Formation of microcraters and hierarchically-organized surface structures in TiNi shape memory alloy irradiated with a low-energy, high-current electron beam

Journal Article · Tue Oct 27 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4932835· OSTI ID:22492567

Meisner, L. L., E-mail: [e-mail]; Meisner, S. N., E-mail: [e-mail] ^[1]; National Research Tomsk State University, Tomsk, 634050 ^[2]; Markov, A. B., E-mail: [e-mail]; Ozur, G. E., E-mail: [e-mail]; Yakovlev, E. V., E-mail: [e-mail] ^[3]; Rotshtein, V. P., E-mail: [e-mail] ^[1]; Tomsk State Pedagogical University, Tomsk, 634050 ^[2]; Gudimova, E. Yu., E-mail: [e-mail] ^[1]

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1. Institute of Strength Physics and Materials Science SB RAS, Tomsk, 634055 (Russian Federation)
2. (Russian Federation)
3. Institute of High Current Electronics SB RAS, Tomsk, 634055 (Russian Federation)

The regularities of surface cratering in TiNi alloy irradiated with a low-energy, high-current electron beam (LEHCEB) in dependence on energy density and number of pulses are studied. LEHCEB processing of TiNi samples was carried out using RITM-SP facility. Energy density E{sub s} was varied from 1 to 5 J/cm{sup 2}, pulse duration was 2.5–3.0 μs, the number of pulses n = 1–128. The dominant role of non-metallic inclusions [mainly, TiC(O)] in the nucleation of microcraters was found. It was revealed that at small number of pulses (n = 2), an increase in energy density leads both to increasing average diameter and density of microcraters. An increase in the number of pulses leads to a monotonic decrease in density of microcraters, and, therefore, that of the proportion of the area occupied by microcraters, as well as a decrease in the surface roughness. The multiple LEHCEB melting of TiNi alloy in crater-free modes enables to form quasi-periodical, hierarchically-organized microsized surface structures.

• OSTI ID: 22492567
• Journal Information: AIP Conference Proceedings, Vol. 1683, Issue 1; Conference: International conference on advanced materials with hierarchical structure for new technologies and reliable structures 2015, Tomsk (Russian Federation), 21-25 Sep 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
36 MATERIALS SCIENCE
ELECTRON BEAMS
ENERGY DENSITY
IRRADIATION
MELTING
NICKEL ALLOYS
PERIODICITY
PULSES
ROUGHNESS
SHAPE MEMORY EFFECT
SURFACES
TITANIUM ALLOYS
TITANIUM CARBIDES