Damage-tolerant metallic composites via melt infiltration of additively manufactured preforms

Pawlowski, Alexander E.; Cordero, Zachary C.; French, Matthew R.; Muth, Thomas R.; Carver, Keith; Dinwiddie, Ralph B.; Elliott, Amy M.; Shyam, Amit; Splitter, Derek

doi:10.1016/j.matdes.2017.04.072

Cited by 45 publications

(10 citation statements)

References 34 publications

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“…This latticed composite contains two parts, namely the lattice and the matrix, in which another material is filled into the lattice gaps. There is also much research on the microstructure and mechanical properties of bimetallic lattice structures manufactured by SLM, such as CuSn/18Ni300 bimetallic porous structures [47], and A356/316L interpenetrating phase composites [48,49], in which [49] investigated the mechanical properties of PrintCast composites through finite element analysis (FEA), coupled with digital image correlation (DIC) to capture the deformation and failure processes.…”

Section: Introductionmentioning

confidence: 99%

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

Ghasri-Khouzani

Bogno

et al. 2021

Materials

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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.

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Section: Introductionmentioning

confidence: 99%

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

Ghasri-Khouzani

Bogno

et al. 2021

Materials

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“…Lattice structures have also been used to create locally variable material properties by modifying the relative density of a part and creating site-specific stiffness and yield strength [2,5,11]. This has also been taken one step further to include creation of printed lattice preforms to reinforce cast metal components [12].…”

Section: Functionality Performance and Parts Consolidationmentioning

confidence: 99%

Design approaches for additive manufactured components, with a focus on selective laser melting

Komi¹,

Kokkonen²

2017

RakMek

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Summary. Additive manufacturing (AM) of metal components is characterized by the joining of material particles or feedstock to make parts described by 3D model data in typically a layer by layer fashion. These modern and constantly improving manufacturing techniques inherently allow far more geometric freedom than traditional "subtractive" manufacturing processes, and thus necessitate novel approaches to component design. Careful utilization of this geometric freedom can be translated into products characterized by improved functionality and performance, simplified assemblies, are customizable, and/or lightweight. This paper provides a brief overview design approaches, manufacturing limitations, and available tools for successful design of additive manufactured components, with special attention paid to the selective laser melting (SLM) approach.

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“…Fundamental to all assembled systems, contact mechanics is integral to mechanical design. This is evident in various material processes and engineering applications, such as hardness measurement [1,2], particle and powder interactions [3,4], particle erosion [5], thermal spray [6][7][8], electrical contact [9][10][11], biomechanics [12][13][14][15] and additive manufacturing [16,17]. Surface curvature or roughness often causes the extremely small contact area, resulting highly local deformation and stress concentrations.…”

Section: Introductionmentioning

confidence: 99%

Unloading Behavior of Elastic-power-law Strain Hardening Materials Indented by Elastic Indenter

Chen¹,

Wang²,

Wang³

et al. 2021

Preprint

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Both strain hardening and indenter elastic deformation usually cannot be neglected in engineering contacts. By the finite element (FE) method, this paper investigates the unloading behavior of elastic-power-law strain-hardening half-space frictionlessly indented by elastic sphere for systematic materials. The effects of strain hardening and indenter elasticity on the unloading curve, cavity profile during unloading and residual indentation are analyzed. The unloading curve is observed to follow a power-law relationship, whose exponent is sensitive to strain hardening but independent upon indenter elastic deformation. Based on the power-law relationship of the unloading curve and the expression of the residual indentation fitted from the FE data, an explicit theoretical unloading law is developed. Its suitability is validated numerically and experimentally by strain hardening materials contacted by elastic indenter or rigid flat.

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Damage-tolerant metallic composites via melt infiltration of additively manufactured preforms

Cited by 45 publications

References 34 publications

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

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

Design approaches for additive manufactured components, with a focus on selective laser melting

Unloading Behavior of Elastic-power-law Strain Hardening Materials Indented by Elastic Indenter

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