TY - GEN
T1 - Simultaneous material microstructure classification and discovery via hidden Markov modeling of acoustic emission signals
AU - Zhao, Xinyu
AU - Iquebal, Ashif
AU - Sun, Huifeng
AU - Yan, Hao
N1 - Publisher Copyright:
Copyright © 2020 ASME
PY - 2020
Y1 - 2020
N2 - Acoustic emission (AE) signals have been widely employed for tracking material properties and structural characteristics. In this study, we aim to analyze the AE signals gathered during a scanning probe lithography process to classify the known microstructure types and discover unknown surface microstructures/anomalies. To achieve this, we developed a Hidden Markov Model to consider the temporal dependency of the high-resolution AE data. Furthermore, we compute the posterior classification probability and the negative likelihood score for microstructure classification and discovery. Subsequently, we present a diagnostic procedure to identify the dominant AE frequencies that allow us to track the microstructural characteristics. Finally, we apply the proposed approach to identify the surface microstructures of additively manufactured Ti-6Al-4V and show that it not only achieved a high classification accuracy (e.g., more than 90%) but also correctly identified the microstructural anomalies that may be subjected further investigation to discover new material phases/properties.
AB - Acoustic emission (AE) signals have been widely employed for tracking material properties and structural characteristics. In this study, we aim to analyze the AE signals gathered during a scanning probe lithography process to classify the known microstructure types and discover unknown surface microstructures/anomalies. To achieve this, we developed a Hidden Markov Model to consider the temporal dependency of the high-resolution AE data. Furthermore, we compute the posterior classification probability and the negative likelihood score for microstructure classification and discovery. Subsequently, we present a diagnostic procedure to identify the dominant AE frequencies that allow us to track the microstructural characteristics. Finally, we apply the proposed approach to identify the surface microstructures of additively manufactured Ti-6Al-4V and show that it not only achieved a high classification accuracy (e.g., more than 90%) but also correctly identified the microstructural anomalies that may be subjected further investigation to discover new material phases/properties.
UR - http://www.scopus.com/inward/record.url?scp=85101478721&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85101478721&partnerID=8YFLogxK
U2 - 10.1115/MSEC2020-8454
DO - 10.1115/MSEC2020-8454
M3 - Conference contribution
AN - SCOPUS:85101478721
T3 - ASME 2020 15th International Manufacturing Science and Engineering Conference, MSEC 2020
BT - Manufacturing Processes; Manufacturing Systems; Nano/Micro/Meso Manufacturing; Quality and Reliability
PB - American Society of Mechanical Engineers
T2 - ASME 2020 15th International Manufacturing Science and Engineering Conference, MSEC 2020
Y2 - 3 September 2020
ER -