial lattice distortions rise during precipitation hardening which depend strongly on the specific Young’s modulus of a given crystallographic direction. After normalizing by elastic stiffness, the magnitude of average lattice distortions increased reasonably in accordance with age hardening.

X-ray diffraction, peak breadth, maraging, Precipitation, lattice strain