Microstructure and Microhardness of Piston Alloy Al-10Si-2Cu Irradiated by Pulsed Electron Beam

• Autorzy: Zaguliaev D. , Konovalov S. , Ivanov Y. , Abaturova A. , Leonov A.

Identyfikatory

DOI

10.24425/afe.2020.133336

• Języki publikacji: EN

Abstrakty

EN

The paper presents the research data on structure, phase composition, defect substructure state, and microhardness of surface layers in the piston alloy Al-10wt%Si-2wt%Cu irradiated by an electron beam with various energy densities and pulse times. An important finding to emerge from the study is that the processing by an electron beam with an energy density of 10 J/cm² brings about slight surface melting, whereas a weak thermal impact of an electron beam hardly changes the phase composition. Once an energy density of an electron beam is set 30 J/cm², intermetallic compounds dissolve and numerous micropores arise. Irradiating by an electron beam with an energy density of 50 J/cm², randomly located microcracks are detected on the treated surface with no regard to a pulse time. A structure of high-speed cellular crystallization with cells from 500 to 600 nm forms in the surface layer. A thickness of the modified layer is related to a beam energy density. As a beam energy density goes up, a thickness of a high-speed cellular crystallization layer increases. Atoms of Si, Cu, Ni, as well as a small quantity of Fe and Mg are detected in the surface, in thin layers surrounding crystallization cells. In a layer 60-80 μm below the irradiated surface, in material between high-speed crystallization cells, there are Si atoms and an insignificant number of Cu atoms. An analysis of a deeper material part has shown a structure similar to the as cast alloy. A drop of microhardness – if compared with the as cast material – is reported at an energy density of 10 J/cm² because an energy amount supplied by an electron beam to the alloy surface is insufficient for melting of the material and dissolution of the intermetallic phase. A raise of a beam energy density up to 20-50 J/cm² causes a max increase of microhardness up to 1.13 GPa for 40 J/cm², 50 μs, and up to 1.16 GPa for 40 J/cm², 200 μs.

Słowa kluczowe

EN

piston alloy; surface layers; microstructure; phase composition; microhardness; electron beam treatment

PL

stop tłokowy; warstwa powierzchniowa; mikrostruktura; skład fazowy; mikrotwardość; obróbka warstwą elektronów

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2020
• Tom: Vol. 20, iss. 3
• Strony: 92--98
• Opis fizyczny: Bibliogr. 37 poz., rys.

Twórcy

autor

Zaguliaev D.

• Siberian State Industrial University, Russia

autor

Konovalov S.

• Samara National Research University, Russia

autor

Ivanov Y.

• Russian Academy of Sciences, Siberian Branch, Institute of High Current Electronics, Russia

autor

Abaturova A.

• Siberian State Industrial University, Russia

autor

Leonov A.

• Russian Academy of Sciences, Siberian Branch, Institute of High Current Electronics, Russia

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)