Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 장경영 | - |
dc.date.accessioned | 2021-04-16T02:18:20Z | - |
dc.date.available | 2021-04-16T02:18:20Z | - |
dc.date.issued | 2020-02 | - |
dc.identifier.citation | METALS, v. 10, no. 1, article no. 38 | en_US |
dc.identifier.issn | 2075-4701 | - |
dc.identifier.uri | https://www.mdpi.com/2075-4701/10/1/38 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/161534 | - |
dc.description.abstract | The structures in high-temperature environments are prone to undergo hardening and embrittlement as a result of thermal aging; this can cause variations in their mechanical properties. Because these changes occur at the microstructural level, it is difficult to evaluate them through linear ultrasonic techniques. In this work, a surface acoustic wave (SAW) was used to measure and compare the acoustic nonlinearity and mechanical properties of Al6061 alloys heat-treated at 220 degrees C for different durations (0 min, 20 min, 40 min, 1 h, 2 h, 10 h, 100 h, 1000 h). The SAW was generated by a pulsed laser and then received by an interferometer. Moreover, the yield strength, ultimate strength, and elongation to failure were measured by tensile tests. The results demonstrate that the critical variations in the mechanical properties can be detected by monitoring the variation features in the acoustic nonlinearity. Transmission electron microscopy images were captured to observe the microstructural changes, which shows that the acoustic nonlinearity varied according to the change in the precipitation phase. This supports the acoustic nonlinearity measurement using the laser-generated SAW being an effective technique for the fully noncontact nondestructive evaluation of material degradations as well as changes in mechanical properties. | en_US |
dc.description.sponsorship | This research was supported by the Nuclear Power Research and Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2013M2A2A9043241). | en_US |
dc.language.iso | en | en_US |
dc.publisher | MDPI | en_US |
dc.subject | thermal aging | en_US |
dc.subject | heat treatment | en_US |
dc.subject | surface acoustic wave | en_US |
dc.subject | laser | en_US |
dc.subject | acoustic nonlinearity | en_US |
dc.subject | nonlinear parameter | en_US |
dc.subject | material degradation | en_US |
dc.subject | mechanical property | en_US |
dc.subject | precipitation | en_US |
dc.title | Nondestructive Evaluation of Thermal Aging in Al6061 Alloy by Measuring Acoustic Nonlinearity of Laser-Generated Surface Acoustic Waves | en_US |
dc.type | Article | en_US |
dc.relation.no | 1 | - |
dc.relation.volume | 10 | - |
dc.identifier.doi | 10.3390/met10010038 | - |
dc.relation.page | 1-15 | - |
dc.relation.journal | METALS | - |
dc.contributor.googleauthor | Jun, Jihyun | - |
dc.contributor.googleauthor | Seo, Hogeon | - |
dc.contributor.googleauthor | Jhang, Kyung-Young | - |
dc.relation.code | 2020052160 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DIVISION OF MECHANICAL ENGINEERING | - |
dc.identifier.pid | kyjhang | - |
dc.identifier.orcid | http://orcid.org/0000-0001-5168-2361 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.