Unsupervised Learning of Nanoindentation Data to Infer Microstructural Details of Complex Materials

• URL: http://arxiv.org/abs/2309.06613v1
• Date: Tue, 12 Sep 2023 21:45:33 GMT
• Title: Unsupervised Learning of Nanoindentation Data to Infer Microstructural Details of Complex Materials
• Authors: Chen Zhang, Cl\'emence Bos, Stefan Sandfeld, Ruth Schwaiger
• Abstract summary: Cu-Cr composites were studied by nanoindentation. An unsupervised learning technique was employed to analyze the data. Cross-validation was introduced to infer whether the data quantity was adequate.
• Score: 4.771578529731914
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: In this study, Cu-Cr composites were studied by nanoindentation. Arrays of indents were placed over large areas of the samples resulting in datasets consisting of several hundred measurements of Young's modulus and hardness at varying indentation depths. The unsupervised learning technique, Gaussian mixture model, was employed to analyze the data, which helped to determine the number of "mechanical phases" and the respective mechanical properties. Additionally, a cross-validation approach was introduced to infer whether the data quantity was adequate and to suggest the amount of data required for reliable predictions -- one of the often encountered but difficult to resolve issues in machine learning of materials science problems.

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