Dr. V. Prieb
The limiting of the response time of shape memory alloy actuators
by the intrinsic transformation velocity
"MFS-Büro Dr. Prieb"
Report on the Int. Conf.
"Readings on the materials with shape-memory
and superelasticity effects,
24.-25. Mai 2000, Kiew", Kiew, 2000.
Abstract: What limits the frequency of shape memory actuators - the cooling rate
or the transformation velocity? This question is investigated experimentally
and discussed in this paper. The transformation frequency fa
(the action frequency) is determined by the time of a one completely
transformation cycle tc (response time).
It was measured Ti0.5Ni0.5
(B2-B191), Ti0.5Ni0.5-x(Au,Pd,Pt)x (B2-B19),
Ti0.5Ni0.482Alx0.018 (B2-R-B191), Mn0.84Cu0.16
(fcc-fct) poly-crystals and (Cu-Al)-based (B2-9R) single
crystals memory alloys.
The velocity of the single phase boundary (the soliton velocity)
at the transformation of a Cu-Al-Zn single crystal at the indifferent phase equilibrium
and at the strong not equilibrium conditions
(shock induced transformation) was measured too.
More about this in my monograph, published in November 2020:
"The concept of dual-energetic martensite (CODEM) for shape memory phenomena", PDF-file