Order Evolution in Iron-Based Alloys Viewed through Amplitude Dependent Damping Studies

Abstract

Amplitude dependent damping and neutron thermo-diffraction studies were performed in Fe-Al-Si, Fe-Al-Cr and Fe-Si alloys. Results show that the behaviour of the strength of the amplitude dependent damping as a function of temperature is a suitable tool for determining the order changes as a function of temperature. A decrease in the order degree leads to an increase in the strength of the amplitude dependent damping, due to the dislocation mobility increases.

Study of damping capacity of Fe–5.4Al–0.05Ti alloy

“…This type of domains can be related to a short range ordering of Al atoms in a-Fe lattice as reported in many papers and denoted at the phase diagram as K1 state [41] and it leads to a decrease in the damping capacity of Fe-based alloys with a bcc structure [12,42,43]. Such an irregular domains configuration and their negative role to the saturation magnetostriction and the damping capacity were also proved in a similar FeeGa alloying system [44].…”

High functional 3D printed PCL/FSMA magnetic composites

“…Furthermore, in CPST samples within the temperature range where the MTRP develops, the movement of the martensite variants in martensitic phase and the movement of martensite/austenite interface during the MT lead to the appearance of ADD effects during the DMA measurements also [23,46,62,63,[84][85][86][87]. In effect, within the temperature interval around 320-335 K, the ADD-effects promoted both from mesostructure and from the MT are superimposed.…”

Evolution of magnetic response as a function of annealing temperature in Fe-based alloys

“…Neutron thermodiffraction studies in as-quenched Fe-6at.% Al-9at.% Si sample, determined the appearance of D0 3 order at room temperature. Above 983 K, the order disappears, as shown by the disappearance of the (1 1 1) and (2 0 0) reflections related to the D0 3 structure, Figure 3 [12,15]. In addition, Neutron thermodiffraction studies for Fe-4at.% Al-8at.% Ge have shown that this alloy is disordered in  phase in the whole explored temperature range, between room temperature and 1300 K, see Figure 4.…”