The fcc/hcp Relative Phase Stability in the Fe-Mn-Co System : Martensitic Transformation Temperatures, Assessment of Gibbs Energies and Thermodynamic Calculation of T0 Lines

In this paper the results of a systematic study of the fcc/hcp relative phase stability in the Fe-Mn-Co system are presented, which is based on new, extensive measurements of the martensitic transformation temperatures. The whole range of compositions where the transformation occurs has now been covered. A thermodynamic analysis of the experimental information based on Gibbs energy modelling of the Fe-Mn-Co, Fe-Mn and Fe-Co systems is performed. The T0 temperatures of the Fe-Mn-Co system are established. It is shown how ternary information can be utilized to assess the Gibbs energy function of the hcp phase, which is not stable in the Fe-rich region of the binary Fe-Co system

Analysis of multiple scattering and multiphonon contributions in inelastic neutron scattering experiments

We present a method of analysis of inelastic neutron scattering (INS) experiments aiming at obtaining the density of phonon states in an absolute scale, as well as a reliable value of the mean-square displacement of the atoms. This method requires the measurement of the neutron total cross section of the sample as a function of energy, which provides a normalization condition for the INS experiment, as well as a value of the mean-square displacement. The method is applied in the case of an incoherent neutron scattering system, viz. the Ti\u9652wt.% Zr alloy. The applicability of this method to the study of metal alloys and other systems is discussed