Open AccessNanoindentation Shows Uniform Local Mechanical Properties Across Melt Pools And Layers Produced By Selective Laser Melting Of AlSi 10Mg Alloy
Author(s) -
Nicola M. Everitt,
Nesma T. Aboulkhair,
Ian Maskery,
Christopher Tuck,
Ian Ashcroft
Publication year - 2016
Publication title -
advanced materials letters
Language(s) - English
Resource type - Journals
eISSN - 0976-397X
pISSN - 0976-3961
DOI - 10.5185/amlett.2016.6171
Subject(s) - nanoindentation , materials science , selective laser melting , alloy , microstructure , substrate (aquarium) , homogeneous , composite material , grain size , layer (electronics) , indentation hardness , metallurgy , physics , oceanography , thermodynamics , geology
Single track and single layer AlSi10Mg has been produced by selective laser melting (SLM) of alloy powder on a AlSi12 cast substrate. The SLM technique produced a cellular-dendritic ultra-fined grained microstructure. Chemical composition mapping and nanoindentation showed higher hardness in the SLM material compared to its cast counterpart. Importantly, although there was some increase of grain size at the edge of melt pools, nanoindentation showed that the hardness (i.e. yield strength) of the material was uniform across overlapping tracks. This is attributed to the very fine grain size and homogeneous distribution of Si throughout the SLM material
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