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Strain-rate dependent material properties of selective laser melted AlSi10Mg and AlSi3.5Mg2.5

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Published/Copyright: February 13, 2021
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Materials Testing
From the journal Materials Testing Volume 62 Issue 6

Abstract

This paper investigates the mechanical properties of two selective lasermelted aluminum alloys (AlSi10Mg and AlSi3.5Mg2.5) under high strain-rate uniaxial loading. Accelerated tensile tests were performed under various strain-rate decades (.ε = 4.7 × 10-3 up to 250 s-1) to determine the load-speed-specific changes in the mechanical properties. As a result of the primary laser-based shaping process, the microstructure and characteristics change was entirely comparable to the conventional manufacturing of aluminum parts. Based on an ultrafine microstructure, parts achieve high strength along with a brittle fracture behavior. Modifications for applications requiring high ductility (e. g., the crashloaded structural parts of a car body) can be made through specific heat treatment strategies. The experimental results demonstrate that a significant increase in ductility (factors 4-5) with a concurrent decrease in strength can be obtained compared to the as-built state. In high-speed tests, the tensile strength of both alloys rose strain-rate dependently around 10 %, and the elongation at break increased relatively by ≈ 15 % for AlSi10Mg and ≈ 10 % for AlSi3.5Mg2.5.

Keywords: Selective laser melting; aluminum alloys; strain rate sensitivity; mechanical properties; fracture behavior
Published Online: 2021-02-13
Published in Print: 2020-06-01

© 2020 by Walter de Gruyter Berlin/Boston

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  2. Materials Testing
  3. FACHBEITRÄGE
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  5. XRD investigation of the Cu and Mn effects on the oxide scale of hot rolled AISI 304L stainless steel after annealing and shot-blasting
  6. Strain-rate dependent material properties of selective laser melted AlSi10Mg and AlSi3.5Mg2.5
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  8. FACHBEITRÄGE
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https://doi.org/10.3139/120.111518
Keywords for this article
Selective laser melting; aluminum alloys; strain rate sensitivity; mechanical properties; fracture behavior

Articles in the same Issue

  1. CONTENTS
  2. Materials Testing
  3. FACHBEITRÄGE
  4. Systematic approach for the characterization of additive manufactured and injection molded short carbon fiber-reinforced polymers under tensile loading
  5. XRD investigation of the Cu and Mn effects on the oxide scale of hot rolled AISI 304L stainless steel after annealing and shot-blasting
  6. Strain-rate dependent material properties of selective laser melted AlSi10Mg and AlSi3.5Mg2.5
  7. BOOK
  8. FACHBEITRÄGE
  9. Investigation of the influence of heat treatment of cold work steel on coating adhesion under mechanical load between substrate and thin titanium coatings deposited by PVD
  10. Effective hydrogen diffusivities of AISI 304 stainless steel with Ni or Au coating
  11. Mechanical properties of dissimilar Ti-Al resistance spot welds
  12. A physically based material model for the simulation of friction stir welding
  13. Mechanical behavior and failure mechanism of three-dimensional braided composites at different temperatures
  14. Thermoforming behavior of 3D-printed PLA sheets
  15. Experimental investigation of fatigue failure in an ASTM A401 compression spring of a passenger car
  16. Optimum design of automobile components using lattice structures for additive manufacturing
  17. Seagull optimization algorithm for solving real-world design optimization problems
  18. Wear and microstructural properties of coatings on Weldox 700 steel
  19. Kinetic characterization of boride layers formed on AISI 316 stainless steel
  20. BEZUGSQUELLEN
  21. IMPRESSUM
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