Evaluation of surface/interface quality, microstructure and mechanical properties of hybrid additive-subtractive aluminium parts

Research output: Contribution to journalArticlepeer-review

Abstract

A disadvantage of selective laser melting (SLM) processes for the manufacture of large parts is their slow build time per unit volume. A hybrid route is to generate core simple shapes traditionally, for example by machining, followed by adding final features by SLM. Here the mechanical integrity of such hybrid parts is studied, choosing the building of AlSi10Mg by SLM on a machined AA6082 base, in the shape of a tensile test piece, as a simple example. These materials are chosen for their relevance to lightweight parts. As-built parts fail at the SLM/machined interface but standard heat treatments transfer failures to the machined material. Optimised SLM processing conditions and microstructures of the SLM and interfacial regions are reported.

Details

Original languageEnglish
Pages (from-to)237-240
Number of pages4
JournalCIRP Annals - Manufacturing Technology
Volume68
Issue number1
Early online date15 May 2019
Publication statusE-pub ahead of print - 15 May 2019

Keywords

  • Additive manufacturing, selective laser melting (SLM), aluminium