Creating and Visualizing the Materials Science Knowledge Graph with Whyis ⋆ Jamie McCusker 1[0000-0003-1085-6059] , Michael Deagen 2[0000-0002-8034-0667] , Tolulomo Fateye 3[0000-0002-2061-2261] , Anya Wallace 4[0000-0003-3123-2122] , Sabbir M. Rashid 1[0000-0002-4162-8334] , and Deborah L. McGuinness 1[0000-0001-7037-4567] 1 Department of Computer Science, Rensselaer Polytechnic Institute, Troy, NY, US {mccusj2,rashis}@rpi.edu, dlm@cs.rpi.edu 2 College of Engineering and Mathematical Sciences, University of Vermont, Burlington, VT, US Michael.Deagen@uvm.edu 3 Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, US tolulomo.fateye@duke.edu 4 Department of Mechanical Engineering and Applied Physics, California Institute of Technology, Pasadena, CA, US awallace@caltech.edu Abstract. The NanoMine knowledge graph is being expanded to sup- port a broader range of materials, now including metamaterials, and is now called MaterialsMine. In the process, we have added new knowledge curation and visualization capabilities to Whyis, the framework that Ma- terialsMine (and NanoMine before it) is built on. This demonstration will show how we use Whyis to support user-provided data uploads that con- form to the Dataset Catalog standard, use DOI and ORCiD to populate dataset metadata, curate data files into knowledge graph fragments us- ing Semantic Data Dictionaries, and allow domain scientists to visualize and explore the graph using SPARQL, Vega-Lite, and Data Voyager. Keywords: Semantic Science · Knowledge Graphs · Knowledge Engi- neering. 1 Introduction We will demonstrate the MaterialsMine knowledge graph and how it was devel- oped using the Whyis Knowledge Graph Framework [4]. Materials science studies the interrelationships between processing and properties of materials by analyz- ing material structure at multiple length scales. The MaterialsMine knowledge graph builds on the NanoMine knowledge graph [3] by expanding into datasets for mechanical and acoustic metamaterials and generalizing the ability to curate data from materials science. Metamaterials are materials that have their proper- ties modified through their structures, resulting in radically different accoustic, ⋆ Copyright ©2021 for this paper by its authors. Use permitted under Creative Com- mons License Attribution 4.0 International (CC BY 4.0). The authors gratefully acknowledge support of the NSF CSSI program (OAC-1835677).