Next Article in Journal
Selection of Collagen Membranes for Bone Regeneration: A Literature Review
Previous Article in Journal
Color Stability and Micro-Hardness of Bulk-Fill Composite Materials after Exposure to Common Beverages
Previous Article in Special Issue
Effects of Nb on the Microstructure and Compressive Properties of an As-Cast Ni44Ti44Nb12 Eutectic Alloy
Open AccessArticle

Micro-Texture Analyses of a Cold-Work Tool Steel for Additive Manufacturing

Korea Institute of Materials Science, 797 Changwon-daero, Changwon, Gyeongnam 51508, Korea
*
Author to whom correspondence should be addressed.
Current address: Technical Evaluation Team, Kyongnam Bank, 642 3·15-daero, MasanHoewon-gu, Changwon, Gyeongnam 51316, Korea.
Current address: Hyundai BNG Steel, 124 Jeokhyeon-ro, Seongsan-gu, Changwon, Gyeongnam 51707, Korea.
Materials 2020, 13(3), 788; https://doi.org/10.3390/ma13030788
Received: 26 December 2019 / Revised: 13 January 2020 / Accepted: 5 February 2020 / Published: 9 February 2020
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Metals and Alloys)
Small objects of an alloy tool steel were built by selective laser melting at different scan speeds, and their microstructures were analyzed using electron backscatter diffraction (EBSD). To present an explicit correlation with the local thermal cycles in the objects, prior austenite grains were reconstructed using the EBSD mapping data. Extensive growth of austenitic grains after solidification could be detected by the disagreement between the networks of carbides and austenite grain boundaries. A rapid laser scan at 2000 mm/s led to less growth, but retained a larger amount of austenite than a slow one at 50 mm/s. The rapid scan also exhibited definite evolution of Goss-type textures in austenite, which could be attributed to the growth of austenitic grains under a steep temperature gradient. The local variations in the microstructures and the textures enabled us to speculate the locally different thermal cycles determined by the different process conditions, that is, scan speeds. View Full-Text
Keywords: additive manufacturing; selective laser melting; tool steel; microstructure; texture; electron backscatter diffraction additive manufacturing; selective laser melting; tool steel; microstructure; texture; electron backscatter diffraction
Show Figures

Figure 1

MDPI and ACS Style

Kang, J.-Y.; Yun, J.; Kim, B.; Choe, J.; Yang, S.; Park, S.-J.; Yu, J.-H.; Kim, Y.-J. Micro-Texture Analyses of a Cold-Work Tool Steel for Additive Manufacturing. Materials 2020, 13, 788.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop