Mein Praesentationsbild - Berlin, 2008.

Wissenschaftsservice - Materialforschung - Dr. Viktor Prieb

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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 120 micrometer.

More: "Investigation of SMA" - collected articles (pdf-file)