Investigation of Compressive and Tensile Behavior of Stainless Steel/Dissolvable Aluminum Bimetallic Composites by Finite Element Modeling and Digital Image Correlation

Materials

Hani Henein¹  Abdoul-Aziz Bogno¹  Jing Liu¹  Morteza Ghasri-Khouzani²  Xiuhui Li²  Zengtao Chen²  Ahmed Jawad Qureshi² 

[1] Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada;Department of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada;

关键词: selective laser melting (SLM);    lattice structure;    bimetallic composite;    mechanical properties;    finite element analysis (FEA);    digital image correlation (DIC);   

DOI  :  10.3390/ma14133654

来源: DOAJ

【 摘 要 】

This study reports fabrication, mechanical characterization, and finite element modeling of a novel lattice structure based bimetallic composite comprising 316L stainless steel and a functional 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 dissolvable aluminum, and 316L stainless steel/dissolvable aluminum bimetallic composite is studied. Comparison between experimental, finite element analysis (FEA), and digital image correlation (DIC) results are also investigated in this study. There is no notable difference in the tensile behavior of the lattice and bimetallic composite because of the weak bonding in the interface between the two constituents of the bimetallic composite, limiting load transfer 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 ultimate stress than the lattice and composite in both tension and compression tests, but much less elongation. Moreover, FEA and DIC have been demonstrated to be effective and efficient methods to simulate, analyze, and verify the experimental results through juxtaposing curves on the plots and comparing strains of critical points by checking contour plots.

【 授权许可】

Unknown