OBRABOTKAMETALLOV MATERIAL SCIENCE Том 23 № 3 2021 EQUIPMEN . INSTRUM TS Vol. 7 No. 2 2025 a b c Fig. 10. Variation of heat input values as a function of layer during EBAM of a bimetallic samples with a heterogeneous structure containing 50 wt.% steel in a copper matrix: a – 0.12 C-18 Cr-9 Ni-Ti and M1; b – 0.12 C-18 Cr-9 Ni-Ti and Cu-9 Al-2 Mn; c – 0.09 C-2 Mn-Si and Cu-9 Al-2 Mn a b c Fig. 9. Variation of heat input values as a function of layer during EBAM of a bimetallic samples with a heterogeneous structure containing 25 wt.% steel in a copper matrix: a – 0.12 C-18 Cr-9 Ni-Ti and M1; b – 0.12 C-18 Cr-9 Ni-Ti and Cu-9 Al-2 Mn; c – 0.09 C-2 Mn-Si and Cu-9 Al-2 Mn a linear decline in heat input values is observed from the first layer until the completion of manufacturing. For composites of the AISI 321-Cu-9 Al-2 Mn system with steel contents of 10 wt. %, 25 wt. %, and 50 wt. %, an exponential decline in heat input values is observed with different rates of decrease from the first layer until the completion of manufacturing. For 0.09 C-2 Mn-Si‑Cu-9 Al-2 Mn composites with steel contents of 10 wt. %, 25 wt. %, and 50 wt. %, an exponential decline in heat input values is observed with almost the same rate of decrease from the first layer until the completion of manufacturing. Low heat input values when depositing steel wire are insufficient for complete melting of the filament and lead to areas with unmelted steel wire (Fig. 11, a). High heat input values (from 500 kJ/m) allow complete melting of the iron alloy wire in the melt pool, preventing its overmelting. However, such heat input values increase the penetration depth of the electron а b c Fig. 11. Images of defects (complete melting (a), increased thickness (b) and wire non-melting (c)) during steel wire deposition, resulting from improperly selected parameters for bimetal fabrication using EBAM
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