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An additively manufactured AlCuMnZr alloy microstructure and tensile mechanical properties

Selective laser melting (SLM) was used to fabricate an AlCuMnZr alloy. The microstructural features that resulted from additive manufacturing (AM) were significantly refined compared to the corresponding cast alloy features. A combination of fine equiaxed and columnar grains along with in-situ forma...

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Bibliographic Details
Published in:Materialia 2020-08, Vol.12 (C), p.100758, Article 100758
Main Authors: Shyam, A., Plotkowski, A., Bahl, S., Sisco, K., Allard, L.F., Yang, Y., Haynes, J.A., Dehoff, R.R.
Format: Article
Language:English
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Summary:Selective laser melting (SLM) was used to fabricate an AlCuMnZr alloy. The microstructural features that resulted from additive manufacturing (AM) were significantly refined compared to the corresponding cast alloy features. A combination of fine equiaxed and columnar grains along with in-situ formation of θ′ precipitates during AM leads to enhanced yield strength (up to 300 °C) in the as-fabricated AM alloy. The refinement of brittle intermetallics and a bimodal grain size distribution leads to improved tensile elongation in the AM alloy. The results illustrate the microstructural advantages that can result from additive processing over conventionally processed microstructures. [Display omitted]
ISSN:2589-1529
2589-1529
DOI:10.1016/j.mtla.2020.100758