Nanoindentation shows uniform local mechanical properties across melt pools and layers produced by selective laser melting of AlSi10Mg alloy

Everitt, Nicola M; Aboulkhair, Nesma T.; Maskery, Ian; Tuck, Christopher; Ashcroft, Ian

Abstract

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.

Citation

Everitt, N. M., Aboulkhair, N. T., Maskery, I., Tuck, C., & Ashcroft, I. (2016). Nanoindentation shows uniform local mechanical properties across melt pools and layers produced by selective laser melting of AlSi10Mg alloy. https://doi.org/10.5185/amlett.2016.6171

• Journal Article Type: Article
• Acceptance Date: Dec 5, 2015
• Publication Date: Jan 12, 2016
• Deposit Date: Jul 25, 2016
• Publicly Available Date: Jul 25, 2016
• Journal: Advanced Materials Letters
• Electronic ISSN: 0976-3961
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 1
• DOI: https://doi.org/10.5185/amlett.2016.6171
• Keywords: Nanoindentation; additive manufacturing; aluminium alloy
• Public URL: https://nottingham-repository.worktribe.com/output/772957
• Publisher URL: https://www.researchgate.net/publication/289229850_Nanoindentation_shows_uniform_local_mechanical_properties_across_melt_pools_and_layers_produced_by_selective_laser_melting_of_AlSi_10Mg_alloy