EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components

Additive manufacturing (AM) has reached widespread use in manufacturing industries in recent years. Defect inspection and geometric accuracy is critical in manufacturing for quality control. Ultrasonic testing (UT) is one of the best NDT methods used to detects flaws in AM products currently. EMA...

Full description

Saved in:
Bibliographic Details
Main Author: Lim, Ting Hui
Other Authors: Fan Zheng, David
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2023
Subjects:
Online Access:https://hdl.handle.net/10356/167082
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-167082
record_format dspace
spelling sg-ntu-dr.10356-1670822023-05-27T16:50:47Z EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components Lim, Ting Hui Fan Zheng, David School of Mechanical and Aerospace Engineering Advanced Remanufacturing and Technology Centre ZFAN@ntu.edu.sg Engineering::Mechanical engineering Additive manufacturing (AM) has reached widespread use in manufacturing industries in recent years. Defect inspection and geometric accuracy is critical in manufacturing for quality control. Ultrasonic testing (UT) is one of the best NDT methods used to detects flaws in AM products currently. EMAT is a way to perform UT which does not require contact with the test piece as compared to Piezoelectric Transducers. This project will use electromagnetic acoustic transducer (EMAT) to detect flaws in AM samples with rough surfaces. Conventional Piezoelectric Transducer was also used as a reference to compare the results obtained from using EMAT. AM samples were drilled with side-drilled holes (SDH) and flat-bottomed holes (FBH) which are common reference standards used in UT. Point pulse-echo testing were performed on the samples using both EMAT and Piezoelectric Transducer. The A-scans of the defects obtained were compared to evaluate the effectiveness of EMAT. EMAT is also useful for thickness measurement and was performed on a Rusted Sample with a rough surface. These measurements were then compared and evaluated. It was concluded that EMAT is more effective in both defect measurement and thickness measurement as compared to Piezoelectric Transducers, in terms of the signal-to-noise ratios and peak values. Bachelor of Engineering (Mechanical Engineering) 2023-05-21T12:26:28Z 2023-05-21T12:26:28Z 2023 Final Year Project (FYP) Lim, T. H. (2023). EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/167082 https://hdl.handle.net/10356/167082 en B084 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
spellingShingle Engineering::Mechanical engineering
Lim, Ting Hui
EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components
description Additive manufacturing (AM) has reached widespread use in manufacturing industries in recent years. Defect inspection and geometric accuracy is critical in manufacturing for quality control. Ultrasonic testing (UT) is one of the best NDT methods used to detects flaws in AM products currently. EMAT is a way to perform UT which does not require contact with the test piece as compared to Piezoelectric Transducers. This project will use electromagnetic acoustic transducer (EMAT) to detect flaws in AM samples with rough surfaces. Conventional Piezoelectric Transducer was also used as a reference to compare the results obtained from using EMAT. AM samples were drilled with side-drilled holes (SDH) and flat-bottomed holes (FBH) which are common reference standards used in UT. Point pulse-echo testing were performed on the samples using both EMAT and Piezoelectric Transducer. The A-scans of the defects obtained were compared to evaluate the effectiveness of EMAT. EMAT is also useful for thickness measurement and was performed on a Rusted Sample with a rough surface. These measurements were then compared and evaluated. It was concluded that EMAT is more effective in both defect measurement and thickness measurement as compared to Piezoelectric Transducers, in terms of the signal-to-noise ratios and peak values.
author2 Fan Zheng, David
author_facet Fan Zheng, David
Lim, Ting Hui
format Final Year Project
author Lim, Ting Hui
author_sort Lim, Ting Hui
title EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components
title_short EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components
title_full EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components
title_fullStr EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components
title_full_unstemmed EMAT (electromagnetic acoustic transducer) UT (ultrasonic testing) for thickness measurement and defect inspection on AM components
title_sort emat (electromagnetic acoustic transducer) ut (ultrasonic testing) for thickness measurement and defect inspection on am components
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/167082
_version_ 1772828889804963840