NOMATEN HYBRID-SEMINAR April 16: Evaluating Tensile Properties of Metallic Materials from Indentation Parameters using an artificial neural network-based model

Date

NOMATEN HYBRID-SEMINAR

online: https://meet.goto.com/NCBJmeetings/nomaten-seminar
In-person: NOMATEN seminar room (102)

Wednesday, APRIL 16th  2025 2 PM (CET)

Evaluating Tensile Properties of Metallic Materials from Indentation Parameters using an artificial neural network-based model

Prof. Jong-hyoung Kim
Pukyong National University, Republic of Korea

 

Abstract:

The instrumented indentation technique is a widely adopted method for assessing mechanical properties such as hardness, elastic modulus, and yield strength. Its ability to continuously measure penetration depth and applied force makes it particularly valuable for in-situ mechanical testing, especially at the nanoscale, enabling multi-purpose evaluations. However, challenges persist in accurately determining material properties due to phenomena such as plastic pileup and sink-in effects, which complicate the calibration of the contact depth—a critical factor for reliable material property assessments using indentation. In our study, we leverage machine learning (ML) to predict tensile properties, including elastic modulus and yield strength, directly from indentation parameters. To address the limitation of insufficient experimental data for model training, we generated a comprehensive dataset through finite element analysis (FEA) simulations. Recognizing the influence of geometric imperfections in indenter tips on indentation responses, we integrate transfer learning and data normalization techniques. These strategies enhance the robustness of the model, improving prediction accuracy for the targeted mechanical properties.

 

Bio:

Jong-hyoung Kim is an Assistant Professor working in the Department of Materials Science and Engineering at Pukyong National University (PKNU), Republic of Korea, since 2024. Kim obtained his BS and PhD degrees in materials science and engineering from SNU in 2012 and 2019, respectively. He was a postdoctoral researcher at Harvard University from 2019 to 2024. Kim can be reached by email at jhkim@pknu.ac.kr.

 


 

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This project has received funding from the European Union Horizon 2020 research and innovation
programme under grant agreement No 857470 and from European Regional Development Fund
via Foundation for Polish Science International Research Agenda PLUS programme grant
No MAB PLUS/2018/8.
Poland
The project is co-financed from the state budget within the framework of the undertaking of the Minister of Science and Higher Education "Support for the activities of Centers of Excellence established under Horizon 2020".

Grant: 5 143 237,70 EUR
Total value: 29 971 365,00 EUR
Date of signing the funding agreement: December 2023

The purpose of the undertaking is to support entities of the higher education and science system that have received funding from the European Union budget in the competition H2020-WIDESPREAD-2018-2020/WIDESPREAD-01-2018-2019: Teaming Phase 2. in the preparation, implementation and updating of activities, maintenance of material resources necessary for carrying out activities, acquisition and modernization of scientific and research apparatus, maintenance and development of personnel potential necessary for the implementation of activities, and dissemination of the results of scientific activities.