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Investigation of Compressive and Tensile Behavior of Stainless Steel/Dissolvable Aluminum Bimetallic Composites by Finite Element Modelling and Digital Image Correlation
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- Author(s) / Creator(s)
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This study reports fabrication, mechanical characterization, and finite element modeling of a novel lattice structure based bimetallic composite comprised of 316L stainless steel and a func-tional dissolvable aluminum alloy. A net-shaped 316L stainless steel lattice structure composed of diamond unit cells was fabricated by selective laser melting (SLM). The cavities in the lattice structure were then filled through vacuum-assisted melt infiltration to form the bimetallic composite. The bulk aluminum sample was also cast using the same casting parameters for comparison. The compressive and tensile behavior of 316L stainless steel lattice, bulk dissolva-ble aluminum, and 316L stainless steel/dissolvable aluminum bimetallic composite and the comparison between experimental, finite element analysis (FEA) and digital image correlation (DIC) results, were investigated in this study. There is no notable difference in the tensile be-havior of the lattice and bimetallic composite because of the weak bonding in the interface, so the load cannot be transferred from the 316L stainless steel lattice to the dissolvable aluminum matrix. However, the aluminum matrix is vital in the compressive behavior of the bimetallic composite. The dissolvable aluminum showed higher Young's modulus, yield stress, and ulti-mate stress than the lattice and composite in both tension and compression tests, but much less elongation. Moreover, FEA and DIC have demonstrated to be effective and efficient methods to simulate, analyze, and verify the experimental results through juxtaposing curves on the plots and compare strains of critical points by checking contour plots, respectively.
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- Date created
- 2021-01-01
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- Type of Item
- Article (Published)