Selective laser melting 316L/CuSnlO multi-materials: Processing optimization, interfacial characterization and mechanical property
Adopting selective laser melting (SLM), a typical technology of additive manufacturing (AM), to form multi-material metallic composites is a challenging and promising field. In this study, SLM 316 L/CuSnlO multi-material composites was an innovative attempt to develop functional and structural mater...
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Veröffentlicht in: | Journal of materials processing technology 2020-09, Vol.283, p.1 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Adopting selective laser melting (SLM), a typical technology of additive manufacturing (AM), to form multi-material metallic composites is a challenging and promising field. In this study, SLM 316 L/CuSnlO multi-material composites was an innovative attempt to develop functional and structural materials with excellent properties of steel and copper alloys. Dense 316L/CuSnlO specimens with no interfacial macrocracks were successfully fabricated. Results showed that the Vickers microhardness gradually decreased from 329.5 ± 12.5 HV in 316 L region to 172.8IIV ± 7.4 in CuSnlO region. The ultimate tensile strength and flexural strength of 316 L/CuSnlO specimen were between 316 L and CuSnlO. The shear stress of 316 L/CuSnlO sample was 210 MPa, which was higher than the steel/copper alloys fabricated by other methods. It indicated an ideal interfacial bonding condition of 316L/CuSnlO multi-material, which was benefited from sufficient agitation of the molten pools and elements diffusion in the term of continuous distribution of elements and the enrichment of the heterogeneous alloy phases. Also, the grain refinement by re-melting and recrystallization upgraded the bonding performance at the interface. Finally, the 316L/CuSnlO lattice structure was formed by SLM, hinting at the prospects for industrial applications of steel/copper multi-material by SLM in future. |
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ISSN: | 0924-0136 1873-4774 |
DOI: | 10.1016/j.jmatprotec.2020.116701 |