Journal
ADDITIVE MANUFACTURING
Volume 11, Issue -, Pages 23-31Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.addma.2016.04.003
Keywords
Additive manufacturing; Selective laser melting; Shape-memory alloy; X-ray computer tomography
Funding
- DFG, Germany
- CAPES, Brazil [EC111/28-1]
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The Cu-based shape-memory alloy 81.95Cu-11.85Al-3.2Ni-3Mn (wt.%) was processed by selective laser melting (SLM) and the parameters were optimised to obtain compact, fully martensitic samples with a high relative density of up to 99%. Next to the energy dissipated in the material, the scanning strategy was varied and an additional remelting step was applied. The influence of the different processing parameters on the overall density, the defect distribution as well as the grain sizes was then analysed. The processing technique has a strong influence on the degree of porosity and the distribution of the pores, the grain size as well as the grain morphology. SLM thus allows the targeted manipulation of microstructures during manufacturing. Simultaneously, this work stresses the importance of establishing the proper processing parameters for producing high-quality samples. (C) 2016 Elsevier B.V. All rights reserved.
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