Design, Inspection, and Testing of As-Built and Infiltrated Additively Manufactured Aluminum Lattice Truss Structures

Abstract

Lightweight aluminum-alloy lattice truss structures were designed for optimized compressive strength and additively manufactured using the direct metal laser-sintering technique. A number of the trusses were infiltrated with a low-temperature solidified ceramic and a geopolymer formulation, both environmentally favorable alternatives to Portland cement. Some trusses were infiltrated with dicyclopentadiene for comparison. Micro-computed tomography inspection was performed prior to compression testing and detected microcracks in both the fill materials and actual trusses as well as porosity within the fill materials. This information was useful in predicting the comparative compressive strength of the infiltrated trusses.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2022
Accession Number
AD1177016

Entities

People

  • Corey Dickman
  • Jennifer M. Sietins
  • Ken Meinert
  • Marc S. Pepi
  • Mengxuan Zhao
  • Mingling Tao
  • Paul Moy
  • Ray Wildman
  • Rich Martukanitz
  • Rik Riman
  • Vincent Wu

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Additive Manufacturing
  • Alloys
  • Aluminum Alloys
  • Composite Materials
  • Compressive Strength
  • Construction
  • Construction Materials
  • Fabrication
  • Failure Mode And Effect Analysis
  • Heat Treatment
  • Low Temperature
  • Manufacturing
  • Materials
  • Materials Processing
  • Mechanical Properties
  • Mechanical Working
  • Portland Cement
  • Selective Laser Sintering
  • Topology Optimization
  • Two Dimensional
  • X-Ray Computed Tomography

Fields of Study

  • Materials science

Readers

  • Hydraulic Engineering.
  • Reinforced Composite Materials
  • Structural Dynamics.

Technology Areas

  • Directed Energy