Abstract
We investigate the effect of pulse flows of hydrogen, helium, and hydrogen–helium plasma of a specific power of 20–30 GW/m2 on the surface structure and mechanical properties of vanadium, niobium, and Kh16N15M3B and Kh18N10T austenitic stainless steels. Plasma bunches acted for 2 μsec with an average energy of particles of ≈ 2 keV. Tests of samples made of austenitic steels for tension showed that irradiation up to doses of ≈ 1018 cm−2 strengthens them by a factor of 1.8 and decreases the relative elongation by a factor of 2.3–2.7. A layer-by-layer electron-microscopic analysis revealed that a cellular structure is formed in the surface layer ≈ 25 μm in thickness as a result of irradiation, which explains the change in mechanical characteristics of the steels.
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