期刊
CORROSION SCIENCE
卷 157, 期 -, 页码 126-145出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.05.032
关键词
Additive manufacturing (AM); Direct metal laser sintering (DMLS); AlSi10Mg; Surface roughness; Corrosion; Microstructure
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2017-04368]
- New Brunswick Innovation Foundation (NBIF) [RIF2017-0711]
In this study, in-depth microstructure and electrochemical properties of highly smoothed AlSi10Mg parts fabricated through direct-metal-laser-sintering are reported. The samples with the lowest surface roughness were characterized by having a periodic large and small melt pools (MPs) pattern in their upskin layers. Consequently, a noticeably coarser eutectic-Si network, Al-dendrite and grain size formed along the larger MPs' borders, rationalized by their slower solidification rate. Such microstructural features were found to control/deteriorate the electrochemical performance of the as-printed samples than their surface roughness. An improved electrochemical stability for the samples that experience the fastest solidification rate along their MP-boundaries was revealed.
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