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Microstructural Characterization and Mechanical Performance of Hot Work Tool Steel Processed by Selective Laser Melting

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Abstract

Microstructural characterization of hot work tool steel processed by selective laser melting was carried out. The findings shed light on the interrelationship between processing parameters and the microstructural evolution. It was found that the microstructure after layer-wise processing partially consists of metastable-retained austenite which transforms to martensite in a subsequent tensile test. This improves the mechanical properties of the hot work tool steel enabling direct application.

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Financial support by the Federal State of North Rhine-Westphalia and the industrial partners within the DMRC is gratefully acknowledged. TN acknowledges support by DFG under contract No. NI1327/7-1.

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Correspondence to Martin Joachim Holzweissig.

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Manuscript submitted November 20, 2014.

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Holzweissig, M.J., Taube, A., Brenne, F. et al. Microstructural Characterization and Mechanical Performance of Hot Work Tool Steel Processed by Selective Laser Melting. Metall Mater Trans B 46, 545–549 (2015). https://doi.org/10.1007/s11663-014-0267-9

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