In this chapter, experimental data obtained for the NiTi alloy undergoing phase transition are processed and analyzed to validate the phase transition kinetics model proposed by Raniecki and Lexcellent. Analysis enabled formulation and development of an enhanced model of thermoelastic martensitic phase ...
The kinetics of isothermal martensìtìc nucleation in Co Cr Mo alloy powders is monitored. It is shown that a linear relation exists between the activation energy for martensite formation and the chemical free energy for the f.c.c. → h.c.p. transition. The nucleation kinetics is governed ...
The sensitivity and kinetics can be enhanced when the two competing phases have large electronic structure contrast and the phase change process is diffusionless and martensitic. In this work, we theoretically and computationally illustrate that such a phase transition could occur in the group-IV ...
Next, the 2D SXRD patterns inFig. 4b–gare further analysed, to provide more insights on the transformation kinetics and overall sequence ofα″T→β,a–ω→βandα″M→βtransitions. Based on the grain identification performed on the 2D SXRD pattern at 245 °C (singleβ-phase), as pre...
The kinetics of isothermal martensìtìc nucleation in Co Cr Mo alloy powders is monitored. It is shown that a linear relation exists between the activation energy for martensite formation and the chemical free energy for the f.c.c. → h.c.p. transition. The nucleation kinetics is governed by...
The atomistic study shows strong size effects in thermally induced martensitic phase transformation evolution kinetics of equiatomic NiTi shape memory alloys (SMAs). It is shown that size effects are closely related to the presence of free surfaces; thus, NiTi thin films and nanopillars are studied....
For an approximate model, assuming a nearly flat interface, we show that the phase boundary exhibits a sick-slip behavior in the presence of a heterogeneous environment, thus leading to a transition from viscous kinetics to rate-independent behavior. (© 2008 WILEY-VCH Verlag GmbH & Co. ...
Microscopic description of the kinetics of a martensitic transition in real crystals: bcc-hcp transition in Zr The kinetics of the bcc-hcp transition in Zr in the presence of dislocations is investigated by numerical simulation methods. It is shown that the transiti... YN Gornostyrev,MI Katsne...
A strong cooling rate dependence of martensitic transformation kinetics was observed and the corresponding mechanism was discussed. Moreover, the variation of transition activation energy for a specific martensite fraction was studied to further characterize the martensitic transformation kinetics....
martensitic phase transformationoriented graphiteMeasurement of the histories of shock-induced phase transition of oriented graphite to diamond are reported which show that it occurs in about 10 ns. These results imply that the transformation is martensitic for temperature substantially lower than the ...