Structure modifications and mechanical properties of alloys exposed to pulsed ion beams

Pogrebnjak, A.D.; Ligachev, A. E.; Nesmelov, A. V.; Nesterenko, V. P.; Puchkareva, L. N.; Pirogov, V. N.; Ремнев, Г. Е.; Isakov, I.F.; Ruzimov, Sh. M.

doi:10.1080/00337578708222910

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…, where ε ab (ρ 1 )-is the pair correlation parameter for the nearest atoms Fe (a) and Mn (b)), and z 1 -is the coordination number of the 1st coordination sphere in the bcc lattice. As noted in [24],…”

Section: Resultsmentioning

confidence: 80%

“…, where ε 𝑎𝑏 (ρ 1 ) -is th correlation parameter for the nearest atoms Fe (a) and Mn (b)), and 𝑧 1 -is the coord number of the 1st coordination sphere in the bcc lattice. As noted in [24], The approximation of single-phase Mössbauer spectra (100% of α-phase) was out using a physical model [37,39], within which the intensities of all sextets of line α1) are completely determined by only one parameter α1 (due to the weak influ the second coordination sphere, and the model [37,39] is easily simplified to ta account only the 1st sphere):…”

Section: Resultsmentioning

confidence: 99%

“…In [2,[4][5][6][7][8], impressive processes of structural-phase transformations with the formation of strongly nonequilibrium states were recorded. There are a large number of examples of the formation of nonequilibrium highly defect states under the action of continuous and powerful pulsed ion beams [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In works [1,3,[27][28][29][30][31][32], reverse processes of instantaneous rearrangement of nonequilibrium (metastable) media during ion bombardment at anomalously low temperatures with the transition of these media to states approaching equilibrium as much as possible were found.…”

Section: Introductionmentioning

confidence: 99%

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Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions

Ovchinnikov

Makarov

Gushchina

2021

Metals

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The effect of high-pressure torsion (HPT) (P = 8 GPa, e = 5.9) and irradiation with continuous beams of Ar+ ions with energy E = 15 keV on the atomic structure and phase composition of initially quenched iron alloys with 4.10 and 7.25 at.% Mn was studied by the method of Mössbauer spectroscopy. The supersaturated α-solid solution of Fe-7.25 at.% Mn, in contrast to the stable Fe-4.10 at.% Mn, which passes into a highly nonequilibrium metastable state as a result of HPT deformation, is transformed under the influence of ion irradiation at an abnormally low temperature of 280 °C into a two-phase α + γ-state with a highly enriched γ-phase (austenite) (38.4 at.% Mn) and a depleted α-solid solution with 5.76 at.% Mn. The rapid processes with the formation of the γ-phase with a concentration of Mn close to the extrapolation estimate using the equilibrium phase diagram are explained by the cascade radiation shaking of the material by post-cascade powerful elastic and shock waves. Cascade radiation shaking plays the role of temperature and opens up the possibility of achieving states close to equilibrium in the absence of thermally activated processes at record low temperatures.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions

Ovchinnikov

Makarov

Gushchina

2021

Metals

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“…High Intensity Pulsed Ion Beam (HIPIB) combines ion beam effect and thermal effect with achieving high energy density deposition (10 6 -10 11 W/cm 2 ) on the material surface instantly (≤1 μs), causing rapid heating (10 8 -10 11 K/s) and cooling (10 8 -10 9 K/s) [23,24]. The strong thermal effect can lead to melting, evaporation and ablation of the material surface, and also the formation of non-equilibrium phases [25,26]. In addition, the rapid temperature variation generates shock wave and high thermal stress, resulting in severe irradiation damage (e.g., cracking, spalling, etc.…”

Section: Introductionmentioning

confidence: 99%

Study on thermal shock irradiation resistance of CoCrFeMnNi high entropy alloy by high intensity pulsed ion beam

Zhang

et al. 2022

Journal of Nuclear Materials

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In recent years, high entropy alloys (HEAs) have attracted significant attention due to their excellent physical, chemical, mechanical properties, and good irradiation resistance, thus are considered as potential candidates for fission and fusion structural applications. CoCrFeMnNi HEA was irradiated by high intensity pulsed ion beam (HIPIB) to investigate the effects of thermal shock irradiation on its microstructure, surface morphology and mechanical properties. It was found that CoCrFeMnNi HEA maintained the face-centered cubic single-phase structure after HIPIB irradiation. The ion beam effect of irradiation produced numerous defects such as vacancies and stacking faults within the range of carbon ions. While the thermal effect reduced vacancy concentration beyond the ion range by promoting the recombination of vacancies with interstitials, and decreased the nano-hardness of CoCrFeMnNi HEA. The thermal effect and shock wave effect promoted the migration of vacancies and formed defects such as stacking faults etc. far beyond the ion range in CoCrFeMnNi HEA. Because of the very compositional complexity, the high-level chemical disorder and local lattice distortion of CoCrFeMnNi HEA, the lattice parameter was almost unchanged after HIPIB irradiation. Even if the temperature reached the melting point of CoCrFeMnNi HEA, there was no crack on the surface after surface remelting and rapid cooling. CoCrFeMnNi HEA showed good thermal stability and thermal shock irradiation resistance..

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“…The structural phase transformations which occur in metals and alloys under the action of highintensity pulsed beams (HIPB) of the charged and neutral particles (electrons and ions), as well as the plasma and laser irradiation have been studied for over thirty years. Nevertheless, the mechanism of formation of topography on the surface and of the defects in the near-surface layer of fusible nonferrous materials after the HIPB action is still incomprehensible [1][2][3][4][5]. It especially concerns such metals as aluminum and magnesium.…”

Section: Introductionmentioning

confidence: 99%

The change in the surface topography of magnesium under high-flux C ion irradiation

Potyomkin

Ligachev

Жидков

et al. 2015

J. Phys.: Conf. Ser.

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Structure modifications and mechanical properties of alloys exposed to pulsed ion beams

Cited by 11 publications

References 6 publications

Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions

Structural-and-Phase Transformations in Fe-4.10 and 7.25 at.% Mn Alloys under Intensity External Actions

Study on thermal shock irradiation resistance of CoCrFeMnNi high entropy alloy by high intensity pulsed ion beam

The change in the surface topography of magnesium under high-flux C ion irradiation

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