Mechanical Properties of Selective Laser-Melted Components of AlSi10Mg for Prototype Vehicles

Christoph Egger*, Florian Grünbart, Zahra Silvayeh, Olga Sulcová, Christoph Seper, Tanja Pfeifer, Christof Sommitsch, Josef Domitner

*Corresponding author for this work

Research output: Contribution to journalConference article

Abstract

Fabrication of aluminum alloy components by traditional high-pressure die casting (HPDC) requires cost- and time-consuming tooling of steel dies, which makes HPDC uneconomic for producing low-volume components or prototypes. In comparison, powder bed-based additive manufacturing, e.g. selective laser melting (SLM), enables rapid prototyping and production of even complex-shaped components directly from computer-aided design models without needing expensive tools. However, SLM prototype components must have almost identical mechanical properties to HPDC serial components in order to emulate their functionality under different load conditions. In this work uniaxial tensile properties of cast alloy AlSi10MnMg (EN AC-43500) in condition T7, i.e. with 120-170 MPa yield stress, 200-240 MPa tensile strength and 9-12 % strain at fracture, shall be attained using selective laser melting of powder alloy AlSi10Mg (EN AC-43000). These properties were achieved by tailored heat treatment. Furthermore, the effect of hot isostatic pressing (HIP) was investigated. The results of the tensile tests confirmed the basic feasibility of substituting HPDC components with SLM components for prototyping. In particular, similar tensile strength and uniform strain were achieved for SLM samples in condition O, i.e. for SLM samples which were only annealed.

Original languageEnglish
Pages (from-to)399-406
JournalMaterials Science Forum
Volume1016
DOIs
Publication statusPublished - 1 Jan 2021
EventTHERMEC' 2021 - Virtual Program, Virtuell, Austria
Duration: 1 Jun 20215 Jun 2021

Keywords

  • Aluminum alloy
  • Heat treatment
  • HPDC
  • Mechanical properties
  • Prototyping
  • SLM

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science(all)

Fields of Expertise

  • Mobility & Production

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