A Comparative Study of Clustering Methods for Nanoindentation Mapping Data

IF 2.4 3区 材料科学 Q3 ENGINEERING, MANUFACTURING
Mehrnoush Alizade, Rushabh Kheni, Stephen Price, Bryer C. Sousa, Danielle L. Cote, Rodica Neamtu
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Abstract

Nanoindentation testing and instrumented indentation remain regularly utilized techniques for the assessment of multi-scale mechanical characteristics from load–displacement data analysis, which is central to twenty first century material characterization. The advent of high-resolution nanoindentation-based property mapping has, however, presented challenges in data interpretation, especially when applying proper clustering methodologies to quantify and interpret data as well as draw appropriate conclusions. In this research, we utilized the scikit-learn library in Python to assess the performance of various clustering algorithms, with a focus on nanoindentation-based hardness and elastic modulus measurements, and their synergistic effects. Clustering parameters were meticulously optimized, and in conjunction with domain expert recommendations, the total number of clusters was set to three. The evaluation was grounded in established clustering performance metrics such as the Davies–Bouldin Index, Calinski–Harabasz Index, and the Silhouette score, aiming to ascertain the optimal clustering approach. Among the eight evaluated clustering algorithms, K-means, Agglomerative and FCM emerged as the most effective, while the OPTICS algorithm consistently underperformed for the considered datasets. Augmenting this study, we introduce an intuitive interface, negating the necessity for prior coding or machine learning familiarity, and offering effortless model fine-tuning, visualization, and comparison. This innovation empowers material science and engineering experts, technical staff, and instrumentalists and facilitates the selection of ideal models across varied datasets. The insights and tools presented herein not only enrich material science and engineering research but also lay a robust foundation for sophisticated and dependable analyses in subsequent studies.

Abstract Image

纳米压痕绘图数据聚类方法比较研究
纳米压痕测试和仪器压痕仍然是通过载荷-位移数据分析评估多尺度机械特性的常用技术,这对二十一世纪的材料表征至关重要。然而,基于高分辨率纳米压痕的性能图谱的出现给数据解释带来了挑战,尤其是在应用适当的聚类方法来量化和解释数据以及得出适当结论时。在这项研究中,我们利用 Python 中的 scikit-learn 库评估了各种聚类算法的性能,重点是基于纳米压痕的硬度和弹性模量测量及其协同效应。聚类参数经过精心优化,并结合领域专家的建议,将聚类总数设置为三个。评估以戴维斯-布尔登指数、卡林斯基-哈拉巴什指数和剪影得分等既定聚类性能指标为基础,旨在确定最佳聚类方法。在接受评估的八种聚类算法中,K-means、Agglomerative 和 FCM 是最有效的,而 OPTICS 算法在所考虑的数据集上一直表现不佳。在这项研究的基础上,我们引入了一个直观的界面,无需事先熟悉编码或机器学习,可轻松实现模型微调、可视化和比较。这一创新赋予了材料科学与工程专家、技术人员和工具专家更多的权力,有助于在不同的数据集中选择理想的模型。本文介绍的见解和工具不仅丰富了材料科学与工程研究,还为后续研究中复杂可靠的分析奠定了坚实的基础。
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来源期刊
Integrating Materials and Manufacturing Innovation
Integrating Materials and Manufacturing Innovation Engineering-Industrial and Manufacturing Engineering
CiteScore
5.30
自引率
9.10%
发文量
42
审稿时长
39 days
期刊介绍: The journal will publish: Research that supports building a model-based definition of materials and processes that is compatible with model-based engineering design processes and multidisciplinary design optimization; Descriptions of novel experimental or computational tools or data analysis techniques, and their application, that are to be used for ICME; Best practices in verification and validation of computational tools, sensitivity analysis, uncertainty quantification, and data management, as well as standards and protocols for software integration and exchange of data; In-depth descriptions of data, databases, and database tools; Detailed case studies on efforts, and their impact, that integrate experiment and computation to solve an enduring engineering problem in materials and manufacturing.
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