Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 739, Issue -, Pages 295-300Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.10.055
Keywords
Direct metal laser sintering (DMLS); Additive manufacturing; Transmission electron microscopy (TEM); Strengthening mechanism
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2016-04221]
- New Brunswick Innovation Foundation (NBIF) [RIF2017-071]
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Microstructure of deformed DMLS-AlSi10Mg under quasi-static loading was studied using TEM to elaborate the strengthening mechanisms. In addition to Orowan (due to presence of Si precipitates), Hall-Petch (due to eutectic Si walls), and dislocation hardening (due to pre-existing entangled dislocations) mechanisms, Mg2Si precipitates (colonies) contributed to the strength of alloy by impeding dislocation motion. The level of this contribution was evaluated as similar to 13 MPa by comparing the modeled and measured yield strength.
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