Microstructure evolution and strengthening mechanisms of aluminium alloy A357 manufactured by Selective Laser Melting

Heng Rao, Xinhua Wu, Chris Huw John Davies

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch


The aim of this work is to correlate the effects of Selective Laser Melting (SLM) and special post heat treatment parameters on mechanical properties of the alloy. Since conventional casting and SLM are two completely different techniques, it is not obvious that the postprocessing parameters for heat-treatable aluminium cast alloys can be directly transferred to SLMed alloys. Via the adjustment of SLM parameters, an ultrafine microstructure with submicron-sized Al grains can be obtained, resulting in a comparable or even better mechanical properties with respect to its traditional casting counterparts. With special subsequent heat treatments, nano-sized eutectic Si gets coarsened. Also, the aspect ratio of the Si particles and Al grains in two directions of the SLMed sample is largely diminished heat treatment
Original languageEnglish
Title of host publication17th Australian International Aerospace Congress : AIAC 2017
Subtitle of host publicationMelbourne, Australia, 26-28 February, 2017
Place of PublicationBarton, ACT
PublisherEngineers Australia
Number of pages6
ISBN (Electronic)9781922107855
Publication statusPublished - 2017
EventAustralian International Aerospace Congress 2017 - Melbourne Cricket Ground, Melbourne, Australia
Duration: 26 Feb 201728 Feb 2017
Conference number: 17th


ConferenceAustralian International Aerospace Congress 2017
Abbreviated titleAIAC 2017
Internet address

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