Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel
This paper present Acoustic Emission (AE) generated during fatigue mechanism of API5LX70 steel which was widely use as gas pipeline materials. Fully reverse (R=-1) constant amplitude fatigue test were done with four different stress amplitudes which were 437.5MPa, 406.25Mpa, 390.6MPa and 359.4MPa re...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
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Trans Tech Publications
2011
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| Online Access: | http://umpir.ump.edu.my/id/eprint/26181/ http://umpir.ump.edu.my/id/eprint/26181/1/Acoustic%20emission%20behavior%20during%20fatigue%20crack%20of%20API5LX70%20gas%20pipeline%20steel.pdf |
| _version_ | 1848822468614029312 |
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| author | Mohd Fadhlan, Mohd Yusof Che Ku Eddy Nizwan, Che Ku Husin Nordin, Jamaludin S., Abdullah |
| author_facet | Mohd Fadhlan, Mohd Yusof Che Ku Eddy Nizwan, Che Ku Husin Nordin, Jamaludin S., Abdullah |
| author_sort | Mohd Fadhlan, Mohd Yusof |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | This paper present Acoustic Emission (AE) generated during fatigue mechanism of API5LX70 steel which was widely use as gas pipeline materials. Fully reverse (R=-1) constant amplitude fatigue test were done with four different stress amplitudes which were 437.5MPa, 406.25Mpa, 390.6MPa and 359.4MPa respectively. An observation from those tests shows that AE Count gives a significant value during cyclic softening and bauschinger effect. Crack initiation indicated by rapid increase of AE count values at positive peak stress and followed by high AE count values around zero stress which indicate crack closure phenomena. Among all four tests, it was show that AE activity from fatigue test with amplitude of 359.4MPa can be significantly divided into 3 region which correspond to crack incubation stage, microplastic and slip plane formation stage and crack initiation and propagation stage. Further analysis was done by separating AE signals from those 3 regions into 6 different groups. Ten AE signatures from each group were selected to calculate AE RMS and AE kurtosis. Analyses on AE RMS which correspond to overall energy of the signal were useful to indicate the microplastic and slip plane formation stage and crack initiation and propagation stage while AE kurtosis was useful in indicating crack stage including initiation, propagation and closure stage. |
| first_indexed | 2025-11-15T02:41:43Z |
| format | Conference or Workshop Item |
| id | ump-26181 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T02:41:43Z |
| publishDate | 2011 |
| publisher | Trans Tech Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-261812020-02-07T01:32:38Z http://umpir.ump.edu.my/id/eprint/26181/ Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel Mohd Fadhlan, Mohd Yusof Che Ku Eddy Nizwan, Che Ku Husin Nordin, Jamaludin S., Abdullah TJ Mechanical engineering and machinery This paper present Acoustic Emission (AE) generated during fatigue mechanism of API5LX70 steel which was widely use as gas pipeline materials. Fully reverse (R=-1) constant amplitude fatigue test were done with four different stress amplitudes which were 437.5MPa, 406.25Mpa, 390.6MPa and 359.4MPa respectively. An observation from those tests shows that AE Count gives a significant value during cyclic softening and bauschinger effect. Crack initiation indicated by rapid increase of AE count values at positive peak stress and followed by high AE count values around zero stress which indicate crack closure phenomena. Among all four tests, it was show that AE activity from fatigue test with amplitude of 359.4MPa can be significantly divided into 3 region which correspond to crack incubation stage, microplastic and slip plane formation stage and crack initiation and propagation stage. Further analysis was done by separating AE signals from those 3 regions into 6 different groups. Ten AE signatures from each group were selected to calculate AE RMS and AE kurtosis. Analyses on AE RMS which correspond to overall energy of the signal were useful to indicate the microplastic and slip plane formation stage and crack initiation and propagation stage while AE kurtosis was useful in indicating crack stage including initiation, propagation and closure stage. Trans Tech Publications 2011 Conference or Workshop Item PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/26181/1/Acoustic%20emission%20behavior%20during%20fatigue%20crack%20of%20API5LX70%20gas%20pipeline%20steel.pdf Mohd Fadhlan, Mohd Yusof and Che Ku Eddy Nizwan, Che Ku Husin and Nordin, Jamaludin and S., Abdullah (2011) Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel. In: International Conference on Information Engineering for Mechanics and Materials (ICIMM 2011) , 13-14 August 2011 , Shanghai, China. pp. 148-152., 80-81. ISSN 16609336 ISBN 978-303785212-5 (Published) https://doi.org/10.4028/www.scientific.net/AMM.80-81.148 |
| spellingShingle | TJ Mechanical engineering and machinery Mohd Fadhlan, Mohd Yusof Che Ku Eddy Nizwan, Che Ku Husin Nordin, Jamaludin S., Abdullah Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel |
| title | Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel |
| title_full | Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel |
| title_fullStr | Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel |
| title_full_unstemmed | Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel |
| title_short | Acoustic emission behavior during fatigue crack of API5LX70 gas pipeline steel |
| title_sort | acoustic emission behavior during fatigue crack of api5lx70 gas pipeline steel |
| topic | TJ Mechanical engineering and machinery |
| url | http://umpir.ump.edu.my/id/eprint/26181/ http://umpir.ump.edu.my/id/eprint/26181/ http://umpir.ump.edu.my/id/eprint/26181/1/Acoustic%20emission%20behavior%20during%20fatigue%20crack%20of%20API5LX70%20gas%20pipeline%20steel.pdf |