Structure and mechanical characteristics of the hypereutectic silumin subjected to pulsed electron beam treatment

16th International Conference of Students and Young Scientists "Prospects of Fundamental Sciences Development"

自然科学（总论）

Petrikova, E.A.^1 ; Teresov, A.D.^1 ; Rygina, M.E.^1^2 ; Ivanov, Yu.F.^1^2

Institute of High Current Electronics, Siberian Branch, Russian Academy of Sciences, 2/3, Akademicheskiy ave., Tomsk

634055, Russia^1

Tomsk Polytechnic University, Lenina ave., 30, Tomsk

634050, Russia^2

关键词: Cell size;    High Speed;    Intense pulsed electron beam;    Irradiation modes;    Mechanical characteristics;    Micropores;    Pulsed electron beams;    Surface layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/597/1/012060/pdf
DOI  :  10.1088/1757-899X/597/1/012060

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

Silumin, aluminum with silicon alloy, is a promising material used for the manufacture of medium-loaded machine parts and mechanisms. High brittleness is one of the main drawbacks of hypereutectic silumin. Modification of a hypereutectic silumin (18-20 wt.% Si) was carried out by irradiating the samples with an intense pulsed electron beam. It was established that irradiation of cast hypoeutectic silumin by an electron beam leads to a significant reduction in the number of micropores, forming a high-speed cellular crystallization structure with a cell size of (0.4-0.6) μm. An irradiation mode allowing to increase the silumin surface layer hardness by more than 4 times, wear resistance - by 1.2 times, to increase ductility by 1.2 times in relation to the initial material was detected (35 J / cm2; 200 μs, 20 imp. 0.3 s-1).