Thermodynamic properties of h.c.p. iron and iron-ruthenium alloys

Driving force for γ→ε martensitic transformation and stacking fault energy of γ in Fe-Mn binary system

“…A s (K) ϭ 552.6 Ϫ 5.0 (wt pct Mn) [6] This means that the T 0 temperatures measured by Ishida and Nishizawa [18] are also high because the T 0 temperature is In order to obtain the new ⌬⍀ ␥→ FeMn , we assumed that ⌬⍀ ␥→ FeMn is one order equation of Mn content and adjusted almost equal to the average value of M s and A s temperatures [2] and also indicates that the ⌬⍀ ␥→ FeMn proposed by Ishida and the coefficients to agree with experimental T 0 temperatures, as in Ishida and Nishizawa's work. [18] The T 0 temperatures were calculated by putting the M s and the A s temperatures in Figures 2 and 3 into the following equation proposed by Kaufman and Cohen: [2] Figure 4 shows the variation of the experimental T 0 temperature with Mn content.…”

“…In the present study, the regular solution model proposed The driving force for ␥ → martensitic transformation by Ishida [9] is reexamined on the basis of a number of experiin iron-based alloys has been scarcely investigated except mental data of the martensitic transformation temperatures in Fe-Ru [6] and Fe-Mn [7] alloys because of the limitations (M s and A s ), which have been reported since his work. Both of chemical compositions and the alloy systems in which the driving force for ␥ → martensitic transformation and ␥ → martensitic transformation can occur.…”

The standard enthalpies of formation of binary intermetallic compounds of some late 4d and 5d transition metals by high temperature direct synthesis calorimetry

“…1 we show the enthalpies of formation for alloys of Ru with 3d, 4d and 5d transition metals against the atomic number of the metal. We cite measurements by Guo and Kleppa [1], by Meschel and Kleppa [3,4], by Stepakoff and Kaufman [34], by Brewer and Lamoreaux [15] by Selhaoui and Kleppa [35] and by Topor and Kleppa [37]. In Fig.…”

A study of thermodynamic properties of dilute Fe-Ru alloys by 57Fe Mössbauer spectroscopy

“…The value of H FeRu is presented in Table 2 together with corresponding values derived from calorimetric experiments [17] as well as calculated using the cellular atomic model of alloys developed by Miedema [13].…”

“…According to our knowledge in the available literature there is no experimental data concerning the short-range order in Fe-Ru alloys. Moreover, the values of enthalpy of solution of Ru in Fe were estimated only for liquid phase at 2700 K and for γ -Fe matrix at 1600 K [17].…”