Dr. V. Prieb
FORMATION OF NON-EQUILIBRIUM STRUCTURES IN METAL ALLOYS
UNDER HIGH INTENSITY ELECTRON BEAMS AND
METROLOGY OF THESE BEAMS WITH A HELP OF MEMORY ALLOY TARGETS
V. Prieb, "1st Memory alloys GmbH", Berlin, Germany
(Proc. of the 2nd Int. Conf. "Radiation-thermal defects and Processes in inorganic materials, 14-19 August 2000, Tomsk", Tomsk, 2000, p.p. 10-13, Engl.)
Abstract: Targets made of eutectic alloy Ni60Nb40,
the austenitic homogenous alloy Fe-13wt%Mn and intermetallic equiatomic compound NiTi
after the standard heat treatment with memory
properties are irradiated with electron beams and investigated.
Electron mono-impulse beams with the time length
50x10-9 s, the maximum current density 103 Axcm2
and the initial energy up to 250 keV have been used for the treatment of
the target surface. The structure of irradiated and deformed (NiTi) specimens
is investigated with a help of X-ray diffractometry.
It was found that during the
irradiation can take place dynamic diffusion or a shear (martensitic)
transformation between phases in the non-equilibrium state or the formation of
new non-equilibrium phase.
Irradiated NiTi-sample allows to measure
the tensile-compression wave in the thin surface sheet with the length about
"Investigation of SMA" - collected articles (pdf-file)