Irradiation of austenitic steel 10Cr12Mn14Ni4AlMo and titanium alloy Ti-Al-V by pulsed streams of fast nitrogen ions and plasma in a dense plasma focus

It is known [2–8] that irradiation of materials by powerful streams of fast ions and hot plasma within different accelerators including the dense plasma focus (DPF) device results in changes of phase and structure states of surface layer (SL) and gives an opportunity to modify its physical, chemical, mechanical and some other characteristics. Main feature of a DPF device that differs it from other irradiation facilities like pulsed plasma guns, injectors, plasma accelerators, fast ion and electron accelerators, is as follows. DPF generates hot plasma jets (plasma temperature is in the range from several hundred eV till several keV) with velocities (2–5) × 107 cm/s produced simultaneously with fast ion and electron streams (energy of electrons and deuterons are in the range from 50 keV up to several MeV). Because the powerful phase of the DPF discharge lasts 10–8...10–7 s, this device is able to irradiate targets with power flux densities of the above types of radiation on the level up to 1010 (for hot plasma), 1012 (for fast ions) and > 1013 W/cm2 (for fast electrons). For high-Z ions energy of them, obtained due to acceleration in a quasi-stationary electrostatic filed induced within the DPF may reach 100 MeV depending on their charge. Unlike to the case of powerful laser beams the above radiation types of DPF produce volumetric action upon surface layers of materials. These facets can be ensured not in one of the above-mentioned devices all together. It means that the DPF device can produce unprecedented changes of structure, phase composition and some other characteristics of the specimens under irradiation. Irradiation of austenitic steel 10Cr12Mn14Ni4AlMo and titanium alloy Ti-Al-V by pulsed streams of fast nitrogen ions and plasma in a dense plasma focus Vladimir A. Gribkov, Valerij N. Pimenov, Vladimir V. Roschupkin, Sergej A. Maslyaev, Elena V. Demina, Mark M. Lyakhovitsky, Aleksandr V. Dubrovsky, Irina P. Sasinovskaya, Maryna Chernyshova, Marek Scholz, Maria L. Crespo, Andres Chicutin, Claudio Tuniz